| Entries |
| Document | Title | Date |
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| 20080197939 | PASSIVE MICROWAVE (DE)MULTIPLEXER - The present invention relates to a microwave filter bank intended to be used either as or a multiplexer or de-multiplexer in a UWB-type system, said microwave filter bank including a plurality of filters and an interconnection network both connecting a first port (Pifb) of said microwave filter bank to other ports of said microwave filter bank. Said microwave filter bank is characterised in that said interconnection network includes a plurality of inductors, one of said inductors (Li), said first, has one of its extremities directly connected to said first port (Pifb) and its second extremity connected to the ground through a capacitor (Ci), said first, intended to minimize the effect of the reflection response of the microwave filter bank in its operating sub-bands without degrading its transmission response, said first inductor (Li) and capacitor (Ci) being intended to provide a nearly constant total admittance at said first port of said microwave filter bank for the operating band of each of said filters, each of other inductors, said second, is intended to provide a good in-band matching of the response of one of said filters with a targeted response. | 08-21-2008 |
| 20080204163 | Multi-Band Circuit - A multiband circuit includes a signal path comprising a first signal branch that includes a first circuit that is transmissive in a first frequency band and a second signal branch that includes a second circuit that is transmissive in a second frequency band. The first and second signal branches are combined on an antenna side into a common path. | 08-28-2008 |
| 20080224798 | Active Step Attenuator - An active step attenuator can attenuate the RF signal from a cable modem or other RF source. The active step attenuator converts the RF energy into a DC control signal that controls the attenuation applied to the RF signal. The voltage of the control signal is proportional to the RF energy, so that the active step attenuator attenuates a stronger RF signal more than a weaker RF signal. The active step attenuator may be in the form of a diplex circuit, one branch of which passes signals in one frequency band without attenuation and the other branch of which actively attenuates signals in another frequency band. | 09-18-2008 |
| 20090002094 | Power Line Coupling Device and Method - A power line coupler for communicating data signals over a power distribution system having a first and second overhead energized medium voltage power line conductors is provided. In one embodiment, the coupler includes a first lightening arrestor having a first end and a second end, wherein the first end of the first arrestor is connected to the first power line conductor. The coupler further includes a first high frequency impedance having a first end connected to the second end of the first lightening arrestor and the first impedance having a second end connected to a neutral conductor of the power line distribution system. The coupler may further include a second lightening arrestor having a first end and a second end, wherein the first end of the second arrestor is connected to the second power line conductor. The coupler further including a second high frequency impedance having a first end connected to the second end of the second lightening arrestor and a second end connected to the neutral conductor. The first high frequency impedance and the second high frequency impedance may each comprise an air core coil that forms an inductor. The coupler may further include a balun having a first winding and a second winding, wherein the first winding is coupled to a communication device, and wherein the second winding has a first end connected to the first end of the first high frequency impedance and a second end connected to the first end of the second high frequency impedance. | 01-01-2009 |
| 20090033437 | FILTER MODULE AND COMMUNICATION APPARATUS - In a filter module, a common input/output portion of a switch circuit is set as a first port. A first filter arranged to pass a signal in a first frequency band is connected between a first input/output portion of the switch circuit and a second port. A second filter arranged to pass a signal in a second frequency band is connected between a second input/output portion and the second port. A phase adjusting circuit is provided such that an impedance in the second frequency band as seen from the first port while the switch circuit selects the first input/output portion is in a substantially short-circuited state. This arrangement prevents leakage of unwanted signals from a signal path used in a communication system not in operation among two communication systems for different frequency bands while the other communication system is engaged in communication. | 02-05-2009 |
| 20090058556 | ANTENNA END FILTER ARRANGEMENT - An arrangement for filtering the transmitting signals in a radio device using frequency division duplex. In a radio transmitter, in which the transmitting signal is divided to a plurality of antennas (ANT | 03-05-2009 |
| 20090289738 | Filter Characteristics Regulating Method, Filter Characteristics Regulator, Filter, and Communication Apparatus - When an attenuation pole produces, highly-efficient-izing and a miniaturization of a filter are enabled by changing the electric length between a branch point and each filter. The 1st band pass filter | 11-26-2009 |
| 20090289739 | Radio communication apparatus - There is provided a radio communication apparatus for transmitting transmission signals of the channel CH | 11-26-2009 |
| 20090289740 | ACOUSTIC WAVE FILTER APPARATUS AND DUPLEXER - A second band pass filter that is used in a filter device, which has a relatively high pass band, in the pass band of a first band pass filter is provided. One end of a second IDT of a second longitudinally coupled resonator surface acoustic wave filter portion is connected to a first balanced terminal and the other end thereof is connected to a second balanced terminal. Each of a first longitudinally coupled resonator surface acoustic wave filter portion and the second longitudinally coupled resonator surface acoustic wave filter portion has narrow pitch electrode finger portions. The number of electrode fingers of the narrow pitch electrode finger portion of the second IDT of the first longitudinally coupled resonator surface acoustic wave filter portion is greater than the number of electrode fingers of the narrow pitch electrode finger portion of the second IDT of the second longitudinally coupled resonator surface acoustic wave filter portion. | 11-26-2009 |
| 20090295501 | DIPLEXER CIRCUIT, HIGH-FREQUENCY CIRCUIT AND HIGH-FREQUENCY MODULE - A diplexer circuit comprising a common terminal, a low-frequency-side terminal, a high-frequency-side terminal, a low-frequency-side path comprising a low-frequency filter disposed between the common terminal and the low-frequency-side terminal, and a high-frequency-side path comprising a high-frequency filter disposed between the common terminal and the high-frequency-side terminal, the low-frequency filter comprising a first transmission line series-connected to the low-frequency-side path and a capacitor parallel-connected to part of the first transmission line. | 12-03-2009 |
| 20090322444 | RESONATOR DEVICE, FILTER INCLUDING THE SAME, AND DUPLEXER - A resonator device includes a plurality of resonators which are connected in series. An inductor and a capacitor are connected in parallel with at least one of the plurality of resonators. At least another one of the plurality of resonators has no inductor or capacitor connected in parallel therewith. Therefore, a sufficiently large attenuation outside the passband can be attained when the resonator device is used in a filter. Furthermore, the resonator device can be reduced in size. | 12-31-2009 |
| 20100001811 | CIRCUIT FOR SEPARATING OR COMBINING HIGH FREQUENCY POWER - An improved component for the separation or combination of high frequency outputs includes a coaxial input port located at the front end of the outer conductor. At the opposite end of the outer conductor, a head is located with at least two, and preferably three or four, single ports which cover the outer conductor connections. The head with the single ports is built as a single part to avoid any mechanical connection junctions. The head with the single ports which form integral outer conductor connectors consists of a forged part or a cast part. | 01-07-2010 |
| 20100007432 | Orthomode junction assembly with associated filters for use in an antenna feed system - A reverse orthomode junction assembly with associated filters for use in an antenna feed system for transmitting a first electromagnetic signal at a first frequency range lower than the second frequency range of a receive second electromagnetic signal. The assembly includes an orthomode junction with an antenna port for connecting to an antenna, an opposed generally coaxial first signal port to transmit the first signal, and a generally perpendicular second signal port, located there between, to receive the second signal. A first signal channel having on-axis second signal reject filters connects to the first port; and a second signal channel having cross-axis first signal reject filters connects to the second port. The use of a magic-tee as a combiner for the receive signal provides tracking capability to the antenna feed system. | 01-14-2010 |
| 20100007433 | Power Splitter/Combiner - The present invention is directed to a system that includes a front-end interface device having a first front-end interface port, a second front-end interface port and a third front-end interface port. The front-end interface device is configured to split a first signal directed into the first front-end interface port into a second signal provided at the second front-end interface port and a third signal provided at the third front-end interface port. The first signal has a first bandwidth, the second signal has a second bandwidth and the third signal has a third bandwidth. The second bandwidth is substantially disposed in a relatively high frequency portion of the first bandwidth and the third bandwidth is substantially disposed in a relatively low frequency portion of the first bandwidth. An N-way high-band device includes a first high-band device port coupled to the second front-end interface port and N second high band ports. N is an integer greater than or equal to two (2). The N-way high-band device is configured to split the second signal into N-high band signals and direct the N-high band signals out of corresponding ones of the N-second high band ports. An N-way low-band device includes a first low-band device port coupled to the third front-end interface port and N-second low band ports. The N-way low-band device is configured to split the third signal into N-low band signals and direct the N-low band signals out of corresponding ones of the N-second low band ports. N back-end interface devices are coupled to the N-way high-band device and the N-way low-band device. Each back-end interface device of the N back-end interface devices includes a first back-end interface port coupled to a corresponding one of the N second high band ports, a second back-end interface port coupled to a corresponding one of the N second low band ports, and a third back-end interface port. Each back-end interface is configured to combine one of the N-high band signals and one of the N-low band signals to form a fourth signal directed out of the third back-end interface port such that N-fourth signals are directed out of the N back-end interface devices. The fourth signal has a fourth bandwidth. The fourth signal is a version of the first signal such that the fourth bandwidth and the first bandwidth are substantially identical. | 01-14-2010 |
| 20100052813 | BRANCHING FILTER, SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE, AND COMMUNICATION MOBILE TERMINAL - A technique for realizing module size reduction while enhancing the anti-ESD characteristic of a low frequency band circuit without the need to add such an element as an ESD filter. In a diplexer included in a high-frequency power amplifier module, a composite grounding inductor with respect to an antenna terminal is formed of three inductors including a series inductor contained in a lowpass filter. Since an ESD signal contains main components thereof belonging to a frequency band of the order of a few hundreds of MHz or lower, the ESD signal is allowed to pass through a lowpass filter almost intactly. Under this condition, a function for ESD filtering from the antenna terminal to an antenna switch circuit is provided by using the composite grounding inductor mentioned above and an electrostatic capacitor element, thereby suppressing passage of the ESD signal to the antenna switch circuit. | 03-04-2010 |
| 20100052814 | Controlled RF Active Duplexer - A controlled RF active duplexer comprises two distributed amplifiers and means for controlling them. Each distributed amplifier comprises an input line and an output line, the output line of the first distributed amplifier being common to the input line of the second distributed amplifier. An end of the input line of the first distributed amplifier forms the input port, an end of the output line of the second distributed amplifier forms the output port and an end of the line common to the two distributed amplifiers forms the input/output port. The distributed amplifiers are placed in the on state or in the off state in opposition to one another as a function of the ports to be made to communicate. The invention makes it possible to carry out the splitting of the RF signals within a compact space and isolation between input port and output port. | 03-04-2010 |
| 20100060378 | FILTER CIRCUIT AND RADIO COMMUNICATION DEVICE - The present invention provides a filter circuit that can achieve both sharp bandpass characteristics and high power handling capability. The filter circuit includes: an input terminal that has a signal input; a four-port device that divides input signals; a band stop filter that has the center frequency of the input signals within the stopband, and causes the out-of-stopband signals among the input signals to pass; two bandstop resonators circuits that cause the signals passing through the band stop filters to pass, and reflect the signals; open ends that are connected in parallel to the two bandstop resonators circuits; and an output terminal that outputs the signals reflected by the band stop filters and the bandstop resonators circuits and combined at the four-port device. | 03-11-2010 |
| 20100085131 | FILTER CIRCUIT AND VOLTAGE-CONTROLLED OSCILLATING CIRCUIT - A filter circuit includes a phase inversion branching circuit branching an input signal and outputting separately first and second signals with mutually-inverted phases from first and second output terminals; a first band rejection filter connected the first output terminal of the phase inversion branching circuit and having a first rejection band; a second band rejection filter connected to the second output terminal of the phase inversion branching circuit and having a second rejection band different from the first rejection band; and a combiner combining the outputs of the first and second band rejection filters. | 04-08-2010 |
| 20100090778 | RADIO FREQUENCY FILTER - A radio frequency filter ( | 04-15-2010 |
| 20100109799 | Split Band Signal Processing - A split-band system for processing a broadband input signal is disclosed. A signal divider divides the input signal into at least a higher frequency band and a lower frequency band. The lower frequency band is processed in a lower frequency circuit path. The higher frequency band is processed in a higher frequency circuit path. The higher frequency circuit path has a group delay equal to the lower frequency circuit path. A signal combiner combines the processed lower frequency band and the processed higher frequency band into an output signal. | 05-06-2010 |
| 20100109800 | DUPLEXER, COMMUNICATION MODULE, AND COMMUNICATION DEVICE - A duplexer of the present invention includes a reception filter ( | 05-06-2010 |
| 20100134202 | Output selection of multi-output filter - Described is a filtering arrangement in which a first filter is configured to exhibit a first frequency response FR and has a first node and a second node; a second filter is configured to exhibit a second FR and has a first node and a second node; and a third filter is configured to exhibit a third FR and has a first node and a second node. A first common node interfaces the second node of the first filter with the second node of the second filter; and a second common node interfaces the first node of the second filter with the first node of the third filter. The second FR exhibited by the second filter isolates a first signal on a first signal path between the first node of the first filter and the first common node from a second signal on a second signal path between the second common node and the second node of the third filter. | 06-03-2010 |
| 20100141352 | Duplex Filter with Recessed Top Pattern Cavity - A duplex filter includes a core of dielectric material with top, bottom, and side surfaces, and first and second spaced-apart sets of through-holes extending therethrough. A wall extends outwardly from the top surface to define a peripheral rim and cavity. A pattern of metallized and unmetallized areas are defined on selected core surfaces including strips of metallization on the top surface that extend onto the wall and the peripheral rim thereof to define respective transmit, receive, and antenna connection posts. In one embodiment, the core is made from two separate blocks which have been coupled together to define an interior metallized layer which separates the first and second sets of through-holes and an exterior wall on the top surface separates the respective transmit and receive conductive patterns thereon. | 06-10-2010 |
| 20100148886 | DUPLEXER, MODULE INCLUDING A DUPLEXER AND COMMUNICATION APPARATUS - A duplexer includes a common terminal, receiving filters, a transmitting filter, and a hybrid having four terminals (terminals | 06-17-2010 |
| 20100171565 | DIVISION CIRCUIT - A division circuit includes: a signal input/output terminal to and from which two signals, that is, a first signal using a first frequency band and a second signal using a second frequency band higher than the first frequency band, are input and output; a first low-pass filter which does not pass the second signal and passes the first signal; a first high-pass filter which is formed such that a plurality of serial resonant circuits set at different resonant frequencies, respectively, is cascaded in parallel and which does not pass the first signal and passes the second signal; and a division point connecting one end of the first low-pass filter to one end of the first high-pass filter between the signal input/output terminal, the first low-pass filter, and the first high-pass filter. In the plurality of series resonant circuits, a first serial resonant circuit is located from the division point. | 07-08-2010 |
| 20100194493 | BALUN SIGNAL SPLITTER - A balun signal splitter for use in transceiver systems, such as wireless communications systems, including a wide-band balun with a secondary winding for signal splitting between two operating bands (e.g., high-band and low-band) or modes. An example of a balun signal splitter configured for dual-band or dual-mode operation or includes a balun having a primary winding and a secondary winding, the secondary winding having a first port and a second port, a first network coupled to the first port and configured to present a short circuit impedance at the first port at out-of-band frequencies or during out-of-mode operation, and a second network coupled to the second port and configured to present a short circuit impedance at the second port at out-of-band frequencies or during out-of-mode operation. | 08-05-2010 |
| 20100207703 | METAMATERIAL POWER AMPLIFIER SYSTEMS - Power amplifying systems and modules and components therein are designed based on CRLH structures, providing high efficiency and linearity. | 08-19-2010 |
| 20100244982 | ULTRA WIDE-BAND DUAL-FREQUENCY COMBINER - An ultra wideband dual-frequency combiner includes a combination port (Port | 09-30-2010 |
| 20100253446 | METHOD AND DEVICE FOR PSEUDO-DIFFERENTIAL TRANSMISSION - The invention relates to a method and a device for pseudo-differential transmission in interconnections used for sending a plurality of electrical signals. The ends of an interconnection having 4 transmission conductors and a return conductor distinct from the reference conductor are each connected to a termination circuit. Three damping circuits are connected between the return conductor and the reference conductor. The transmitting circuits receive at their inputs the signals from the 4 channels of the two sources, and are connected to the conductors of the interconnection. The receiving circuits are connected to the conductors of the interconnection, each receiving circuit being such that the 4 channels of a source connected to a transmitting circuit in the activated state are sent to the four channels of the destinations without noticeable external crosstalk. | 10-07-2010 |
| 20100253447 | FILTER BANKS FOR ENHANCING SIGNALS USING OVERSAMPLED SUBBAND TRANSFORMS - For subband decomposition of a d-dimensional input signal (S) into a number K of subband components (F | 10-07-2010 |
| 20100289599 | High Performance RF Rx Module - An RF module for use in an RF signal transceiver system. In one embodiment, the RF module comprises a substrate having at least a duplexer filter, first and second bandpass filters and first and second low noise amplifiers mounted thereon. The substrate includes respective edges having respective RF signal input/output and supply voltage terminals defined therein. The overall dimensions of the substrate and/or the location of the respective terminals have been predetermined in a manner which allows the same size substrate with the same terminal locations to be used for several different air interfaces such as, for example, EGSM, GSM 850, DCS, and PCS applications, irrespective of a specific air interface need for differently sized and/or additional filters. | 11-18-2010 |
| 20110006855 | ELASTIC WAVE FILTER, AND DUPLEXER AND ELECTRONIC DEVICE USING SAME - An elastic wave filter has first, second, and third IDT electrodes whose wiring electrodes are connected to unbalanced signal terminal; fourth IDT electrode disposed between the first and second IDT electrodes; fifth IDT electrode disposed between the second and third IDT electrodes; and first and second balanced signal terminals connected to the wiring electrodes of fourth and fifth IDT electrodes, respectively. The ground electrodes of the first through fifth IDT electrodes are connected to the ground. Signals in opposite phase and in phase with a signal input to unbalanced signal terminal are output from first and second balanced signal terminals, respectively. The wiring electrodes of second and third IDT electrodes are adjacent to the ground electrode of fifth IDT electrode. The wiring electrode of one of first and second IDT electrodes is adjacent to the wiring electrode of fourth IDT electrode. The ground electrode of the other is adjacent to the ground electrode of fourth IDT electrode. This configuration can suppress spuriousness in the bandpass. | 01-13-2011 |
| 20110032050 | DUPLEXER FOR INTEGRATION IN COMMUNICATION TERMINALS - There is described a duplexer comprising: a dielectric substrate having a circuit-receiving surface and an opposite surface; a ground structure deposited on the circuit-receiving surface or the opposite surface; a first filter connectable to a first terminal and having a first frequency bandpass; a second filter connectable to a second terminal and having a second frequency bandpass different from the first frequency bandpass, the first filter and the second filter each having at least one filter section deposited on the circuit-receiving surface; and an uncovered coupling circuit connectable to a third terminal and deposited on the circuit-receiving surface between the first filter and the second filter, the coupling circuit being spaced apart from the first and second filter by a coupling gap and configured for electromagnetically coupling the first filter and the second filter together. | 02-10-2011 |
| 20110043300 | Variable Bandwidth Tunable Silicon Duplexer - A tunable duplexer using voltage-controlled varactors is presented. The center frequency, the pass band, and the stop band are each tunable to meet system requirements. A calibration circuit driving digital to analog converters produces the necessary voltages used in the resonant circuits. The tunable duplexer can be fabricated on a single silicon chip. On-chip transformers can be used to reduce the voltage level of signals in the filters to improve the linearity of the duplexer. | 02-24-2011 |
| 20110050359 | High-Performance Conversion Between Single-Ended and Differential/Common-Mode Signals - A signal conversion apparatus includes first and second input ports and first and second output ports. A first splitter is coupled to convert a first single-ended signal received on the first input port into a differential signal including first and second opposite-phase components, and to provide the first and second opposite-phase components respectively on the first and second output ports. A second splitter is separate from the first splitter and is coupled to convert a second single-ended signal received on the second input port into a common-mode signal including first and second in-phase components, and to provide the first and second in-phase components respectively on the first and second output ports together with the first and second opposite-phase components. | 03-03-2011 |
| 20110133852 | MULTIPLEXED SERIAL CONTROL BUS - A signal line sharing protocol and hardware permit control of a remotely located active device configured to provide different load configurations to an antenna. As an example, the communication system may include a master device. The master device may include a general purpose output and a radio frequency port. The communication system may further include a first duplexer and a second duplexer. The first duplexer may include a first port, a second port, and a third port, where the second port is coupled to the radio frequency port and the third port is coupled to the general purpose output of the master device. The second duplexer may include a first port, a second port, and a third port, where the first port of the second duplexer is in communication with the first port of the first duplexer, wherein the second port is coupled to an antenna, and where the third port is in communication with a slave device. The slave device may be coupled to the antenna. In response to commencement of a command from the master device, the slave device may clamp the antenna to ground. | 06-09-2011 |
| 20110156835 | DUPLEXER MODULE - A duplexer module that is used for transmission and reception of a signal in at least two communication systems using different frequency bands includes a wiring board, dual transmission filters in a transmission filter unit that is provided on the wiring board and that includes a transmission filter, and dual reception filters in a reception filter unit that is provided on the wiring board and that includes a reception filter. Each of the dual reception filters includes at least two reception filters having different frequency bands, and the output side of the reception filters is shared between the reception filters such that a common output terminal is provided for the reception filters. | 06-30-2011 |
| 20110169588 | BRANCHING FILTER, AND WIRELESS COMMUNICATION MODULE AND WIRELESS COMMUNICATION DEVICE USING SAME - Provided are a branching filter capable of well branching two electrical signals having a wide frequency band, and a wireless communication module and wireless communication device using same. The branching filter is provided with an input terminal ( | 07-14-2011 |
| 20110181371 | BAND SELECTIVE ISOLATION BRIDGE FOR SPLITTER - A splitter device includes a first splitter comprising an input leg coupled to a provider content input port, a first output leg, and a second output leg. The provider content input port is configured to receive a downstream-propagating provider bandwidth. The splitter device further includes a first conductive path coupled to the first output leg of the first splitter, and a second conductive path coupled to the second output leg of the first splitter. The splitter device further includes a second splitter having an input leg coupled to a first home network bandwidth, a first output leg coupled to the first conductive path, and a second output leg. The splitter device further includes a third splitter having an input leg coupled to a second home network bandwidth, a first output leg coupled to the second conductive path, and a second output leg. The splitter device further includes a bridge circuit operatively coupled between the first conductive path and the second conductive path. The bridge circuit is configured to propagate a home network bandwidth from the first user port to the second user port and isolate the provider bandwidth from the home network bandwidth. | 07-28-2011 |
| 20110187477 | APPARATUS FOR FILTERING AN INPUT SIGNAL - A device is disclosed for filtering an input signal, by splitting the input signal into a plurality of signals. A plurality of first and second filters are arranged to filter one of the plurality of signals. The filtered plurality of signals are combined into a filtered output signal. Each one of the plurality of signals can be filtered by one of the plurality of first filter and one of the plurality of second filters. | 08-04-2011 |
| 20110215881 | Electrical Prism: A High Quality Factor Filter for Millimeter-Wave and Terahertz Frequencies - Filters and methods which may be used with millimeter-wave and terahertz frequency range are disclosed. The filter is formed as an electrical prism which may include a first lattice forming an interface with a second lattice. Each lattice may include a plurality of passive elements, such as inductors, capacitors, and the like. The first lattice may include an input disposed at an input boundary thereof, while the second lattice may include an output disposed at an output boundary thereof. Furthermore, the first and second lattices may be configured to receive a signal at the input of the first lattice, propagate the signal to the interface, and direct the signal to the outputs of the second lattice. | 09-08-2011 |
| 20110221544 | MULTIPLEXED BI-DIRECTIONAL CIRCULATOR - In the present invention, a novel multi-port microwave circuit, also known as a multiple bi-directional circulator, is designed based upon the basis of the EBG characteristic of the meta-materials. Firstly, the concept of the traditional single-layered mushroom structure is extended with the suspending microstrip line to the multi-layered structure. In this way, the multi-layered structure can reveal multi-band EBG characteristic and achieve miniaturization. Moreover, we use three sets of proposed dual-band EBG circuit to be series-connected in a ring-type structure. By using proper impedance matching, the design of the multiple bi-directional circulator is accomplished. It combines the capabilities of the diplexer, the duplexer and the circulator. The triplex bi-directional circulator can integrate three kinds of communication systems with each other, which operates at frequencies comprising GSM 1800 MHz, WiFi 2.45 GHz, and WiMAX 3.5 GHz, respectively. It is suitable for the information integration of multi-band and multi-system communication applications. | 09-15-2011 |
| 20110234334 | Power Coupler for Industrial High-Frequency Generator - The invention relates to a device for coupling individual high-frequency amplifiers (M | 09-29-2011 |
| 20110234335 | MULTIBAND SIMULTANEOUS TRANSMISSION AND RECEPTION FRONT END ARCHITECTURE - A user equipment (UE) front end (FE) that is adapted for multiband simultaneous transmission and reception is provided. The UE FE includes a first multi-filter device having a transmit (TX) band-pass filter adapted to pass a first TX signal band associated with a first radio access technology type, and a receive (RX) band-pass filter adapted to pass a second RX signal band associated with a second radio access technology type. The UE FE also includes a second multi-filter device having a TX band-pass filter adapted to pass a second TX signal band associated with the second radio access technology type and an RX band-pass filter adapted to pass the first RX signal band associated with the first radio access technology type. The first radio access technology type and the second radio access technology type are preferably long term evolution (LTE) and code division multiple access 2000 (CDMA2000), respectively, or vice versa. | 09-29-2011 |
| 20110234336 | Low Passive Inter-Modulation Capacitor - A high power, low passive inter-modulation capacitor is presented, which is formed using metal clad substrates, which are broad-side coupled through a thin air gap. Each substrate may include metal layers affixed on both sides which are electrical coupled together to form a single capacitor plate, or each substrate may have only a single metal layer on the surface adjacent to the air gap. The capacitor has particular application in low cost RF and microwave filters, which may be used in communication equipment and communication test equipment such a diplexers, for low PIM applications. | 09-29-2011 |
| 20110254639 | DUPLEXER AND ELECTRONIC DEVICE - A ladder type filter includes series resonators connected in series between an input terminal and an output terminal, parallel resonators connected in parallel between the input terminal and the output terminal, a resonator connected in series with the series resonators between the input terminal and the output terminal, the resonator having a resonance frequency lower than resonance frequencies of the series resonators, and an inductor connected in parallel with the resonator. According to the present ladder filter, signals having frequencies away from the pass band can be suppressed by an attenuation pole formed by the inductor. it is further possible to suppress the insertion loss in the pass band by the resonator. | 10-20-2011 |
| 20110279193 | DUPLEXER MODULE - A duplexer module that prevents degradation of isolation between signal lines includes transmission filters, reception filters, phase adjusting circuits, and a multilayer substrate. The transmission filters and the reception filters are constituted as separate discrete components. The multilayer substrate includes filter mount terminals to which the transmission filters are mounted, and filter mount terminals to which the reception filters are mounted. The filter mount terminals are arranged along an upper side of the multilayer substrate, and the filter mount terminals are arranged along a lower side of the multilayer substrate. | 11-17-2011 |
| 20110291772 | Inductive Circuit Arrangement - A bond wire circuit includes at least three bond wires arranged to split an input signal into two output signals. In connection with various example embodiments, bond wires are arranged in a generally parallel manner to mitigate magnetic coupling and related issues for splitting an input signal and providing each of split signals to an amplifier. The bond wires are connected by capacitive circuits that facilitate the splitting, and in some applications, additional capacitive (to ground/reference) and load circuits to further facilitate the splitting of the input signals for specific amplifier circuit implementations, and applications to various loads. In some implementations, the input signals are split in equal or arbitrary portions with frequency independent phase differences in a wide frequency band, with isolation between ports of the circuit. | 12-01-2011 |
| 20110298560 | HIGH-FREQUENCY MODULE - A high-frequency module enabling sufficient attenuation over a wide frequency range outside of a passband includes a triplexer including a combination of an LPF, a BPF, and HPFs arranged to demultiplex a signal input from a common terminal into a first communication signal, a second communication signal, and a third communication signal in different frequency bands, and to output the first, second, and third communication signals from individual terminals. The individual terminals of the triplexer are connected to respective baluns. The baluns are configured such that the respective passbands of the baluns overlap the respective frequency bands of the communication signals and the respective passbands of the triplexer, and the attenuation of the baluns at the attenuation poles of the triplexer is −3 dB or greater. This configuration provides high attenuation in the rebound bands of the attenuation poles. | 12-08-2011 |
| 20120081192 | BRANCHING DEVICE - In a branching device, an LPF includes a first inductor arranged such that some conductor layers from among conductor layers are wound in a clockwise direction, and a second inductor arranged such that a conductor layer from among the conductor layers is wound in an counterclockwise direction. In addition, an HPF includes a third inductor arranged such that conductor layers are wound in the same clockwise direction as the first inductor. Therefore, when a high-frequency signal passes through the LPF, a winding direction is reversed. In addition, when a high-frequency signal passes through the HPF, a winding direction is reversed. | 04-05-2012 |
| 20120112853 | TUNABLE FILTER, TUNABLE DUPLEXER AND MOBILE COMMUNICATION TERMINAL USING THE SAME - A tunable filter and a tunable duplexer are provided, both of which comprise an input terminal, an output terminal, four fixed capacitors, three variable capacitors and three fixed coils; wherein the variable capacitors are grounded at one end and, at the other end, connected to the fixed coils to form three sets of series-connected LC circuit; wherein the connecting points of the three sets of series-connected LC circuit, the input terminal and the output terminal are connected with the fixed capacitors, respectively. | 05-10-2012 |
| 20120126912 | DUPLEXER - A duplexer includes: an insulation substrate having an upper surface on which a transmission filter and a reception filter are mounted, and a lower surface on which a foot pad layer electrically connected to the transmission filter and the reception filter is formed; a transmission pad provided on the upper surface and electrically connected to the transmission filter; a reception pad provided on the upper surface and electrically connected to the reception filter, a ring-shaped electrode provided on the upper surface and configured to surround the transmission pad and the reception pad; a ground foot pad included in the foot pad layer, and a via interconnection configured to electrically interconnect the ring-shaped electrode and the ground foot pad and to be provided in the ring-shaped electrode in a section along a shorter one of routes that connect the transmission pad and the reception pad to each other along the ring-shaped electrode. | 05-24-2012 |
| 20120146742 | DIPLEXED TX FILTER AND RF SWITCH WITH INTERMODULATION SUPPRESSION - Disclosed is a diplexed transmit (TX) filter and RF switch for suppressing third order intermodulation (IM3) products. Included are first and second duplexers each having a receive (RX) port, a TX port, and an RX/TX port. Also included are first and second power splitter/combiners each having first, second, and third terminals. Further included are first, second, and third phase shift networks. The first power splitter/combiner's first terminal is coupled to the first duplexer's TX port and a first switch segment is coupled between the first duplexer's RX/TX port and the first terminal of the second coupler. The first phase shift network is coupled to the second duplexer's TX port and a second switch segment in series with the second phase shift network is coupled between the second duplexer's RX/TX port and second coupler's second terminal. The third phase shift network is coupled to the second duplexer's RX terminal. | 06-14-2012 |
| 20120249263 | SAME-BAND COMBINER USING DUAL-BANDPASS CHANNEL FILTERS - Various embodiments relate to an apparatus and related method for transmission and reception of a plurality of a carrier signals comprising one or more dual-band channels through a same-band combiner. A device such as a base station may include a same-band combiner that comprises a plurality of dual-bandpass filters and a combining element to transmit and receive the carrier signal. Each of the dual-bandpass filters may transmit and receive a channel, with each dual-bandpass filter including separate reception and transmission passbands for the separate frequencies in the dual-band channel. The combining element may separate and combine the one or more dual-band channels, with each of the dual-bandpass filters connected in parallel processing separate dual-band channels. | 10-04-2012 |
| 20120256701 | NOVEL TRIPLEXER TOPOLOGY - An apparatus comprising a first filter, a second filter, a third filter, and a fourth filter. The first filter may comprise a low pass filter having a first bandwidth and configured to present a first output signal in response to an input signal received at an input port of the apparatus. The second filter may comprise a high pass filter having a second bandwidth and configured to present a second output signal in response to the input signal received at the input port of the apparatus. The third filter may comprise a low pass filter having a third bandwidth and configured to present a third output signal in response to the second output signal. The fourth filter may comprise a high pass filter having a fourth bandwidth and configured to present a fourth output signal in response to the second output signal. | 10-11-2012 |
| 20120293275 | ELECTRICAL FILTER - An electrical filter for filtering an electrical signal, the filter having a transmission characteristic comprising a band edge at a band edge transition frequency, the filter comprising a circulator having a first circulator port for receiving a signal to be filtered, the circulator being adapted to transfer a signal received at the first circulator port to a second circulator port and being further adapted to transfer a signal received at the second circulator port to a third circulator port; and, a reflection mode filter connected to the second port; the reflection mode filter comprising a filter network comprising at least one resonator, the filter network having a network input connected to the second circulator port; and, a further resonator connected to the network input, the further resonator being arranged to provide an extracted pole providing a transmission zero closest to the band edge transition frequency; wherein the further resonator has a high Q compared to the low Q of at least one of the at least one resonator of the filter network. | 11-22-2012 |
| 20130038404 | Duplex Filter with Recessed Top Pattern and Cavity - A duplex filter includes a block of dielectric material with top, bottom, and side surfaces and first and second spaced-apart sets of through-holes. A pair of outside walls and a center wall extend outwardly from the top surface. A pattern of metallized areas is defined on the top surface of the block including first and second electrodes that extend on the pair of outside walls respectively and third and fourth electrode antennae that extend on the center wall. The block may be two separate blocks coupled together to form an interior layer of metallization separating the first and second sets of through-holes and the center wall separates respective transmit and receive portions of the pattern of metallized areas. | 02-14-2013 |
| 20130063224 | ELECTRONIC COMPONENT - An electronic component includes: a first circuit connected to a first common terminal for inputting/outputting a first signal set, a second common terminal for inputting/outputting a second signal set having a frequency higher than the first signal set, and a third common terminal for being connected to an antenna; and a second circuit connected in parallel to the first circuit between the first and second common terminals, wherein the first circuit includes a first filter transmitting the first signal set and reflecting the second signal set, and a second filter transmitting the second signal set and reflecting the first signal set, the third common terminal is located between the first and second filters, and the second circuit reflects a first transmission signal and a second transmission signal, transmits parts of the first and second transmission signals, and inverts phases of the parts of the first and second transmission signals. | 03-14-2013 |
| 20130069740 | COMMUNICATION NETWORK - In a communication network having a first electronic control unit, a second electronic control unit, a transmission path connecting them, and a third electronic control unit connected to a branch path and communicatable with the first and second electronic control units that are each terminated with a termination circuit designed in accordance with a characteristic impedance of the transmission path, it is configured to comprise a connector that is connected to a connection point mounted on a circuit board in which the third electronic control unit is installed so that the third control unit is connected to the branch path via the connector and a conducting wire for removing a waveform distortion connected to the branch path via the connector at one end. | 03-21-2013 |
| 20130278350 | COMPOSITE COMPONENT - A circuit substrate on which a duplexer is mounted includes a substrate body. First, second and third external electrodes are provided on a first main surface of the substrate body. Fourth, fifth and sixth external electrodes are provided on a second main surface of the substrate body. First, second and third signal paths connect the first, second and third external electrodes to the fourth, fifth and sixth external electrodes, respectively. First and second ground conductors are embedded in the substrate body, and overlap with a mounting area so as to contain the mounting area where the duplexer is mounted, in a planar view seen from the z-axis direction. The first, second and third signal paths extend from the inside of the mounting area to the outside of the mounting area between the first main surface and the second ground conductor. | 10-24-2013 |
| 20130285764 | RF FRONT-END WITH ON-CHIP TRANSMITTER/RECEIVER ISOLATION USING A GYRATOR - An RF front-end with on-chip transmitter/receiver isolation using a gyrator is presented herein. The RF front end is configured to support full-duplex communication and includes a gyrator and a transformer. The gyrator includes two transistors that are configured to isolate the input of a low-noise amplifier (LNA) from the output of a power amplifier (PA). The gyrator is further configured to isolate the output of the PA from the input of the LNA. The gyrator is at least partially or fully capable of being integrated on silicon-based substrate. | 10-31-2013 |
| 20130335163 | METHODS AND APPARATUSES FOR IMPLEMENTING VARIABLE BANDWIDTH RF TRACKING FILTERS FOR RECONFIGURABLE MULTI-STANDARD RADIOS - A variable bandwidth filter comprises a first filter branch in parallel with a second filter branch. The first filter branch comprises a first resistance in series with an input and a first output, and N parallel paths across the first output, each path comprising a corresponding capacitor in series with a corresponding switch and a common terminal. The second filter branch comprises a second resistance in series with the input and a second output, and N parallel paths across the second output, each path comprising an RC network in series with a switch and a common terminal. A clock tunes the first and second filter branches to a center frequency by controlling the switches of the first and second filter branches. A combiner produces a difference signal comprising a difference between the output of the first filter branch and the output of the second filter branch to provide a filter output having an adjustable bandwidth with reference to a center frequency. The bandwidth is adjusted by changing a value of at least one resistor or at least one capacitor in one or more of the first filter branch or the second filter branch. | 12-19-2013 |
| 20140035699 | Combined Network Switching and Filter System and Method - A switchable filter and diplexer circuit includes a plurality of bandpass filters having passbands for the frequency bands in which communication across a communication channel is desired and a plurality of diplexers, the diplexers having a plurality of passbands. A plurality of switches are provided to select one of the bandpass filters or diplexers from among the plurality of bandpass filters and diplexers for communication on a communication channel. An additional switching capability is provided to select a first passband of a given diplexer when a second passband of that diplexer is selected by the plurality of switches. | 02-06-2014 |
| 20140035700 | Cascaded Diplexer Circuit - A cascaded diplexer to create a cascaded diplexer leg with selectable passbands has a cascaded diplexer circuit. The diplexer circuit has a plurality of first bandpass filters, each having a passband. The diplexer circuit has a second bandpass filter having a passband and two terminals, coupled in series with a first bandpass filter. First and second switches are coupled in series with the second bandpass filter and the first bandpass filter, the first and second switches being configured to selectably switch the second bandpass filter into the circuit. The passband of the second bandpass filter is chosen to limit the passband of the first bandpass filters, such that when the second bandpass filter is switched into the circuit, the passband of the diplexer leg is reduced. The passband of the second bandpass filter may be a subset of, or overlaps with, the passband of the first bandpass filter. | 02-06-2014 |
| 20140043112 | DUPLEXER AND CIRCUIT MODULE INCLUDING THE SAME - In a duplexer, a common terminal is arranged in a central region of a back surface of a main body of the duplexer, a transmission terminal and a reception terminal are arranged on a virtual line that is parallel or substantially parallel with one side of the back surface of the main body and that passes through the common terminal such that the common terminal is sandwiched between the transmission terminal and the common terminal. By arranging a plurality of the duplexers such that the transmission terminals are aligned and the reception terminals are aligned, the common terminals, the transmission terminals, and the reception terminals provided on the respective duplexers are not spaced apart from one another. | 02-13-2014 |
| 20140055210 | TUNABLE NOTCH FILTERING IN MULTI-TRANSMIT APPLICATIONS - A radio frequency (RF) communication device comprises a first signal propagating circuit and a second signal propagating circuit, which together enables simultaneous transmission. The first signal propagating circuit is configured with a first tunable notch filter within a first transmit path and the second signal propagating circuit is configured with a second tunable notch filter within a second transmit path. A controller is communicatively coupled to a respective first tuning component and second tuning component of the tunable notch filters. The controller selectively tunes at least one of the tunable notch filters during signal propagation to produce a specific combined notch filtering response that reduces a level of IMD on at least one receive carrier frequency of at least one propagating signal. Aspects of the disclosure also provide a method for making the communication device. | 02-27-2014 |
| 20140176256 | BASE STATION RF DUPLEXER, RF MODULE, AND RF SYSTEM - The present disclosure relates to telecommunication, and in particular, to a base station Radio Frequency (RF) duplexer, an RF module, and an RF system. A base station RF apparatus provided herein includes: an enclosure, an intermediate RF processing unit, and a duplexer. The enclosure is located on the duplexer; the intermediate RF processing unit is located inside a cavity enclosed by the enclosure and the duplexer, or on the duplexer; a duplexer cavity and a heat dissipation part exist on the surface of the duplexer; the opening of the duplexer cavity is opposite to or against the enclosure; the heat dissipation part is designed to dissipate heat of the intermediate RF processing unit; and the duplexer is integrally molded. The foregoing technical solution requires no external fasteners, reduces the time of production and assembly. In addition, waterproof design and shielding design are not required, and thus improves the reliability. | 06-26-2014 |
| 20140197902 | DIPLEXER DESIGN USING THROUGH GLASS VIA TECHNOLOGY - A diplexer includes a substrate having a set of through substrate vias. The diplexer also includes a first set of traces on a first surface of the substrate. The first traces are coupled to the through substrate vias. The diplexer further includes a second set of traces on a second surface of the substrate that is opposite the first surface. The second traces are coupled to opposite ends of the set of through substrate vias. The through substrate vias and the traces also operate as a 3D inductor. The diplexer also includes a capacitor supported by the substrate. | 07-17-2014 |
| 20140197903 | SIGNAL SEPARATION DEVICE - A signal separation device is a duplexer in which a reception frequency band is located at higher frequencies than a transmission frequency band. A series arm of a ladder transmission filter includes a plurality of series arm resonators, and parallel arms respectively include parallel arm resonators. The parallel arm resonators include the parallel arm resonators having resonant frequencies lower than those of the series arm resonators and the parallel arm resonator that has a resonant frequency which is located within the reception frequency band and which is higher than the resonant frequency of the series arm resonators and that has a lower capacitance than the series arm resonators and the parallel arm resonators. | 07-17-2014 |
| 20140232481 | POLAR-TYPE LOW PASS FILTER AND DEMULTIPLEXER EQUIPPED THEREWITH - A polar-type low pass filter includes a low pass filter portion and first, second and third ground conductors, in a laminated body. The low pass filter portion includes parallel resonant circuits including first, second, third and fourth capacitors and inductors, in a series arm, and at least capacitors in a parallel arm thereof. Pattern conductors configuring the first, second, third and fourth capacitors face the first ground conductor and so forth, in a z-axis direction. | 08-21-2014 |
| 20140300432 | BRANCHING CIRCUIT AND RF CIRCUIT MODULE - A branching circuit includes a transmission filter and a reception filter. The transmission filter is connected between a transmission signal input terminal and an antenna connection terminal. The reception filter is connected between the antenna connection terminal and a reception signal output terminal in series together with a first phase shift circuit and a second phase shift circuit. A first amplitude adjustment circuit and a second amplitude adjustment circuit are connected in series between the antenna connection terminal and the reception signal output terminal. A junction point between the first amplitude adjustment circuit and the second amplitude adjustment circuit is connected to a junction point between the first phase shift circuit and the second phase shift circuit. The first and second phase shift circuits adjust the phase of a transmission signal that leaks to the reception side and that is to be canceled out. The first and second amplitude adjustment circuits adjust the amplitude of the transmission signal that is to be canceled out. | 10-09-2014 |
| 20140327496 | TUNABLE DIPLEXERS IN THREE-DIMENSIONAL (3D) INTEGRATED CIRCUITS (IC) (3DIC) AND RELATED COMPONENTS AND METHODS - Tunable diplexers in three-dimensional (3D) integrated circuits (IC) (3DIC) are disclosed. In one embodiment, the tunable diplexer may be formed by providing one of either a varactor or a variable inductor in the diplexer. The variable nature of the varactor or the variable inductor allows a notch in the diplexer to be tuned so as to select a band stop to eliminate harmonics at a desired frequency as well as control the cutoff frequency of the pass band. By stacking the elements of the diplexer into three dimensions, space is conserved and a variety of varactors and inductors are able to be used. | 11-06-2014 |
| 20140340169 | REDUCED SIZE CAVITY FILTER FOR PICO BASE STATIONS - An improved microwave cavity filter used in cellular communication systems such as base stations is disclosed. The cavity filter has a conductive housing forming a cavity therein and a hollow conductive resonator configured in the cavity with a folded hat shaped upper portion. A tuning screw extends from the top cover of the housing into the top folded hat portion of the hollow resonator to fine tune the resonator. The resonator also may preferably include two different diameter sections providing a first high impedance section with smaller diameter and a second lower impedance section with a larger diameter configured at an upper end of the resonator. This configuration provides a significantly smaller cavity height for a given power handling capability. The resonator is preferably of constant thickness allowing low cost stamping or other forming techniques to be used in forming the resonator. | 11-20-2014 |
| 20140354372 | SYSTEMS FOR REDUCING MAGNETIC COUPLING IN INTEGRATED CIRCUITS (ICS), AND RELATED COMPONENTS AND METHODS - Systems for reducing magnetic coupling in integrated circuits (ICs) are disclosed. Related components and methods are also disclosed. The ICs have a plurality of inductors. Each inductor generates a magnetic flux that has a discernible axis. To reduce magnetic coupling between the inductors, the flux axes are designed so as to be non-parallel. In particular, by making the flux axes of the inductors non-parallel to one another, magnetic coupling between the inductors is reduced relative to the situation where the flux axes are parallel. This arrangement may be particularly well suited for use in diplexers having a low pass and a high pass filter. | 12-04-2014 |
| 20140361848 | TUNABLE RF FILTER STRUCTURE FORMED BY A MATRIX OF WEAKLY COUPLED RESONATORS - RF filter structures are disclosed that may have multiple filter paths, which are provided by weakly coupled resonators. The filter paths may be interconnected so that additional filter paths may be realized between input and output terminals of the RF filter structures. In this manner, the weakly coupled resonators from the filter paths may be arranged in a matrix. In one embodiment, an RF filter structure includes a first filter path and a second filter path. The first filter path includes (at least) a first pair of weakly coupled resonators while a second filter path that includes (at least) a second pair of weakly coupled resonators. To interconnect the first filter path and the second filter path, a cross-coupling capacitive structure is electrically connected between the first filter path and the second filter path. As such, an additional filtering path may be realized through the interconnection provided by the cross-coupling capacitive structure. | 12-11-2014 |
| 20140361849 | TUNABLE RF FILTER BASED RF COMMUNICATIONS SYSTEM - RF communications circuitry, which includes a first RF filter structure, is disclosed. The first RF filter structure includes a first tunable RF filter path and a second tunable RF filter path. The first tunable RF filter path includes a pair of weakly coupled resonators. Additionally, a first filter parameter of the first tunable RF filter path is tuned based on a first filter control signal. A first filter parameter of the second tunable RF filter path is tuned based on a second filter control signal. | 12-11-2014 |
| 20150028964 | PACKAGE STRUCTURE FOR DUPLEXER, METHOD OF MANUFACTURING THE SAME AND ELECTRONIC DEVICE WITH THE SAME - A package structure includes a printed circuit board (PCB), a duplexer, a first dam, a second dam and a cover. The duplexer includes a transmission filter and a reception filter and is electrically connected with the PCB. The first dam is located on a surface of the PCB, and in cooperation with the PCB forms a first receptacle receiving the transmission filter. The second dam is located on the surface of the PCB, and in cooperation with the PCB forms a second receptacle receiving the reception filter. The cover is fixed with top parts of the first dam and the second dam to seal the transmission filter and the reception filter. A method of manufacturing plural such package structures is also provided. | 01-29-2015 |
| 20150028965 | DIPLEXER INCLUDING TWO BANDPASS FILTERS - A diplexer includes a first bandpass filter provided between an input terminal and a first output terminal and selectively passing a signal in a first frequency band, and a second bandpass filter provided between the input terminal and a second output terminal and selectively passing a signal in a second frequency band. The first bandpass filter includes a plurality of first resonators. The second bandpass filter includes a second resonator and a series resonant circuit. The series resonant circuit is composed of a capacitor provided between the input terminal and the second resonator, and an inductance component of a line that connects the input terminal and the second resonator via the capacitor. | 01-29-2015 |
| 20150035617 | COOPERATIVE TUNABLE RF FILTERS - RF communications circuitry, which includes a first tunable RF filter and a second tunable RF filter, is disclosed. The first tunable RF filter is coupled to the second tunable RF filter. The RF communications circuitry operates in one of a first operating mode and a second operating mode. During the first operating mode, the second tunable RF filter receives and filters an upstream RF signal to provide a filtered RF signal. Further, during the first operating mode, the first tunable RF filter augments a frequency response of the second tunable RF filter. | 02-05-2015 |
| 20150091669 | LOW PASS FILTER HAVING ATTENUATION POLE AND WAVE SPLITTER - A low pass filter having an attenuation pole includes at least inductors disposed on a series arm which connects an input terminal and an output terminal. The inductors are wound inductors mounted on a first surface of a multilayer body. A winding axis of one of the wound inductors is perpendicular or substantially perpendicular to a winding axis of the other one of the wound inductors. | 04-02-2015 |
| 20150130558 | FILTER DEVICE AND DUPLEXER - A filter device includes a band pass filter connected between a first signal terminal and a second signal terminal and an LC circuit connected in parallel with the band pass filter. The LC circuit has anti-resonant characteristics that make the LC circuit be open at a pass band of the band pass filter, and make attenuation in a specified frequency band outside of the pass band of the band pass filter higher than in a case in which the LC circuit is not connected, as a result of the LC circuit being connected. | 05-14-2015 |
| 20150303889 | APPARATUS AND METHOD FOR FILTERING SINGALS IN A RECEIVER - An apparatus and method for filtering a signal is described. The apparatus includes a first singly terminated filter that filters a signal in a first frequency range, and a second singly terminated filter that filters the signal in a second frequency range, the inputs of the filters being connected together, wherein an element of the first filter is coupled to an additional element to form a frequency response transmission zero in a stopband frequency range of the first filter. The method includes receiving a signal, the signal containing content from a first source in a first frequency range and content from a second source in a second frequency range different than the first range, applying filtering, and applying filtering to generate a second output signal, using filters that include a singly terminated filter section with additional circuit elements to form a transmission frequency zero in the stopband frequency range. | 10-22-2015 |
| 20150303891 | APPARATUS AND METHOD FOR FILTERING A SIGNAL - A simplified filter structure, and method thereof, for filtering signals received on a network are provided. The present disclosure is directed to a simplified filter structure, arranged as a dual unbalanced cascade diplexer for a plurality of received signals, including satellite, terrestrial, and home networking signals, e.g., Multimedia Over Cable Alliance (MoCA) signals. The simplified filter structure is designed such that signals within a certain predetermined frequency range are passed, while the impedance is matched in the stopband frequency range both above and below the frequency range of the passed signals. | 10-22-2015 |
| 20150303892 | TUNABLE DUPLEXING CIRCUIT - A tunable duplexer circuit is described, wherein the frequency response as well as bandwidth and transmission loss characteristics can be dynamically altered, providing improved performance for transceiver front-end applications. The rate of roll-off of the frequency response can be adjusted to improve performance when used in duplexer applications. A method is described where the duplexer circuit characteristics are optimized in conjunction with a specific antenna frequency response to provide additional out-of-band rejection in a communication system. Dynamic optimization of both the duplexer circuit and an active antenna system is described to provide improved out-of-band rejection when implemented in RF front-end circuits of communication systems. Other features and embodiments are described in the following detailed descriptions. | 10-22-2015 |
| 20150381144 | BULK ACOUSTIC RESONATOR COMPRISING ALUMINUM SCANDIUM NITRIDE - A method of forming a film bulk acoustic resonator structure comprises forming a first electrode on a substrate, forming a piezoelectric layer on the first electrode, and forming a second electrode on the piezoelectric layer. The first and second piezoelectric layers are formed by a sputter deposition process using at least one sputter target comprising a combination of scandium and aluminum. | 12-31-2015 |
| 20160013538 | Multi-Mode Filter with Resonators and Connecting Path | 01-14-2016 |
| 20160036409 | PRINTED DIPLEXER - A printed diplexer is printed on a PCB, having at least two input terminals respectively connected to at least two end portions thereof, having the output terminal connected at a center portion thereof, and configured to output a signal inputted from the at least two input terminals to the output terminal. | 02-04-2016 |
| 20160072470 | SPLITTER CIRCUIT AND FRONT-END CIRCUIT - A splitter circuit includes a first branch circuit and a second branch circuit. Each branch circuit includes a capacitor, an inductor and a resistor. A first end of the capacitor is configured to receive RF signals. A first end of the inductor is coupled to a second end of the capacitor. The second end of the inductor is coupled to ground. The resistor is coupled to the second end of the capacitor to output RF signals. The resistor in the first branch circuit and the resistor of the second branch circuit respectively output RF signals to different devices. | 03-10-2016 |
| 20160112025 | MULTIPLEXER - A multiplexer includes: a first filter connected between a common terminal and a first terminal; a second filter connected between the common terminal and a second terminal, and having a passband lower in frequency than a passband of the first filter; and a resonant circuit including: a first inductor and a capacitor connected in series between a first end and a second end of the resonant circuit, the first end being coupled to a node at which the common terminal diverges into the first filter and the second filter, the second end being coupled to the first filter, and a second inductor connected in parallel to the first inductor and the capacitor between the first end and the second end, wherein the passband of the first filter is higher in frequency than an antiresonant frequency of the resonant circuit. | 04-21-2016 |
| 20160126922 | MULTIPLEXERS USING WEAKLY-COUPLED NETWORKS IN RF FRONT END CIRCUITRY - Multiplexing circuitry is disclosed that includes filtering circuitry, which provides a first transfer function between a common port and a first port and a second transfer function between the common port and a second port. The first transfer function and second transfer function provide a first passband and a second passband, respectively. The first transfer function also has a stopband provided within the second passband of the second transfer function due to the filtering circuitry including a first parallel resonant circuit provided in series in a first filter path being weakly coupled to a second parallel resonant provided in shunt with respect to a second filter path. The weak coupling between the first parallel resonant circuit and the second parallel resonant circuit thus naturally provides a stopband in the first transfer function within the second passband of the second transfer function. | 05-05-2016 |
| 20160126929 | RADIO FREQUENCY FILTERING CIRCUITRY WITH RESONATORS - RF multiplexer circuitry includes a first signal path coupled between a first intermediate node and a common node, a second signal path coupled between a second intermediate node and the common node, first resonator circuitry coupled between the first signal path and ground, and second resonator circuitry coupled between the second signal path and ground. The first resonator circuitry is configured to allow signals within a first frequency pass band to pass between the first intermediate node and the common node, while attenuating signals outside of the first frequency pass band. The first resonator circuitry includes a first LC resonator. The second resonator circuitry is configured to allow signals within a second frequency pass band to pass between the second intermediate node and the common node, while attenuating signals outside of the second frequency pass band. | 05-05-2016 |
| 20160156327 | NON-RECIPROCAL, TUNABLE NOTCH AMPLIFYING RF FRONT-ENDS BASED ON DISTRIBUTEDLY MODULATED CAPACITORS (DMC) | 06-02-2016 |
| 20160182006 | High-Selectivity Low-Loss Duplexer | 06-23-2016 |
| 20160204756 | CONVERTING A SYMMETRICAL INPUT SIGNAL OF A MAGNETIC RESONANCE ARRANGEMENT INTO AN ASYMMETRICAL OUTPUT SIGNAL | 07-14-2016 |
| 20160204758 | TUNABLE DIPLEXERS IN THREE-DIMENSIONAL (3D) INTEGRATED CIRCUITS (IC) (3DIC) AND RELATED COMPONENTS AND METHODS | 07-14-2016 |
