Class / Patent application number | Description | Number of patent applications / Date published |
343722000 | With lumped reactance filter in active antenna | 56 |
20080204337 | PORTABLE ANTENNA DEVICE - A portable antenna device includes a circuit board having a ground pattern, an antenna including a spirally wound external element and a spirally wound internal element coaxially disposed inside the external element at a distance from the first element so that one of the external and internal elements forms a signal wire and the other forms a ground wire. The circuit board includes plural passive elements each of which has a different impedance and a switch unit that selectively connects the antenna with the ground via one of the passive elements to provide a resonance characteristic of radio wave that has a frequency deference from a resonance characteristic provided by any other passive element. | 08-28-2008 |
20080231526 | Antenna Assembly and Wireless Unit Employing It - An object of the invention is to provide an antenna apparatus whose directional characteristic can be switched 90 degrees conforming to the communication mode at the same time as the frequency band can be switched in response to the communication mode for application to a multiband radio for covering different communication modes such as voice communications and data communications, and a radio using the antenna apparatus. | 09-25-2008 |
20080246674 | Antenna Device and Portable Radio Communication Device Comprising Such Antenna Device - The present invention comprises an antenna device for a portable radio communication device operable in at least a first and a second frequency band. The antenna device comprises a first electrically conductive radiating element having a feeding portion connectable to a feed device (RF) of the radio communication device for feeding and receiving radio frequency signals, a first ground plane portion arranged at a distance from the first radiating element, a second ground plane portion, and a controllable switch arranged between the first and second ground plane portion for selectively interconnecting or disconnecting the first and second ground plane portion. | 10-09-2008 |
20080258983 | Saw Filter Comprising a Broadband Band-Stop Filter - A band-stop filter is described herein. The band-stop filter includes a piezoelectric substrate and a plurality of surface wave element (SAW) impedance elements on the substrate. The band-stop filter also includes at least one series branch comprising at least one series resonator having a finger period, and a plurality of parallel branches connected electrically in parallel with the series branch, each parallel branch including at least one parallel impedance element comprising an interdigital transducer and having a finger period. The average finger period of the at least one series resonator is greater than the average finger period of the at least one parallel impedance element. | 10-23-2008 |
20080272970 | COMMUNICATIONS ASSEMBLY AND ANTENNA RADIATOR ASSEMBLY - A radio communications assembly ( | 11-06-2008 |
20080278389 | Multi-band antenna - A multi-band antenna is arranged on a housing with a first surface, a second surface opposite to the first surface, and a third surface connecting the first and second surfaces, which has a first radiating conductor and a parasitic element formed as an elongated shape and arranged on the first surface. A trap circuit connects the first radiating conductor and the parasitic element. A ground portion is arranged on the second surface. A second radiating conductor is arranged on the third surface and spaced from the first radiating conductor and the ground portion, which is formed as an elongated shape. A feeding conductor with a feeding point connects the first and second radiating conductors. The multi-band antenna obtains a low frequency band through the cooperation of the first radiating, the parasitic element and the trap circuit, and a high frequency band through the second radiating conductor and the parasitic element. | 11-13-2008 |
20080278390 | Ultra Wide Band Notch Antenna Assembly for Rf Communication Equipment - Abstract: A planar antenna assembly (AA) for an RF communication module, comprises i) a conductive plate having a first linear side of a first length and in which is defined a first notch (N | 11-13-2008 |
20080303729 | Multiband antenna system and methods - An antenna system internal to a radio device, the system comprising separate antennas and having separate operating bands. The system is implemented as decentralized in a way that each antenna is typically based on a small-sized chip component ( | 12-11-2008 |
20090002248 | Half-and Quarter-Wavelength Printed Slot Ultra-Wideband (Uwb) Antennas for Mobile Terminals - The present invention employs slot antennas to make UWB antenna and a quarter-wavelength slot UWB antenna for use in mobile terminals. The slot length, which is related to the lower resonant frequency, is about half (for the half-wavelength slot antenna) or quarter (for the quarter-wavelength slot antenna) of the wavelength, while the higher resonant frequency is related to a dimension of the tuning stub. By modifying the dimensions of the tuning stub, good impedance matching of the antenna can be achieved according to the desired operating frequency. This invention can be used for mobile terminals to transmit and receive UWB signals in the frequency range of 3.1 GHz-4.9 GHz. | 01-01-2009 |
20090009413 | Integrated Multi-Band Antenna - An integrated multi-band antenna has a first radiating conductor, a second radiating conductor spaced from the first radiating conductor, a trap element connected to the first and second radiating conductors, a third radiating conductor with a first feeding point connected to the first radiating conductor, a fourth radiating conductor connected to the second and third radiating conductors, a meandering radiating conductor having two ends which respectively connect a fifth radiating conductor with a second radiating conductor and a sixth radiating conductor parallel to the meandering radiating conductor and a ground portion arranged close to the first radiating conductor and spaced from the fifth radiating conductor. The second, third and fourth radiating conductors resonate at a first frequency bandwidth. The first, second and third radiating conductor and the trap element resonate a second frequency bandwidth. The fifth, sixth and meandering radiating conductors resonate a third and a fourth frequency bandwidths. | 01-08-2009 |
20090213020 | Antenna With Dual Band Lumped Element Impedance Matching - An antenna includes a first antenna element and a second antenna element. The first antenna element and the second antenna element are both configured to receive signals in a first band of frequencies and in a second band of frequencies. Frequencies in the second band of frequencies are greater than frequencies in the first band of frequencies. A first impedance matching circuit, coupled to the first antenna element, includes a first plurality of filters having a first shared component. A second impedance matching circuit, coupled to the second antenna element, includes a second plurality of filters having a second shared component. A feed network circuit is coupled to the first impedance matching circuit and to the second impedance matching circuit and has a combined output corresponding to the signals received by the first antenna element and a second antenna element. | 08-27-2009 |
20090231220 | ADAPTIVE TUNABLE ANTENNAS FOR WIRELESS DEVICES - Techniques for adjusting one or more antenna parameters to optimize the performance of a wireless device are disclosed. In an embodiment, a variable antenna match is provided with a control signal for selecting a preferred antenna match setting. The preferred antenna match setting may correspond to the setting having a best signal quality metric. In a further embodiment, a variable antenna electrical length module is provided with a control signal for selecting a preferred antenna electrical length. Further techniques for accommodating multiple antennas are disclosed. | 09-17-2009 |
20090256762 | RFID ANTENNA WITH QUARTER WAVELENGTH SHUNT - An RFID antenna can include a shunt across a connector region of a length in a range of 1/6 to 1/3 of the operating wavelength of the RFID antenna. This can improve the operating characteristics of the RFID antenna. | 10-15-2009 |
20090289861 | RADIO FREQUENCY COMMUNICATION DEVICES AND METHODS - One embodiment relates to a circuit for efficient wireless communication. The circuit includes an antenna feed and a plurality of communication paths stemming from the antenna feed, where different communication paths are associated with different frequency bands. The circuit also includes a shunt coupled to the antenna feed and adapted to selectively divert power from the antenna feed as a function of shunt control signal. Other methods and systems are also disclosed. | 11-26-2009 |
20100001913 | BROADBAND ANTENNA - The present invention relates to a broadband antenna for at least six frequency bands provided on an isolating antenna support structure comprising. The antenna comprises a low band branch and a high band branch coupled to a substantially rectangular ground plane provided on a PCB. The coupling between the ground plane and the low band branch is a capacitive coupling and has a vertical distance of 3-7 mm there in between. | 01-07-2010 |
20100019979 | Tulip antenna with tuning stub - The tulip antenna has two orthogonally intersecting conductive plates. Each intersecting plate has two ends, and one of these ends is smoothly tapered. The intersecting plates intersect such that the tapered end of both plates together form a tapered side when the intersecting plates intersect. An inner conductor of a coaxial cable is connected to the two intersecting plates at the tapered side of the intersecting plates. The inner conductor and the surrounding insulator pass through a tuning stub and then through a metallic ground plate. The tuning stub is connected to the ground plate. An aperture in the ground plate is sized such that the insulator can pass through it, just as the insulator can pass through the tuning stub. The tuning stub increases the upper frequency limit over which the antenna operates. The outer conductor of the coaxial cable is attached to the ground plate. | 01-28-2010 |
20100090917 | Electrical Component with a Front-End Circuit - An electrical component with a diversity front-end circuit that is exclusively designed to transmit received signals is disclosed. The diversity front-end circuit is capable of receiving incoming signals in at least two frequency bands simultaneously. The diversity front-end circuit includes at least two receiving paths coupled to a diversity antenna, wherein the received signals of the respective frequency band are transmitted in each receiving path. | 04-15-2010 |
20100123634 | Broadband antenna and an electronic device having the broadband antenna - A broadband antenna for wireless signal transmission of an electronic device comprises a base board, a radiating element, a grounding element, a shorting element, and a feeding point. The radiating element, the grounding element, and the shorting element are disposed on the base board. The radiating element comprises a first slot and a second slot. The second slot is connected to the first slot substantially. The first slot and the second slot are used to adjust the operating band of the broadband antenna. The grounding element is used to ground the broadband antenna. The shorting element is used to connect the radiating element and the grounding element. The feeding point is disposed between an edge of the base board and the shorting element, and the horizontal extended range of the first slot does not exceed the position of the feeding point. | 05-20-2010 |
20100123635 | Tunable Metamaterial Antenna Structures - Apparatus and techniques that provide tuning elements in antenna devices to tune frequencies of the antenna devices, including composite right and left handed (CRLH) metamaterial (MTM) antenna devices. Examples of the tuning elements for CRLH MTM antenna devices include feed line tuning elements, cell patch tuning elements, meandered stub tuning elements, via line tuning elements, and via pad tuning elements tuning elements that formed near corresponding antenna elements such as the feed line, cell patch, meander stub, via line and via pad, respectively. | 05-20-2010 |
20100149057 | Multiband antenna system and methods - An antenna system internal to a radio device, the system comprising separate antennas and having separate operating bands. The system is implemented as decentralized in a way that each antenna is typically based on a small-sized chip component ( | 06-17-2010 |
20100164819 | MULTIBAND ANTENNA INCLUDING ANTENNA ELEMENTS CONNECTED BY A CHOKING CIRCUIT - Multiband antennas are disclosed that incorporate a high frequency antenna element connected to a low frequency antenna element by a choking circuit. The choking circuit couples the high frequency antenna element to the low frequency antenna at a low frequency band and decouples the high frequency antenna element at a high frequency band. The connection created by the choking circuit can be a direct connection or can be an indirect connection via coupling elements that are capactively coupled to the high frequency antenna element and/or the low frequency element to increase the bandwidth of the multiband antenna. One embodiment includes a high frequency antenna element including a feed, and a low frequency antenna element connected to the high frequency antenna element via a choking circuit. In addition, the choking circuit is configured to couple the low frequency antenna element to the high frequency antenna element in a low frequency band and decouple the high frequency antenna element from the low frequency antenna element in a high frequency band. | 07-01-2010 |
20100182210 | ULTRA-WIDEBAND ANTENNA HAVING A BAND NOTCH CHARACTERISTIC - The present invention discloses an antenna for ultra-wideband (UWB) communication having a band-stop characteristic. According to an embodiment of the present invention, the UWB antenna is a patch antenna employing microstrip feeding. In order to expand a bandwidth at a low frequency band, a stub is formed in a radiating element. Furthermore, since steps are formed in a ground plane, an antenna characteristic at an intermediate frequency band can be improved and a UWB characteristic can be obtained. According to another embodiment of the present invention, the UWB antenna is a patch antenna employing microstrip feeding and has a recess formed in the ground plane, thereby implementing the UWB characteristic. The antenna of the present invention has an inverse U-shaped slot formed in the radiating element, thus implementing the band-stop characteristic at the UNII band. In addition, the antenna of the present invention has includes a ground plane having a small area and has omnidirectional radiating patterns accordingly. | 07-22-2010 |
20100188302 | MULTIPLE BAND ANTENNA - The present invention provides a multiple band antenna, including a first radiation element adapted to resonate at a first resonant frequency band by employing a resonant length, which is reduced by a coupling effect with a neighboring radiation element, a power feed unit coupled to one lower side of the first radiation element, a first inductor coupled in series to the other lower side of the first radiation element, a second radiation element adapted to face the first radiator to thereby obtain the coupling effect, wherein the second radiation element has a predetermined lower portion coupled to the first inductor, a second inductor having one end coupled in series to a predetermined upper portion of the second radiation element, and a third radiation element coupled to the other end of the second inductor, wherein the third radiation element operates as one radiation element together with the second radiation element and resonates at a second frequency band. | 07-29-2010 |
20100225550 | MULTIBAND ANTENNAS AND DEVICES - An apparatus includes an antenna (e.g., a monopole), a first load, and a second load. The antenna, which extends substantially along an axis, has a first end and a second end. The first load is coupled to the antenna at the first end, while the second load is coupled to the antenna between the first end and the second end. Both the first and second loads are symmetrical with reference to the axis. The apparatus is arranged to operate in at least two frequency bands, such as the AMPS band from about 824 MHz to 894 MHz and the PCS band from about 1850 MHz to 1990 MHz. | 09-09-2010 |
20100231470 | MULTIBAND COMPOSITE RIGHT AND LEFT HANDED (CRLH) SLOT ANTENNA - This application relates to slot antenna devices based on Composite Right and Left Handed (CRLH) metamaterial (MTM) structures. | 09-16-2010 |
20100245191 | MULTIPLE MODE RF TRANSCEIVER AND ANTENNA STRUCTURE - An antenna structure includes first and second antennas. The first antenna has a first geometry corresponding to a first frequency. The second antenna has a second geometry corresponding to a second frequency. The second antenna is proximal to the first antenna and utilizes electrical-magnetic properties of the first antenna to transceive signals at the second frequency. | 09-30-2010 |
20100265146 | MULTIMODE ANTENNA STRUCTURE - A multimode antenna structure is provided for transmitting and receiving electromagnetic signals in a communications device. The communications device includes circuitry for processing signals communicated to and from the antenna structure. The antenna structure includes a plurality of antenna ports for coupling to the circuitry; a plurality of antenna elements, each operatively coupled to a different one of the antenna ports; and a plurality of connecting elements. The connecting elements each electrically connect neighboring antenna elements such that the antenna elements and the connecting elements are arranged about the periphery of the antenna structure and form a single radiating structure. Electrical currents on one antenna element flow to connected neighboring antenna elements and generally bypass the antenna ports coupled to the neighboring antenna elements such that an antenna mode excited by one antenna port is generally electrically isolated from a mode excited by another antenna port at a given desired signal frequency range, and the antenna structure generates diverse antenna patterns. | 10-21-2010 |
20100302114 | ANTENNA DEVICE AND PORTABLE RADIO COMMUNICATION DEVICE COMPRISING SUCH ANTENNA DEVICE - The present invention relates to an antenna device for a portable radio communication device adapted for receiving and/or transmitting radio signals in at least a first and a second operating frequency band, said antenna device comprising a half-loop radiating element, comprising a feeding portion and a grounding portion, and arranged to operate at FM frequencies. The antenna device comprises a capacitor at said feeding portion and an inductor at said grounding portion, and said half-loop radiating element is arranged to simultaneously with FM frequencies operate at frequencies at least ten times higher than FM frequencies, wherein said capacitor is arranged to short circuit said half-loop radiating element to ground for frequencies at least ten times higher than FM frequencies and said inductor is arranged to short circuit said half-loop radiating element to ground for FM frequencies. | 12-02-2010 |
20110134002 | Capacity loaded planar antenna with short stubs - Provided is a capacity loaded planar antenna with short stubs that can be brought to a small size and a low profile, achieves wider bandwidth, and can be tuned to multiple frequencies. A capacity loaded planar antenna with short stubs that has a simple structure and can be easily manufactured includes a base plate, an antenna element disposed so as to be parallel to the base plate, a plurality of short stubs that connect the antenna element to the base plate, and a side wall formed on the end of the base plate. The capacity loaded planar antenna achieves wider bandwidth with the small size and low profiled, can be tuned to multiple frequencies by adjusting the length of the short stubs, and uses plate-shaped foldable short stubs that are integrated with the antenna element. | 06-09-2011 |
20110156970 | Folder-type Mobile Communication Device - The present invention is related to a folder-type mobile communication device. The device comprises a first dielectric substrate, a first ground plane disposed on the first dielectric substrate, a second dielectric substrate, a second ground plane disposed on the second dielectric substrate, an antenna element, a metal line, and a band-stop circuit. The antenna element is located near the first ground plane and is electrically connected to a source on the first dielectric substrate. The second ground plane is electrically connected to the first ground plane through the metal line. The band-stop circuit is located either on the first ground plane or on the second ground plane. The band-stop circuit includes a slit, a capacitive element, and an inductive element. The slit is near the metal line. The capacitive element is electrically connected to the two sides of the slit, and the inductive element is electrically connected to the two sides of the slit such that the inductive element and the capacitive element form a parallel LC resonant circuit. Therefore, the band-stop circuit generates a parallel resonance at a specified frequency. | 06-30-2011 |
20110187615 | ANTENNA APPARATUS INCLUDING MULTIPLE ANTENNA PORTIONS ON ONE ANTENNA ELEMENT OPERABLE AT MULTIPLE FREQUENCIES - An antenna apparatus includes a slit provided on an antenna element between first and second feed ports; and a series resonant circuit provided at a location along the slit, with a distance from an opening of the slit. When the antenna apparatus operates at a first isolation frequency identical to a resonance frequency of the series resonant circuit, the series resonant circuit is short-circuited, and only a section of the slit from its opening to the series resonant circuit resonates, thus providing isolation between the feed ports at the first isolation frequency. When the antenna apparatus operates at a second isolation frequency lower than the first isolation frequency, the series resonant circuit is open, and the entire slit resonates, thus providing isolation between the feed ports at the second isolation frequency. | 08-04-2011 |
20110254747 | SYSTEM FOR RADIATING RADIO FREQUENCY SIGNALS - A system that includes a phase shifter and a radiating element of an electrical circuit; wherein the phase shifter is arranged to: (a) receive, from a first lead of a feed line, a first signal that is a radio frequency (RF) signal; (b) delay the first RF signal by about 180 degrees to provide a delayed signal; and (c) provide the delayed signal to a first feeding point of the radiating element; wherein the radiating element further comprises a second feeding point that is arranged to receive from a second lead of the lead line a second signal that is a RF signal; wherein the delayed signal and the second signal are substantially in phase. The system can include or be an improved MB antenna. | 10-20-2011 |
20110260938 | Antenna and antenna assembly using same - The present invention provides an antenna for transmitting/receiving a first frequency signal and a second frequency signal. The antenna includes a first frequency antenna branch for transmitting/receiving the first frequency signal, a second frequency antenna branch separated from the first frequency antenna branch for transmitting/receiving the second frequency signal and an inductance for connecting the first and second frequency antenna branches in series with one another. The inductance is capable of preventing the first frequency signal passing through the second frequency antenna branch. | 10-27-2011 |
20110267245 | MULTIPLE-INPUT MULTIPLE-OUTPUT ANTENNA SYSTEM - A Multiple-Input Multiple-Output (MIMO) antenna system with multiple antennas is provided. The MIMO antenna system includes a number of conductive elements, and a number of band stop devices. The conductive elements are spaced apart from each other and operate in corresponding resonant frequency bands respectively when they receive electric power. When the conductive elements are operated, the band stop devices block interference between the conductive elements in the resonant frequency bands, and isolate the conductive elements from each other. The band stop devices are located between adjacently separate conductive elements and connect the conductive elements to each other. The MIMO antenna system can stop interference between the conductive elements via the band stop devices, thereby increasing the operational efficiency of the conductive elements. | 11-03-2011 |
20110304516 | INFINITE WAVELENGTH ANTENNA DEVICE - The present invention relates to an infinite wavelength antenna device, which includes: a board body made of a dielectric and having a slab structure; a feed part arranged on one surface of the board body, and generating a magnetic field when power is applied; and an MNG resonance part arranged on the board body so that a preset distance is maintained from the feed part and at least a portion thereof is placed within the magnetic field, grounded through both ends thereof, resonating at a specific frequency band when the magnetic field is generated, and having a negative permeability. In the present invention, as the infinite wavelength antenna device operates according to the infinite wavelength property, the resonant frequency band may be determined independently of the size of the antenna device. Hence, miniaturization of the infinite wavelength antenna device can be realized. In addition, as power feeding is performed using magnetic coupling in the infinite wavelength antenna device, power can be easily fed to multiple resonance parts of the antenna device. Consequently, the infinite wavelength antenna device may resonate at multiple frequency bands or a wider frequency band. | 12-15-2011 |
20120007785 | ANTENNA APPARATUS FOR SIMULTANEOUSLY TRANSMITTING MULTIPLE RADIO SIGNALS WITH DIFFERENT RADIATION CHARACTERISTICS - An antenna element has a slit including a first portion and a second portion, the first portion extending in a first direction so as to separate first and second feed points from each other, and the second portion extending in a second direction different from the first direction. The slit is configured to resonate at an isolation frequency to produce isolation between the first and second feed points, and configured to form a current path around the slit. A current distribution along the current path generated by exciting through the first feed point is different from a current distribution along the current path generated by exciting through the second feed point, thus providing different radiation characteristics by the different current distributions. | 01-12-2012 |
20120188134 | ANTENNA DEVICE AND ELECTRONIC DEVICE INCLUDING ANTENNA DEVICE - According to one embodiment, an antenna device includes a first element, a stub, and an open end element. The first element has a folded monopole structure in which a conductor is folded at a folding portion to form a forward portion and a backward portion. A base end of the forward portion is connected to a feeding point, and a distal end of the backward portion is connected to a ground via a first lumped parameter. The stub is provided between the forward portion and the backward portion of the first element so as to shunt the forward portion and the backward portion. The open end element includes a conductor placed in parallel to the first lumped parameter. A base end of the conductor is connected between the stub of the backward portion of the first element and the ground, and the distal end of the conductor is open. | 07-26-2012 |
20120206307 | ANTENNA DEVICE AND COMMUNICATION DEVICE - An antenna device includes an antenna coil that receives a magnetic field transmitted from a reader/writer and a capacitor. The antenna device also includes a magnetic sheet formed at a face-to-face position with respect to the antenna coil and configured for changing the inductance of the antenna coil. The capacitor has a temperature characteristic in which the capacitance of the capacitor is changed with changes in temperature. The magnetic sheet is formed of a magnetic material having a temperature characteristic in which the inductance of the antenna coil is made to be changed with an opposite sign of change to that of the capacitance of the capacitor that is changed with changes in temperature in the working temperature range. In this manner, the resonance frequency of the antenna circuit in the working temperature range may be brought approximately into coincidence with the oscillation frequency of the reader/writer. | 08-16-2012 |
20120249384 | ANTENNA ARRANGEMENT AND A PORTABLE RADIO COMMUNICATION DEVICE COMPRISING SUCH AN ANTENNA ARRANGEMENT - An exemplary embodiment includes an antenna arrangement for a portable radio communication device comprising an NFC (near field communication) antenna, a BT (Bluetooth) antenna and an FM (frequency modulation) antenna. The NFC antenna, BT antenna and FM antenna are positioned in close proximity to each other and are operable simultaneously. The NFC antenna is fed through a first decoupling filter and is grounded through a second decoupling filter. | 10-04-2012 |
20130127677 | Radio-Frequency Device and Wireless Communication Device - The present invention discloses an RF device for a wireless communication device, including a grounding element, an antenna, including a radiating element, a feed-in element, a coupling element, a switch, coupled between the coupling element and the grounding element, for connecting or disconnecting the grounding element to the coupling element, such that the antenna respectively operates in a first frequency band and a second frequency band, and a grounding terminal, for coupling the grounding element, a capacitive sensing element, for sensing an environment capacitance within a specific range through the radiating element, at least one capacitor, for blocking a DC route from the grounding terminal to the grounding element. | 05-23-2013 |
20130187816 | BAND-NOTCHED ULTRA-WIDEBAND ANTENNA - A band-notched ultra-wideband antenna comprises a top layer non-uniform short-circuit metal patch, a middle layer metal radiation patch, and a bottom layer metal patch. The bottom layer metal patch includes a coupled open/short circuit stub which is set close to the middle layer metal radiation patch. The equivalent circuit of the top layer non-uniform short-circuit metal patch is a parallel LC resonator, and the equivalent circuit of the coupled open/short circuit stub is a series LC resonator. The resonant frequency of the top layer non-uniform short-circuit metal patch is equivalent to the resonant frequency of the coupled open/short circuit stub, so as to function as a second-order bandstop filter to yield high notch-band-edge selectivity without increasing total circuit area of the band-notched ultra-wideband antenna. | 07-25-2013 |
20130194142 | FILTER CIRCUIT - A filter circuit includes: a filter element having a first terminal connected to an antenna, a second terminal connected to a receiving circuit, and a third terminal connected to a transmission circuit; a first inductor, a second inductor, and a third inductor connected in series between the first terminal and the third terminal of the filter element; a fourth inductor that has one end connected to a connecting node connecting the first inductor and the second inductor and that has the other end grounded; and a fifth inductor that has one end connected to a connecting node connecting the second inductor and the third inductor and that has the other end grounded. | 08-01-2013 |
20130278472 | Antenna Arrangement - Apparatus, methods, computer software and computer program products are provided for tuning a user equipment antenna to simultaneously operate at more than one resonant frequency by combining a first electrical load and a first frequency selective component to tune the antenna to a first resonant frequency with respect to signals in a first frequency range, and combining a second electrical load and a second frequency selective component to tune the antenna to a second resonant frequency with respect to signals in a second frequency range. The first electrical load, the second electrical load, the first frequency selective component and the second frequency selective component act to tune the antenna to operate simultaneously at the first resonant frequency and the second resonant frequency. | 10-24-2013 |
20130285862 | Reconfigurable Multi-band Filter - Reconfigurable multi-band filter techniques are described. In one or more implementations a device includes a radiating structure and a filter connected to the radiating structure configured to filter wireless signals received by the radiating structure. The filter includes switchable resonators configured to tune to different frequency bands and tunable capacitors configured to tune to different frequencies within the different frequency bands. | 10-31-2013 |
20140292596 | ANTENNA STRUCTURE - An antenna structure includes a circuit board and an antenna formed on the circuit board. The antenna includes a ground portion and a feed portion extended from the ground portion and defining a cut with the ground portion, a connecting portion, a first resonation portion, and a second resonation portion. The first resonation portion defines a first gap with the connecting portion and the feed portion and obtains a first working frequency band by adjusting dimensions of the first resonation gap and the cut. The second resonation portion defines a second gap with the connecting portion and the ground portion, and obtains a second working frequency band by adjusting dimensions of the second resonation gap. | 10-02-2014 |
20140306854 | VIVALDI-MONOPOLE ANTENNA - A Vivaldi-Monopole antenna is a small form ultra-wideband antenna configured for low frequency operation in modern wireless devices. The Vivaldi-Monopole antenna comprises a tapered-slot element and a monopole element, wherein current modes of each element are combined to yield a functional and small form ultra-wideband antenna configured for low frequency resonances. | 10-16-2014 |
20140340268 | DIPLEX FILTER FOR TESTING BASE SYSTEM - An diplex filter for testing a base station is disclosed. The diplex filter for testing a base station in accordance with an embodiment of the present invention includes: a housing comprised with a first connector and a second connector which are connected to a base station, and a third connector connected with the antenna, wherein the first, the second and the third connectors bi-directionally transmit/receive signals; a band pass filter unit comprised in one inside in the housing, transmitting signals between the first and third connectors to pass predetermined frequency bands; a band reject filter unit comprised in the other inside in the housing, transmitting signals between the second and third connectors to reject predetermined frequency bands; and a coupling block disposed between the band pass filter unit and the band reject filter unit, and coupled the band pass filter unit and the band reject filter unit with the third connector, and to move the signal distortion phenomenon occurring due to unnecessary signals included in the signals to frequency bands other than predetermined frequency bands. | 11-20-2014 |
20140340269 | MULTIMODE ANTENNA STRUCTURE - A multimode antenna structure is provided for transmitting and receiving electromagnetic signals in a communication device. The communication device includes circuitry for processing signals communicated to and from the antenna structure. The antenna structure includes a plurality of antenna ports for coupling to the circuitry; a plurality of antenna elements, each operatively coupled to a different one of the antenna ports; and a plurality of connecting elements. The connecting elements each electrically connect neighboring antenna elements such that the antenna elements and the connecting elements are arranged about the periphery of the antenna structure and form a single radiating structure. Electrical currents on one antenna element flow to connected neighboring antenna elements and generally bypass the antenna ports coupled to the neighboring antenna elements such that an antenna mode excited by one antenna port is generally electrically isolated from a mode excited by another antenna port at a given desired signal frequency range, and the antenna structure generates diverse antenna patterns. | 11-20-2014 |
20140361941 | MULTI-TYPE ANTENNA - Exemplary embodiments are related to multi-type antennas. A device may include an antenna and a ground plane. The device may further include a low-pass filter for coupling the antenna to the ground plane in a first mode of operation and isolating the antenna from the ground plane in a second, different mode of operation. | 12-11-2014 |
20150061949 | BROADBAND ANTENNA WITH ADJUSTABLE RESONANT FREQUENCY BAND - A broadband antenna with adjustable resonant frequency band includes a grounding element, first and second radiating conductors, and a variable capacitor. The first radiating conductor includes a feed-in portion and a radiating portion. The feed-in portion includes a feed-in end spaced apart from and adjacent to the grounding element. The second radiating conductor includes a coupling portion, and a short-circuit portion connected electrically between the coupling portion and the grounding element. The coupling portion is parallel to and couples with the radiating portion. The variable capacitor is connected electrically between the radiating portion and the coupling portion. | 03-05-2015 |
20150070227 | ACOUSTIC WAVE ELEMENT, BRANCHING FILTER AND COMMUNICATION MODULE - SAW element has a substrate; an IDT having a first comb-shaped electrode and a second comb-shaped electrode located on an upper surface of the substrate; and a capacitance element located on the upper surface of the substrate. The capacitance element has a first counter electrode connected to the first comb-shaped electrode and a second counter electrode connected to the second comb-shaped electrode and facing the first counter electrode across a third gaps. The direction from the first counter electrode through the third gaps toward the second counter electrode is a reverse direction from the direction from the first comb-shaped electrode through the gaps toward the second comb-shaped electrode. If it is assumed that the gap and width of the gap are d | 03-12-2015 |
20150102968 | ANTENNA DEVICES HAVING FREQUENCY-DEPENDENT CONNECTION TO ELECTRICAL GROUND - Antenna devices and techniques that provide specific control of the spatial distributions of DC and RF signals at various positions in a wireless apparatus are disclosed. The wireless apparatus includes various device components each having specifications for achieving desired operations in antenna devices. | 04-16-2015 |
20150116167 | ANTENNA APPARATUS - An antenna apparatus may be provided that includes: a radiating metal; a ground which is connected to the radiating metal; a first impedance which forms a first path by being connected between the radiating metal and the ground, has an impedance value which is changed depending on a frequency, and opens the first path in response to a predetermined frequency, and a second impedance which forms a second path parallel with the first path by being connected between the radiating metal and the ground, has an impedance value which is changed depending on a frequency, and short-circuits the second path in response to the predetermined frequency. | 04-30-2015 |
20150116168 | ANTENNA DEVICE AND ELECTRONIC APPARATUS - A square bracket-shaped radiation element is in a non-ground region of a board. A first reactance element that equivalently enters a short-circuited state in a second frequency band is connected between a second end of the radiation element and a ground conductor. A second reactance element that equivalently enters a short-circuited state in a first frequency band s connected between a first end of the radiation element and the ground conductor. In the UHF band, the radiation element and the ground conductor function as an inverted F antenna that contributes to field emission. In the HF band, a loop including the radiation element and the ground conductor functions as a loop antenna that contributes to magnetic field emission. | 04-30-2015 |
20150145735 | Antenna - The present invention discloses an antenna and pertains to the field of communications technologies. The antenna includes: a printed circuit board, a first antenna feeding structure, a first antenna loading structure, and a first filter, where the first antenna feeding structure has a grounding pin and a feeding pin, the grounding pin and the feeding pin are separately connected to the printed circuit board, and the first antenna loading structure and a partial structure of the first antenna feeding structure form a coupling structure; and the first antenna loading structure is connected to the first filter, the first filter is connected to the printed circuit board, and the first filter is configured to cut off a low-frequency current. A low-frequency current is cut off by using a filter, so as to implement selective filtering for an antenna loading structure and extend operating bandwidth of the antenna. | 05-28-2015 |
20150311589 | MULTIBAND ANTENNA - Two high frequency antennas are provided in a multilayer substrate. Each high frequency antenna is configured of a radiation element, a high frequency power supply line, and a high frequency power supply unit. A low frequency antenna is configured of a series radiation element, a low frequency power supply line, and a lower frequency power supply unit. The series radiation element is formed of two radiation elements connected by a radiation element connection line. One end side of the series radiation element is connected to the low frequency power supply unit via the low frequency power supply line. Open stubs to block transmission of a high frequency signal (SH) are connected to the radiation element connection line and the low frequency power supply line. Short stubs to block transmission of a low frequency signal (SL) are connected to the high frequency power supply lines. | 10-29-2015 |