Class / Patent application number | Description | Number of patent applications / Date published |
343792500 | Logarithmically periodic | 14 |
20080204343 | Broadband Multi-Dipole Antenna with Frequency-Independent Radiation Characteristics - The invention describes a broadband multi-dipole antenna that has low input reflection coefficient, low cross polarization, rotationally symmetric beam and constant beam width and phase centre location over several octaves bandwidth. The dipoles are fed from one or a few feed points, and they may with advantage have log-periodic dimensions. The antenna is more compact, has lighter weight and is cheaper to manufacture than other solutions. It is very well suited for feeding single, dual or multi-reflector antennas. | 08-28-2008 |
20090015500 | Antenna Device - An antenna device includes a power supply, a first antenna element, a second antenna element, and a film. The first antenna element includes a first feed line connected with the power supply, and first radiators connected with the first feed line and arranged along the drawing direction of the first feed line. The second antenna element includes a second feed line connected with the power supply, and second radiators connected with the second feed line and arranged along the drawing direction of the second feed line. The second antenna element is linearly symmetric with the first antenna element. The film holds at least the first and second antenna elements. | 01-15-2009 |
20090027291 | BROADBAND DIPOLE ANTENNA - A broadband dipole antenna includes a dielectric substrate, a first radiating portion, a second radiating portion, a substantially U-shaped or V-shaped feed gap, and two feed points. The feed gap is located in-between the first radiating portion and the second radiating portion. The two feed points are located in the first radiating portion and the second radiating portion, respectively, and separated by the feed gap. | 01-29-2009 |
20090027292 | Ultra-Wideband Log-Periodic Dipole Array with Linear Phase Characteristics - A log-periodic dipole array system employs a structure for the transmitter and the receiver designed in a way such that they compensate for the non-linear characteristics of each other to realize linear phase characteristics as a pair. Radiation elements on the receiver are positioned with respect to its corresponding transmission line in an order opposite to the positioning of the radiation elements on the transmitter. Although neither the transmitter dipole array nor the receiver dipole array itself has linear phase characteristics, the overall dipole array antenna system can realize linear phase characteristic. The log-periodic dipole array system has the advantages that linear phase characteristics can be obtained without sacrificing high radiation efficiency and gain. | 01-29-2009 |
20090096695 | Active Photonic Forbidden Band Antennae - The present invention relates to an active photonic band gap antenna. In this case, the photonic band gap structure is constituted by metal rods, some of which are discontinuous, namely composed of sections of rods connected by a switching element such as a PIN diode. According to the invention, only one rod in a row of rods seen from the radiating source is discontinuous. The antenna pattern can be controlled at a low cost. | 04-16-2009 |
20100033392 | TAPERED MEANDER LINE ANTENNA - A tapered meander line antenna is formed by having a conductive material disposed on or in a non-conductive material, in which a length of the conductive material traversing from a proximal end to a distal end meanders in an approximately perpendicular direction from an axis of traversal from the proximal end to the distal end. The spacing between conductive lines that meander are made non-uniform and tapered to have less spacing between the conductors toward the distal end. In one instance the spacing is tapered to have a logarithmic pattern. | 02-11-2010 |
20100134371 | INCREASED BANDWIDTH PLANAR ANTENNAS - A broadband antenna may include a conductive antenna surface for radiating signals, a conductive backplane for reflecting signals radiated by the conductive antenna surface, and a dielectric layer disposed between the conductive antenna surface and the conductive backplane. The dielectric layer may include a plurality of dielectric substrates having differing dielectric constants. | 06-03-2010 |
20100182212 | COPLANAR WAVEGUIDE FED PLANAR LOG-PERIODIC ANTENNA - A CPW fed planar log-periodic antenna is provided. The antenna includes: an upper substrate; a planar log-periodic antenna structure formed beneath the upper substrate; a CPW-fed structure formed on the upper substrate for feeding energy into the planar log-periodic antenna structure; a lower substrate disposed beneath the upper substrate; and a wire structure formed beneath the lower substrate. The antenna of the present invention features efficient reduction of cross polarized radiation and thereby enhancing the performance. | 07-22-2010 |
20100207836 | Non-Planar Ultra-Wide Band Quasi Self-Complementary Feed Antenna - A non-planar, ultra-wide hand, quasi-self-complementary feed antenna is disclosed. The antenna provides an invariant phase center location over its entire frequency band, is compact and includes a low profile, and includes input matching better than is currently available over a decade of frequency bandwidth. The very compact feed couples dual polarization electromagnetic energy to a transmitter from free space or air with minimum losses and mismatches over a very wide frequency band. | 08-19-2010 |
20110148729 | LOG PERIODIC ANTENNA - A log periodic antenna includes first and second transmission lines parallel with each other; and a plurality of broadband radiation elements having first sides electrically connected to the first and second transmission lines, a predetermined angle being defined between the first sides of the broadband radiation elements and the first and second transmission lines, and second sides not electrically connected with the first and second transmission lines, the second sides having radiation surfaces larger than radiation surfaces of the first sides. A plurality of broadband radiation elements electrically connected with the first transmission line and a plurality of broadband radiation elements electrically connected with the second transmission line are positioned to face each other with reference to the first and second transmission lines. | 06-23-2011 |
20110221646 | COLLAPSIBLE ANTENNA - A collapsible antenna ( | 09-15-2011 |
20110227802 | LOG PERIODIC ANTENNA AND MANUFACTURING METHOD THEREOF - Disclosed is a log periodic antenna and a manufacturing method thereof. In the log periodic antenna, antenna elements are attached to an antenna body to thereby simplify a structure of the antenna, the antenna can be manufactured in various designs without restriction to the configuration of the antenna, and the number of contacting points between the antenna element and a feeder is minimized to thereby simplify the manufacturing process. By the antenna, it is possible to produce the log periodic antenna of the simple structure and of various designs without the restriction to the antenna configuration by attaching the signal pattern and ground pattern to the pattern receiving surface. | 09-22-2011 |
20120133566 | Foldable Log-Periodic Antenna - A foldable log-periodic antenna includes a feed line, one or more transmitting elements for transmitting and/or receiving electromagnetic signals, one or more supporting elements for holding the transmitting elements, and one or more elements for producing a tensile stress on the transmitting elements. One of the a transmitting elements is connected to one of the supporting elements and to the feed line, and with one supporting element is connected to the feed line via an articulated joint apparatus, such that the antenna can be moved from a transport position to an operating position and vice versa. The one or more elements for producing a tensile stress on the transmitting elements is a flexible tube, and can have an internal pressure applied to them and are connected to the supporting elements for holding the transmitting elements. | 05-31-2012 |
20130207864 | Wideband, Directional, Linearly Polarized Antenna Having High Polarization Purity - In the field of wideband directional antennas employing linear polarization, and in particular in the context of amplitude goniometry systems, polarization purity defects lead to deformation of the radiation diagrams that increases with the elevation, inducing degraded detection system location performance. An antenna is provided operating with linear polarization and having radiating elements of “sinuous” shape inscribed within a circle, and includes radiating elements printed on the two faces of a support, the elements of the first face being deduced from those of the other face by a rotation. | 08-15-2013 |