Abstract: An array antenna apparatus (100) includes a radiating element (A0) for receiving a transmitted radio signal, two parasitic elements (A1, A2), and two variable reactance elements (12-1, 12-2) connected to the respective parasitic elements (A1, A2), and a directivity characteristic of the array antenna apparatus is changed by changing reactances set to the variable reactance elements. An antenna controller (10) selects and sets one reactance to be set from those in a first case in which a first reactance set is set to the two variable reactance elements (12-1, 12-2) and a second case in which a second reactance set is set to the two variable reactance elements (12-1, 12-2) to be able to obtain a diversity gain equal to or larger than a predetermined value, based on a received radio signal, based on signal quality of the radio signal.

Abstract: A low-loss, high-efficiency, broadband antenna including both electric and magnetic dipole radiators is provided herein. The broadband antenna may be referred to as a “P×M antenna” and may generally include a ground plane; a magnetic radiator formed within the ground plane; a conductive feed arranged within a first plane, which is parallel to the ground plane; and an electric radiator arranged within a second plane, which is perpendicular to the ground plane and coupled at one end to the conductive feed. According to a particular aspect of the invention, the electric and magnetic radiators are substantially complementary to one another and are coupled for producing a P×M radiation pattern over a broad range of operating frequencies. One advantage of the P×M antenna described herein is that the complementary antenna elements are combined without the use of a lossy, resistive matching network, thereby increasing the efficiency with which the P×M radiation pattern is produced.

Abstract: A low-cost high performance ultra wideband antenna that combines a plurality of shielded cables with properly selected and carefully positioned load balancing components to form a novel closed loop dipole is disclosed. The apparatus includes a closed-loop broadband antenna circuit that may be comprised of single or multiple conductive radiating elements that are electrically connected to one another at the flare-end of each antenna leaf by at least one shielded conductor in one or more shielded cables of any type. The shielded cable portion of the closed loop circuit may be interrupted by load impedance tapered regions that are positioned in an area that does not interfere or interferes minimally with antenna performance. The closed-loop broadband antenna circuit and the feed-point connections may be grounded by a separate path within the device. The disclosed approach simultaneously mitigates known problems of parasitic side lobes, antenna ringing, and RF coupling that commonly plague prior art.

Abstract: A shielding device for preventing an antenna signal from interference is disclosed. The shielding device includes a grounding component and a shielding plate. The shielding plate is made of a conductive material. The shielding plate has a first portion and a second portion. The first portion is grounded through the grounding component. The second portion is placed between an antenna and a display controller, so that the shielding plate can prevent the antenna from being interfered by the frequency component of the display controller.

Abstract: An antenna includes a keypad assembly having a plurality of key buttons, a main antenna unit, and a second antenna unit where a predetermined pattern is formed. The second antenna unit is interposed between components of the keypad assembly. Accordingly, a separate installation space for the antenna radiator is not required in the main board, thus contributing to volume reduction of the terminal. Also, since an installation area corresponding to the total area of the keypad assembly is available, antennas for different bands may be installed.

Abstract: An antenna glazing for automobiles, including an electrically conducting cladding extending surface-wise over the surface of the glazing up to a zone of the free edge of the cladding, serving as an antenna element, and a coupling electrode furnished with external connections, coupled in the capacitive regime to the electrically conducting cladding with interposition of an insulating layer. The coupling electrode is composed at least of one thin wire, which starts from the zone at the edge of the glazing, is conducted over the surface covered by the cladding, and is returned to the zone of the edge with at least one fold, so that the two ends of the wire are situated in the zone of the edge of the glazing.

Abstract: In an antenna structure including a feeding radiation electrode and a non-feeding radiation electrode that are electromagnetically coupled to each other, due to formation of a main slit, the feeding radiation electrode includes a U-turn portion in the middle of a path circumventing the main slit from a feeding end to an open end. A sub-slit for forming an open stub that is connected to the U-turn portion and that provides the U-turn portion with electrostatic capacitance is formed in the feeding radiation electrode.

Abstract: A broadband antenna includes a radiation part (10) for radiating and receiving electromagnetic signals, a feed portion (30) for feeding the electromagnetic signals, and a pair of ground planes (40) respectively disposed on sides of the feed portion. The radiation part comprises an annular first radiation segment (12) and an annular second radiation segment (14) being inscribed within a space defined by the annular shape of the first radiation segment. The feed portion is electrically connected to the radiation part.

Abstract: A vibration isolation system for the antenna of a vehicle, such as a maritime vessel. The vibration isolation system has a staged construction that slidably attaches the maritime antenna to a maritime vessel along up to three independent axes of translation. This staged construction is adapted for independently decreasing movement of the antenna along the independent axes of translation. Accordingly, the staged construction prevents the antenna from rotating due to induced translational vibration and thus enhances the pointing performance for the antenna.

Abstract: An modular, inflatable, multifunction, multipurpose, parabolic reflector apparatus having a plurality of manufactured parabolic mirrors made from a pressure-deformable reflective covering of an inflatable ring for focusing electromagnetic energy from radio frequency radiation (RF) through the ultraviolet radiation (UV) and solar energy for (1) heating and cooking, for (2) electrical power generation, for (3) enhancing the transmission and reception of radio signals, for (4) enhancing vision in low-light environments, and for (5) projection of optical signals or images. The device also has non-electromagnetic uses, such as the collection of water. A first main embodiment utilizes two reflective membranes. A second main embodiment utilizes a reflective membrane and a transparent membrane. Portability is enhanced by complete collapsing of the inflatable device.

Abstract: An antenna device includes an antenna part and a dielectric formed on the antenna part. The dielectric is formed to be thicker in a direction of directivity that the antenna part is to be made to have, than in another direction.

Abstract: A wideband monopole antenna assembly includes a substrate having an antenna connector, a wideband monopole antenna positioned on the substrate, and a feeder unit positioned on the rear surface of the substrate for supporting the antenna with a part thereof bent at a predetermined angle. The wideband monopole antenna has a feeder portion shorter than conventional antennas for compactness of the antenna.

Abstract: A multi-band antenna (1) used in wireless communications includes a radiating portion (2), a grounding portion (4), and a connecting portion (3). The radiating portion (2) includes a first radiating element (21) operating at 900 MHz frequency band and a second radiating element (22) operating at 1800 MHz frequency band. The connecting portion (3) connects the radiating portion (2) and the grounding portion (4). The grounding portion (4), the radiating portion (2), and the connecting portion (3) locate in the same plane.

Abstract: An antenna for electromagnetic waves including a quantum interference filter, at least one low-temperature transistor and primary antenna structures, means for deriving an electromagnetic wave from the circuit, cooling elements and insulating means. The interference filter and the transistor act as active components, the primary antenna structure is connected up to at least one of the active components in such a way that upon incidence of an electromagnetic wave on the primary antenna structure there is present at the output of the at least one active component a conducted electromagnetic wave, and wherein at least one part of the circuit and at least one part of the primary antenna structure are thermally insulated, the thermal insulation is frequency transparent to electromagnetic waves, and the cooling elements are designed to cool down at least one part of the circuit below the transition temperature of at least one of the superconducting materials.

Abstract: A multiple-band antenna having a plurality of operating frequency bands is provided. The antenna includes a plurality of structures configured for operation in respective ones of the plurality of operating frequency bands, and a plurality of structures configured for operation in more than one of the plurality of operating frequency bands.

Abstract: A system and method for a wireless link to a remote receiver includes a communication device for generating RF and an antenna apparatus for transmitting the RF. The antenna apparatus comprises a plurality of substantially coplanar modified dipoles. Each modified dipole provides gain with respect to isotropic and a horizontally polarized directional radiation pattern. Further, each modified dipole has one or more loading structures configured to decrease the footprint (i.e., the physical dimension) of the modified dipole and minimize the size of the antenna apparatus. The modified dipoles may be electrically switched to result in various radiation patterns. With multiple of the plurality of modified dipoles active, the antenna apparatus may form an omnidirectional horizontally polarized radiation pattern. One or more directors may be included to concentrate the radiation pattern. The antenna apparatus may be conformally mounted to a housing containing the communication device and the antenna apparatus.

Abstract: A dual polarized variable beam tilt antenna having a superior Sector Power Ratio (SPR). The antenna may have slant 45 degree dipole radiating elements including directors, and may be disposed on a plurality of tilted element trays to orient an antenna boresight downtilt. The directors may be disposed above or about the respective dipole radiating elements. The antenna has a beam front-to-side ratio exceeding 20 dB, a horizontal beam front-to-back ratio exceeding 40 dB, a high-roll off, and is operable over an expanded frequency range.

Abstract: A phase shifter module (CD), dedicated to a reflectarray antenna, is defined by a characteristic resonant length and, in at least one chosen place, has an MEMS type device (DC, DC?) able to be placed in at least two different states respectively permitting and prohibiting the establishing of a short-circuit intended to vary said resonant length, in order to vary the phase shifting of a wave to be reflected presenting at least one linear polarization.

Abstract: An antenna apparatus including a dielectric substrate, a planar antenna element disposed on the substrate, and a waveguide for propagating electromagnetic waves to or from the planar antenna element. The waveguide includes at least a first conductor and a second conductor extending along each other. Near a connection portion formed between the first and second conductors and the planar antenna element, there is provided a taper region in which a distance between mutually-facing edge portions of the first conductor and the second conductor increases approximately monotonically toward the planar antenna element.

Abstract: A triple-band embedded antenna includes an antenna base and a metal connecting board. A left groove, a right groove and a square opening are formed in the antenna base. A left branch is separated from the antenna base by the left groove, the left branch arranged in the outside of the left groove, a signal feed point formed in the left branch. A right branch is separated from the antenna base by the right groove, the right branch arranged in the outside of the right groove, a ground point formed in the right branch. The antenna base is for receiving or radiating the low frequency band signal. The left groove is for receiving or radiating the high frequency band signal. While the right groove coupled with the left groove, the left groove can receive or radiate another high frequency band signal, which is the third frequency band signal.