Abstract: According to one exemplary embodiment of the invention, a vehicle antenna apparatus is provided on a vehicle in such a way that this results in the antenna having a horizontal main beam direction. A first reflection apparatus above the conductive roof of the vehicle, with an exciter between these two elements, causes the reflections to be doubled, thus causing the main beam direction to be lowered from a vertical to a horizontal direction.

Abstract: A small-sized antenna apparatus capable of two-dimensionally controlling directivity, and a wireless communication apparatus mounted with the same. The antennal apparatus includes a substantially rectangular patch antenna, a plurality of parasitic devices disposed around each side of the patch antenna, and a converting unit configured to switch an electrical length of each of the plurality of parasitic devices. The converting unit controls the electric length to be switched so that the parasitic devices serve as reflectors.

Abstract: An antenna assembly and a method of mounting such an assembly are disclosed. A first and a second assembly portion are joined together, wherein the assembly portions each comprise a elongated reflector body serving as a reflector for electromagnetic power radiated by the antenna assembly portion, and a set of antenna element receiving means located in a linear row along a longitudinal direction of the reflector body for respectively receiving an antenna element, and side portions along the long sides of the said reflector body. The assembly method comprises the step of fastening the first and second assembly portions to each other along a respective side portion of the said assembly portions so as to form a dual array antenna assembly.

Abstract: The present invention relates to a reflector for an antenna comprising a first reflector assembly and at least one second reflector assembly, the first reflector assembly having a first reflector structure adapted for a first antenna frequency band f1 and at least one second antenna frequency band f2; the at least one second reflector assembly having a second reflector structure adapted for the first antenna frequency band f1 and at least one third antenna frequency band f3; and wherein the first reflector assembly and the at least one second reflector assembly are electrically coupled so that the first reflector assembly and the at least one second reflector assembly together form a common reflector structure adapted for the first f1, at least one second f2 and at least one third f3 antenna frequency bands. Furthermore, the invention also relates to a multi band antenna comprising at least one such reflector.

Abstract: A high frequency (HF) beam antenna includes a set of radiating vertical monopole elements and a set of horizontal dipole elements. The horizontal dipole elements are parasitically coupled to corresponding radiating vertical monopole elements and are configured to counterpoise radiation from the radiating vertical monopole elements and to effectively isolate the vertical monopole elements from the underlying ground. The HF beam antenna has a high performance gain and low angles of radiation when installed at a height of 0.1 to 0.2 wavelength above ground. The HF beam antenna eliminates the need for a tower in the HF service range.

Abstract: A deployable reflectarray antenna includes a plurality of reflectarray antenna panels each having one edge connected to be folded and unfolded. Each reflectarray antenna panel includes a membrane having reflecting elements and a support frame. The support frame includes outer frames surrounding edges of the membrane, and a plurality of reinforcing members disposed in a vertical direction between the outer frames in a length direction.

Abstract: A sensor element for opening of doors and gates, with the aim being to allow production of a detection field for identification of people and/or static objects by means of an antenna element, the antenna element is intended to have a flat antenna unit, with a pin-like antenna projecting at least approximately vertically from the flat antenna unit.

Abstract: A cellular phone includes upper casing 2 having a front surface with LCD panel 21 disposed thereon, lower casing 3 having a front surface with key pad 22 disposed thereon, and an antenna, upper and lower casings 2, 3 being openably and closably coupled to each other. First control plate 10 for reflecting electromagnetic waves is disposed in upper casing 2, and second control panel 11 for reflecting electromagnetic waves is disposed in lower casing 3. First control plate 10 and second control plate 11 comprise separate members which are independent of each other. When the cellular phone is in an unfolded state in which the angle formed between the front surface of upper casing 2 and the front surface of the lower casing 3 is maximum, first control plate 10 and second control plate 11 have a maximum projected area on the surfaces of upper and lower casings 2, 3.

Abstract: There is disclosed a reflect array including a dielectric substrate having a first surface and a second surface. The first surface may support an array of phase-shifting elements. The second surface may support a conductive layer. At least some of the phase-shifting elements may be dual resonance phase-shifting elements.

Abstract: Embodiments of millimeter-wave communication systems and methods for communicating using millimeter-waves are described. In some embodiments, a directional antenna (102) may direct millimeter-wave signals substantially in a horizontal plane (115), and one or more reflectors (104) may be positioned to reflect the millimeter-wave signals to user devices (108).

Abstract: A feed element is configured to include a first antenna element having a first width, a dual-band forming inductor, and a second antenna element having a second width wider than the first width, where the first antenna element, the dual-band forming inductor, and a second antenna element are connected in series. The inductor is formed in a meander shape which has a trapezoidal envelope external shape to have a width formed to widen from the first width of a portion connected to the first antenna element toward a portion connected to the second antenna element.

Abstract: Method for focusing an electromagnetic or acoustic wave on a point near which one or more diffusers are placed, comprising a learning step in which the pulsed responses hij(t) between the focus point and each antenna of the network are determined. Waves corresponding to signals Sji(t)=Si(t)hij(?t), where Si(t) is a function of time and hij(?t) is a temporal inversion of the pulsed response hij(t), can then be transmitted form said antennas of the network.

Abstract: The inventive device enables to ensure its compactness, that is, a minimum thickness at a high antenna efficiency of an antenna in the frequency range 10.7-12.75 GHz. This technical effect can be achieved because the antenna comprises a main reflector (1), at least two feeds (2) and at least two sub-reflectors (3). Each sub-reflector is provided with such a shape of its external surface that ensures reflection of the feed directional pattern central beam to the edge of the main reflector and reflection of a lateral beam to the central area of the main reflector, the sub-reflector adjoining surfaces being truncated.

Abstract: This invention is related to a high efficiency antenna having compact dimensions, particularly for installation on a vehicle, such as an aircraft or a high velocity train or a motor vehicle, comprising a main circular reflector, an illuminator or feed, centrally mounted with respect to said main reflector, and a sub-reflector, mounted on said illuminator by means of a positioning support member, said antenna being installed upon a positioning member adapted to carry out azimuth and elevation polarisation movements.

Abstract: A antenna for transmitting radio signals of a lower frequency and a higher frequency includes a driven element comprising two first radiating units for a lower frequency band and two radiating units for a higher frequency band, and a reflector element comprising a first reflecting unit for the lower frequency band and a second reflecting unit for the higher frequency band. The second radiating units are disposed at a side of the first radiating units and respectively coupled to a corresponding first radiating unit. The first reflecting unit is disposed at the other side of the first radiating units, and the second reflecting unit is disposed between the first radiating units and the first reflecting unit.

Abstract: A communication device includes a processing module, a transmitter section, a receiver section, a wireless communication structure, a projected artificial magnetic mirror (PAMM) array, and a metal backing. The transmitter section and the receiver section are on a first layer. The wireless communication structure is on a second layer, the PAMM array is on a third layer, and the metal backing is on a fourth layer. The PAMM array includes a non-conductive area to support coupling of the wireless communication structure to at least one of the transmitter section and the receiver section. In addition, the PAMM array provides electromagnetic shielding of the at least one of the transmitter section and the receiver section from the wireless communication structure.

Abstract: A planar bi-directional radiation antenna including a substrate, a first reflecting element, an antenna body, a second reflecting element and a third reflecting element is provided. The first reflecting element is concaved inwards to form a first notch in a first surface. The antenna body is located inside the first notch, and is symmetrical to a predetermined direction with the first reflecting element. The second reflecting element is concaved inwards to form a second notch in a second surface. The configuration of the first notch and the second notch is correspondingly disposed along a vertical projection plane with respect to the substrate. The third reflecting element is opposite to the antenna body along the predetermined direction, and covers an opening of the first notch, so that the antenna generates two beams, wherein the two beams have an angle relative to the substrate, so as to achieve a bi-directional radiation effect.

Abstract: An antenna includes at least one element whose physical shape is at least partially defined as a second or higher iteration deterministic fractal. The resultant fractal antenna does not rely upon an opening angle for performance, and may be fabricated as a dipole, a vertical, or a quad, among other configurations. The number of resonant frequencies for the fractal antenna increases with iteration number N and more such frequencies are present than in a prior art Euclidean antenna. Further, the resonant frequencies can include non-harmonically related frequencies. At the high frequencies associated with wireless and cellular telephone communications, a second or third iteration, preferably Minkowski fractal antenna is implemented on a printed circuit board that is small enough to fit within the telephone housing.

Abstract: 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.

Abstract: Systems and methods for a dual-band antenna and methods for manufacturing the same are described. One system and method includes a plurality of antenna elements. Groups of the antenna elements cooperate to form directional antennas at various frequencies. Using an active element, configurable at different frequencies and reflectors tuned to different frequencies, directed transmission or direction of positive gain for the antenna system is achieved. The system can be used for various wireless communication protocols and at various frequency ranges.

Abstract: Multiple out-of-plane planar reflectors can be used to build a receive/transmit high-gain directional antenna. The driver portion and the first reflector of the antenna are formed within a metal layer of a PWB. A plurality of sets of reflector plates can be placed on the PWB, on a non-conductive low-dielectric constant material coating both opposing planar surfaces of the PWB, or on the opposing sidewalls of the product housing unit. The metal layer in the PWB is placed between the reflector plates. The plates can have either a parallel or non-parallel orientation to each another. This greatly increase the received power and thus increases the operating range of a low-power UWB system, as well as significantly improves wireless data transmission throughput. This antenna is applicable for USB communications systems.

Abstract: There is disclosed a reflect array including a dielectric substrate having a first surface and a second surface. The first surface may support an array of phase-shifting elements. The second surface may support a conductive layer. At least some of the phase-shifting elements may be dual resonance phase-shifting elements.

Abstract: An antenna assembly and a method of mounting such an assembly are disclosed. A first and a second assembly portion are joined together, wherein the assembly portions each comprise a elongated reflector body serving as a reflector for electromagnetic power radiated by the antenna assembly portion, and a set of antenna element receiving means located in a linear row along a longitudinal direction of the reflector body for respectively receiving an antenna element, and side portions along the long sides of the said reflector body. The assembly method comprises the step of fastening the first and second assembly portions to each other along a respective side portion of the said assembly portions so as to form a dual array antenna assembly.

Abstract: An antenna apparatus is provided, which removes dead directions, and at the same time, has a suppression means for easily suppressing the change of an antenna directivity pattern caused by the effect of a feed line or a radome and an improvement means for simply improving the VSWR deterioration caused by the effect of a reflector or the radome. The antenna apparatus includes a sleeve antenna connected to a coaxial cable and a reflector in the shape of a cone, the sleeve antenna including a central conductor and a sleeve, in which the sleeve antenna is arranged in a concave portion of the cone so that the central conductor is aligned with a central axis of the cone, and a top end of the central conductor is separate from a vertex portion of the cone.

Abstract: A small antenna device having an increased gain is provided. The antenna device includes a multilayer dielectric substrate composed of a combination of a plurality of dielectric layers, wherein a feeding antenna is provided in a lower layer of the multilayer substrate, a reflective metal plate is provided above the feeding antenna, and circular or rectangular metal loops are arranged so as to be of increasing diameter from lower layers toward upper layers in the plurality of dielectric layers.

Abstract: The invention is a passive parabolic antenna system for use with conventional subscriber module radio antennas. The passive parabolic antenna system includes a microwave feed assembly that forms a resonant cavity coupling device for coupling to an internal patch antenna of a conventional subscriber module radio antenna. A method of boosting signal strength of a conventional subscriber module radio antenna and a wireless communication system are also disclosed.

Abstract: A wireless communication system includes: a main antenna for radiating an electromagnetic wave to wireless IC chips; a reflecting plate for reflecting the electromagnetic wave from the main antenna to the wireless IC chips; and a control unit which supports the wireless IC chips. The control unit causes a difference between the receiving electromagnetic wave levels of a direct wave from the main antenna and a reflected wave from the reflecting plate received by the antenna of the wireless IC chip.

Abstract: A satellite antenna for transmitting and receiving an electromagnetic signal has at least one parabolic reflector, a source arm, and a high-power amplifier, in which antenna the high-power amplifier includes a traveling wave tube on the source arm and a high-voltage power supply off the source arm and adapted to supply power to the tube. A satellite mobile telecommunications station includes such a satellite antenna and a storage structure into which the antenna is folded and in which the high-voltage power supply sits.

Abstract: An antenna module is provided. The antenna module includes an antenna and an EBG element. The EBG element includes an EBG ground layer, a plurality of reflective units and a plurality of connection posts. The reflective units are arranged in a matrix, a gap is formed between the nearby reflective units, and the reflective units are corresponding to the antenna. Each connection post connects the reflective unit to the EBG ground layer.

Abstract: An antenna apparatus includes: a ground plane; a plurality of conductive elements arranged substantially in parallel to a surface of the ground plane; a plurality of linear elements configured to connect the conductive elements to the ground plane; and an antenna configured to radiate a radio wave, wherein a plurality of openings to reflect the radio wave radiated from the antenna are formed in the ground plane under an arrangement region of the conductive elements.

Abstract: The present invention relates to photonic band gap antennas. This antenna comprises according to a plane of directions x, y, a radiating source and a photonic band gap structure constituted by parallel metal rods, the rods repeating themselves nx times in the direction x and ny times in the direction y. The height of the rods seen from the radiating source is increasing. The invention is able to control the radiation pattern of the antenna in the vertical plane.

Abstract: The invention relates to a reconfigurable reflecting array antenna comprising a subset of patterns capable of radiating signals emitted in a given direction and means of loading and placing said radiating arrays to place one of them in a chosen emitting position, characterized in that: the loading and placement means comprise a system for scrolling a first film (F1) comprising the subsets of radiating patterns used to selectively position a subset of radiating patterns in the emitting position. The antenna can be of the reflecting array antenna type or of the phased array antenna type.

Abstract: An apparatus for an antenna system comprising one or more blades for splitting the electromagnetic field received by an antenna into a plurality of sections corresponding to separate beams and redirecting said plurality of sections for detection by a plurality of detectors. The apparatus may comprise a plurality of blades for splitting the field into successively smaller and smaller portions. The plurality of detectors can be positioned outside the focal region of the antenna system. The apparatus may further comprise focusing means for focusing the sections of the field onto another blade or a detector. There is also provided an antenna system comprising a plurality of feed horns for producing a plurality of beams; and a plurality of elements for redirecting said beams towards a focal region of the antenna system so as to form a group of closely packed beams for transmission by the antenna system.

Abstract: Embodiments of millimeter-wave communication systems and methods for communicating using millimeter-waves are described. In some embodiments, a directional antenna (102) may direct millimeter-wave signals substantially in a horizontal plane (115), and one or more reflectors (104) may be positioned to reflect the millimeter-wave signals to user devices (108).

Abstract: An antenna comprising a network of arrayed radiating elements, a first reflective means comprising a flat central part upon which are disposed the radiating elements and longitudinally folded edges on either side of the array of elements, and at least one second reflective means which is a choke reflector disposed outside of the space separating the radiating elements of the reflector's folded edge.

Abstract: In one embodiment, a backfire antenna comprises a cup-shaped member defining an outer aperture and an interior cavity, a splash-plate disposed within a plane, and a dipole assembly comprising first and second arms. The first and second arms are both oriented non-parallel to the splash-plate towards the plane.

Abstract: An antenna device, includes a plurality of substrate type antennas arranged in a direction, each of the substrate type antennas includes a dielectric substrate, an electric supply line that includes a microstrip line and is formed on the dielectric substrate, and antenna elements each of which includes microstrip lines and formed on the dielectric substrate, and a reflector plate located along the direction that the substrate type antennas are arranged. The substrate type antennas each have different angles of inclination relative to the reflector plate.

Abstract: Dual reflector offset mechanical pointing low profile telecommunication antenna, to be used above all on vehicles, even high-speed ones. Its reduced physical dimensions facilitate its use, with respect to the known solutions, as it allows its connecting to the receiving system, such as a satellite, though installed on a train or on an aircraft. The invention lies within the technical field of telecommunications and the applicative field of stationary, movable antennas of reduced dimensions, and accordingly within that of telecommunications in general. The original dual reflector antenna is obtained from a second-order polynomial that configurates it in the Cartesian space XYZ.

Abstract: This invention is related to a high efficiency antenna (1) having compact dimensions, particularly for installation on a vehicle, such as an aircraft or a high velocity train or a motor vehicle, comprising a main circular reflector (5), an illuminator (2) or feed, centrally mounted with respect to said main reflector (5), and a sub-reflector (3), mounted on said illuminator (2) by means of a positioning support member (4), said antenna (1) being installed upon a positioning member adapted to carry out azimuth and elevation polarisation movements.

Abstract: A dual offset reflector system is disclosed. The system comprises a main reflector, a subreflector, a first gimbal mechanism for positioning of the subreflector. The system includes at least two feeds for receiving beams from the main reflector and the subreflector. One of the feds is at a focal point of the system and the other beam is displaced from the focal point. Accordingly, a simple solution to restore antenna gain reduction and avoid beam distortion due to the scan loss for a reflector system is provided that utilizes multiple feeds at different frequencies and polarizations. By placing the feeds at focal point trajectory of the subreflector whose positioning is controlled by a gimbal mechanism, a system is provided that minimizes distant and scan loss in a dual reflector system. The gimbal mechanism positions the subreflector so that a desired feed is in the focal point of the subreflector.

Abstract: A first set of screws secures a Cassegrain-configuration microwave antenna's primary reflector to its low-noise block down-converter without additionally securing that reflector or the low-noise block down-converter to the antenna's feed tube, which a second set of screws separately secures to the low-noise block down-converter.

Abstract: A method for making an antenna array includes forming a ground plane having spaced apart openings extending therethrough, and forming a first antenna board having a support section and spaced apart first legs extending outwardly from the support section. An antenna element is formed on each outwardly extending first leg. A second antenna board having a support section and at least one second leg extending outwardly from the support section is formed. An antenna element is formed on the at least one outwardly extending second leg. The outwardly extending first legs are inserted through a corresponding number of openings in the ground plane. Similarly, the at least one outwardly extending second leg is inserted through one of the openings in the ground plane. The first and second legs are inserted so that their respective support sections contact the ground plane.

Abstract: A first set of screws secures a Cassegrain-configuration microwave antenna's primary reflector to its low-noise block down-converter without additionally securing that reflector or the low-noise block down-converter to the antenna's feed tube, which a second set of screws separately secures to the low-noise block down-converter.

Abstract: The present invention discloses an antenna apparatus comprising a reflector including a V-like structure (from the cross-sectional view) with an angle. A radiation unit (antenna) is set within the V-like structure. The angle is about 120 degree. The V-like structure includes a fixing plate, a first side plate attached on a first edge of the fixing plate and a second side plate attached on a second edge of the fixing plate, thereby constructing the angle.

Abstract: An antenna apparatus, which can increase capacity in a cellular communication system or Wireless Local Area Network (WLAN), such as an 802.11 network, operates in conjunction with a mobile subscriber unit or client station. At least one antenna element is active and located within multiple passive antenna elements. The passive antenna elements are coupled to selectable impedance components for phase control of re-radiated RF signals. Various techniques for determining the phase of each antenna element are supported to enable the antenna apparatus to direct an antenna beam pattern toward a base station or access point with maximum gain, and, consequently, maximum signal-to-noise ratio. By directionally receiving and transmitting signals, multipath fading is greatly reduced as well as intercell interference.

Abstract: A method, an apparatus, and a computer program product for electromagnetically designing a shaped-reflector multibeam antenna (100) are disclosed. An initial configuration of the multibeam antenna (100) for given beam directions is provided of reflectors (110,120) shaped with an initial reflector shaping process (612) and feeds of an initial specification (614). The initial reflector shaping process (612) is an iterative optimization process for increasing the focusing of optical rays incident on the multibeam antenna from the given beam directions (100). A second iterative optimizing process consisting of optimizing (620) radiation patterns of feeds (140A-140D) and optimizing (622) surface shapes and sizes of reflectors (110,120) is used to reduce beam spillover, improve beam shapes and obtain beams with gain radiation patterns within required upper and lower bounds.

Abstract: A communication system including an antenna array with feed network coupled to communication electronics. In one example, a communication subsystem comprises a plurality of antennas each adapted to receive an information signal and a plurality of orthomode transducers coupled to corresponding ones of the plurality of antennas, each OMT is adapted to provide at a first component signal having a first polarization and a second component signal having a second polarization. The communication subsystem also comprises a feed network that receives the first component signal and the second component signal from each orthomode transducer and provides a first summed component signal at a first feed port and a second summed component signal at a second feed port, and a phase correction device coupled to the first and second feed ports and adapted to phase match the first summed component signal with the second summed component signal.

Abstract: The portable telephone includes an antenna and a metallic cabinet operating as main radiation sources of electromagnetic waves, a feeding point for supplying said antenna and said metallic cabinet with electric power, an outer packaging formed of such a material as plastics or resin, and a reflecting plate for reflecting the electromagnetic waves radiated from said radiation sources, the reflecting plate being provided for increasing the amount of the electromagnetic waves radiated into a free space when the portable telephone is in use, being selectively arranged at a position where an electric field component or a magnetic field component of the electromagnetic waves radiated from said radiation sources is dominant, and having an electric constant which enables effective reflection of said magnetic field component or said electric field component and causes little electric power absorption.

Abstract: A ring focus antenna and method of using same. The ring focus antenna can have a main reflector of revolution shaped as a non-regular paraboloid about a boresight axis of the antenna. A sub-reflector/feed pair is provided comprising a sub-reflector of revolution shaped as a non-regular ellipsoid having a ring-shaped focal point about the boresight axis. A feed element is installed at a feed element location separated spaced from a vertex of the sub-reflector on the boresight axis of the antenna. The main reflector is adapted for operation with multiple sub-reflector/feed pairs having a coupled configuration, and multiple sub-reflector/feed pairs having a decoupled configuration (i.e. classical optical dual reflector system). The main reflector is operable at a plurality of spectrally offset frequency bands. For example, the antenna can be designed for operation over C-band, X-band, Ku-band, and Ka-band.

Abstract: An antenna system consisting of parabolic rectangular reflectors disposed contiguously in a linear array. The use of parabolic rectangular reflectors permits the reflectors to form a larger common rectangular aperture without gaps in illumination. The contiguous array of parabolic rectangular reflectors permits a lower profile which is ideal for use on an aircraft. Each parabolic rectangular reflector has its own feed system and each of the feeds are excited in phase. The combined radiation patterns of the parabolic reflectors produces a beam with a narrow width. This narrow beamwidth permits the system to communicate with one source while filtering out signals coming from other sources. In one embodiment, the antenna system may be mechanically steered in order to communicate with a transmitter and/or receiver whose relative position is continuously varying with respect to the antenna system.