Abstract: A front end circuit for coupling a plurality of antennas to a multi-channel time domain duplex RF transceiver is disclosed. The front end circuit has a first transmit port, a first receive chain primary port, a first receive chain secondary ports, and a first antenna port connectible to a first one of the plurality of antennas. The front end circuit also has a second transmit port, a second receive chain primary port, and a second receive chain secondary port connectible to a second one of the plurality of antennas. A first switch has terminals connected to the first transmit port, the first receive chain primary port, and the second receive chain secondary port, as well as a common terminal that is connected to the first antenna port. Additionally, the front end circuit has a second switch that has terminals connected to the second transmit port, the second receive chain primary port and the first receive chain secondary port, and a common terminal connected to the second antenna port.

Abstract: The present disclosure discloses an antenna device, which comprises an array antenna and a power divider. The array antenna comprises a plurality of antenna units, and each of the antenna units comprises a conductive sheet engraved with a groove topology pattern, conductive feeding points and a feeder line. The power divider is adapted to divide a baseband signal into a plurality of weighted signals and then transmit the weighted signals to the antenna units arranged in an array via the conductive feeding points respectively. By arraying the antenna units and using the beam forming method, the directionality of the antenna can be designed as needed through phase superposition between the antenna units; and then, a reflective metal plate is provided on the back side of the antenna so that a back lobe of the antenna is compressed. In this way, the miniaturized antenna array can obtain a high directionality.

Abstract: A individually formed radiating unit, an antenna array, and an antenna assembly are provided. The individually formed radiating unit includes a reflector, at least one radiating element integrated into a first side of the reflector, and a housing disposed on a second side of the reflector. The housing forms a chamber for housing a feed network.

Abstract: A technique to extend antenna coverage pattern of a planar antenna array. In one instance a reflector is disposed above the planar antenna array and in another instance a lens element is disposed above the planar antenna array. The reflection or refraction of RF signals allows antenna coverage pattern to be extended in a horizontal direction parallel to the planar surface of the antenna array and beyond a coverage pattern that is typically not available, without such reflection or refraction of the RF signal.

Abstract: The multifrequency antenna comprises a substrate, antenna elements, shunt inductor conductors, series capacitor conductors, series inductor conductors, a connection point, and input/output terminals. The antenna elements are provided on the substrate and electrically connected to the connection point via the shunt inductor conductors. The antenna elements form capacitors together with the parts facing the series capacitor conductors and are electrically connected to the input/output terminals via these capacitors and series inductor conductors.

Abstract: Various antenna assemblies are disclosed. In one example, an antenna assembly includes a reflector including a first ground plane, a second ground plane below and spaced apart from the reflector, an antenna adjacent a surface of the reflector opposite the second ground plane, and a grounding post galvanically connecting the first ground plane and the second ground plane.

Abstract: A multi-loop antenna system includes: a plurality of loop antennas disposed on a substrate and arranged such that each of extending lines extending respectively from geometric centers of the loop antennas to a center point that is bounded by the loop antennas has a predetermined length, and that each of the loop antennas is spaced apart from an adjacent one of the same by a predetermined distance; and a system module facing toward and being spaced apart from and parallel to the substrate such that the grounding plane is able to reflect radiation from the loop antennas. Each of the loop antennas includes first and second radiator portions operable in respective frequency bands; the former having opposite ends that respectively serve as signal-feed and grounding sections; the latter having opposite ends that are connected respectively to the signal-feed and grounding sections.

Abstract: An antenna device includes: a substrate; micro-strip and grounding portions that are respectively disposed on opposite first and second surfaces of the substrate, the former including a signal-feed section for feeding of signals and a plurality of first connecting sections electrically connected to the signal-feed section; and a plurality of first loop antennas arranged along a peripheral edge of the grounding portion, each including a first radiator portion disposed on the first surface and electrically connected to a respective one of the first connecting sections, and a second radiator portion disposed on the second surface, electrically interconnecting the first radiator portion and the grounding portion, and cooperating with the first radiator portion to form a loop.

Abstract: An active antenna with an IP address including a first set of modules (Mi) and a second set of modules (M?j), both sets using a same hardware platform and each set integrating radiofrequency sub-modules. Further including at least an Ethernet connection to the core network for providing the active antenna with capability of operation from an anchor site, and a digital platform integrating a set of modules for base-band processing, operating in one or more of 2G, 3G and LTE technologies. The active antenna includes processing apparatus for control plane of 2G and 3G radio access networks, routing apparatus for lu, Gb or S1 data relay from/to the core network to provide the active antenna with capability of operation from a relay site. Further included is at least two optical ports for connection in chain with a pair of active antennas in the same relay site and a power supply connection.

Abstract: A structural body of the invention includes a first conductor plane (1), a plurality of second conductor planes (4) of which at least a portion is provided facing the first conductor plane (1), and a transmission line (6), having an open end, which is disposed between the first conductor plane (1) and the second conductor plane (4), electrically connected to any one conductor plane of the first conductor plane (1) or the second conductor plane (4) through a conductor connection portion (5) and provided facing the other conductor plane. A unit structure including at least the second conductor plane (4), the transmission line (6), and the conductor connection portion (5) is repeatedly disposed.

Abstract: A MIMO antenna includes first and second radiating elements, a conductive neutralization line, and first and second parasitic radiating elements. Each of the first and second radiating elements includes a straight portion connected to a serpentine portion. The straight and serpentine portions are configured to resonate in at least two spaced apart RF frequency ranges in response to the straight portion being electrically excited through a RF feed. The conductive neutralization line conducts resonant currents between the first and second radiating elements and has a conductive length that is configured to phase shift the conducted resonant currents to cause at least partial cancellation of currents in the first and second radiating elements which are generated by wireless RF signals received by the first and second radiating element from each other.

Abstract: A method and system are disclosed for wide angle multibeam antennas. The method and system involve a multibeam antenna system for generating high performance multiple spot beams. In one or more embodiments, the multibeam antenna system includes an oversized antenna reflector and a plurality of antenna feeds. The oversized antenna reflector has its surface shape optimized from a normal parabolic shape in order to broaden and shape the reflected spot beams to improve antenna performance. In addition, the diameter of the oversized antenna reflector is greater than ((100*?)/?), where ? is the wavelength in inches and ? is the beam to beam spacing in degrees. In some embodiments, the ratio of the focal length of the oversized antenna reflector to the diameter of the oversized antenna reflector (F/D) is greater than 0.7. In at least one embodiment, the system further includes an antenna sub-reflector.

Abstract: A multiple frequency projected artificial magnetic mirror (PAMM) includes a plurality of metal traces, a metal backing, and a dielectric material. The plurality of metal traces is on one or more layers of a substrate and the metal backing is on another layer of the substrate. The dielectric material is between the metal backing and the plurality of metal traces, which is electrically coupled to the metal backing. At least some of the plurality of metal traces is of various sizes and of various positioning and spacing to create a distributed inductor-capacitor network having a first frequency band of operation and a second frequency band of operation.

Abstract: A flat dish antenna includes a plurality of concentric coils, a plurality of eccentric coils, a metal backing, a dielectric material, and an antenna structure. The pluralities of concentric coils and eccentric coils are on a layer of a substrate. A concentric coil has a radiation pattern that is substantially normal to a plane of the concentric coil and an eccentric coil has a radiation pattern that's is offset from normal to a plane of the eccentric coil. The metal backing is on another layer of the substrate and the dielectric material is between the layer and the other layer of the substrate. The concentric coils and the eccentric coils are electrically coupled to the metal backing to produce a distributed inductor-capacitor networking that provides a focal point based on a combination of their radiation patterns. The antenna structure is located proximal to the focal point.

Abstract: A horizontally polarized antenna array allows for the efficient distribution of RF energy into a communications environment through selectable antenna elements and redirectors that create a particular radiation pattern such as a substantially omnidirectional radiation pattern. In conjunction with a vertically polarized array, a particular high-gain wireless environment may be created such that one environment does not interfere with other nearby wireless environments and avoids interference created by those other environments. Lower gain patterns may also be created by using particular configurations of a horizontal and/or vertical antenna array. In a preferred embodiment, the antenna systems disclosed herein are utilized in a multiple-input, multiple-output (MIMO) wireless environment.

Abstract: An antenna system for wireless networks having a dual stagger antenna array architecture is disclosed. The antenna array contains a number of driven radiator elements that are spatially arranged in two vertically aligned groups each having pivoting actuators so as to provide a controlled variation of the antenna array's azimuth radiation pattern.

Abstract: This invention is directed toward a data signal receiving means including an antenna and a plurality of Low Noise Blocks (LNB's). A reflective filtering means is provided and located with respect to the LNBs and antenna such that data signals received at a first frequency or frequency range pass through the reflective filter means to a first LNB and data signals at second frequency or frequency range are deflected by the reflective filtering means and do not pass therethrough and pass to the second LNB. In this way a single antenna can be used to receive and process multiple data signals received at different frequencies or frequency ranges.

Abstract: A multipath enhancer is disclosed ias including more than one antenna. At least one of a receiver and a transmitter is coupled to the more than one antenna. A selectively reflective surface is adjacent the more than one antenna. A controller is configured to alter the reflectivity of the selectively reflective surface.

Abstract: An object of the present invention is to provide a radio-on-fiber unit and a radio-on-fiber system which can transmit/receive signals at adequate rates especially, to/from a mobile device. A first aspect of the present invention relates to a radio-on-fiber unit (3) which includes an antenna array (1) and a light modulator array (2). The light modulator array (2) comprises antenna elements (5) and light modulators (7) that are connected with the respective antenna elements via electric circuits. The optical waveguide (13) is composed of linear optical waveguides (13) that are arranged along the light modulators (7) included in certain lines among the light modulators (7). The light modulator array (2) comprises reflection units (17) for connecting two adjacent linear optical waveguides with each other. Consequently, a signal light inputted to a light input unit (11) is outputted from a light output unit (15) via each linear optical waveguide (13).

Abstract: An antenna system comprising a first antenna element, a second antenna element, and a parasitic element, wherein the parasitic element is arranged with regard to the first antenna element and the second antenna element such that a greatest difference in gain between respective antenna patterns of the first and second antenna elements occurs at a null of the pattern of the first antenna element.

Abstract: Embodiments disclosed herein relate to diversity receive systems and methods. An antenna system may comprise a reflector and a plurality of feed antennas configured to receive a wireless signal from a common source with directional diversity. A receive system may comprise such antenna system in combination with a plurality of receivers and/or demodulators, and in combination with a combiner and/or controller.

Abstract: Some embodiments provide a relatively small antenna apparatus that acts as a passive repeater. The antenna apparatus can be designed to facilitate radio frequency (RF) signal gain for a collection or range of frequencies. In some embodiments, the antenna apparatus is placed near a device with a wireless receiver and/or transmitter, where the antenna apparatus causes increased RF signal intensity at the device by coupling RF signals from a proximate area of higher RF signal intensity into the area around the device. Accordingly, in some instances, an embodiment of the antenna apparatus can be used to increase the RF signal intensity in a null spot or dead spot by coupling RF signal energy from an area proximate to the null spot that has higher RF signal intensity.

Abstract: A mission-flexibility antenna includes a reflector and at least a first source and a second source of radiofrequency signals, which sources are arranged in front of the reflector, the reflector having a focal point and each source having a phase centre, and wherein the sources are independent, fixed and connected to separate radiofrequency feed systems defining different and predefined polarization and/or operating frequency characteristics, and in that it additionally includes means of displacement and orientation of the reflector from a first position in which the focal point of the reflector is placed at the phase centre of the first source to a second position in which the focal point of the reflector is placed at the phase centre of the second source.

Abstract: A single pole antenna array architecture provides an azimuth variable beamwidth. The array includes a number of driven radiating elements that are spatially arranged having a pivoting actuator so as to provide a controlled variation of the antenna array's radiation pattern.

Abstract: An antenna device includes a dielectric substrate, an electric supply line that includes a microstrip line and is formed on the dielectric substrate, an antenna element that includes a microstrip line and is formed on the dielectric substrate, and a reflector plate disposed on the dielectric substrate at a predetermined angle of inclination. The reflector plate is allowed to move relative to the dielectric substrate while keeping the predetermined angle of inclination.

Abstract: An antenna system comprising a first antenna element, a second antenna element, and a parasitic element, wherein the parasitic element is arranged with regard to the first antenna element and the second antenna element such that a greatest difference in gain between respective antenna patterns of the first and second antenna elements occurs at a null of the pattern of the first antenna element.

Abstract: An array antenna and an electronic apparatus using the array antenna are provided. The array antenna includes a plurality of antenna units, a first connection line, and a second connection line. Each of the antenna units includes a rectangular radiation region, a first feeding line and a second feeding line. The first and second feeding lines are connected to two adjacent feeding corners of the rectangular radiation region. The first connection line and the second connection line are disposed at two sides of the antenna unit for connection with the other ends of the first feeding line and the second feeding line, respectively.

Abstract: A partially reflect surface antenna includes a substrate, a reflective sheet and a plurality of supporting units. The substrate has an upper surface formed thereon a signal I/O for receiving and outputting high frequency signal. The reflective sheet partially reflects the high frequency signal and includes an array antenna block located at the surface of the reflective sheet. The plurality of supporting units support the reflective sheet to locate at the upper surface of the substrate and to maintain a predetermined distance between the reflective sheet and the substrate. The area of the array antenna block ranges from 0.31 to 0.8 times of the surface area of the reflective sheet.

Abstract: This invention describes a method for improving isolation between the main antenna (e.g., a GSM antenna) and at least one further antenna (e.g., a BLUETOOTH/WLAN antenna, a diversity antenna, etc.) in an electronic communication device by a floating parasitic element placed between these two antennas for providing an isolation from electro-magnetically coupled currents between these two antennas in a ground plane, wherein the antennas are connected to the ground plane and the parasitic element is floating and electrically isolated from the ground plane. The advantages of the present invention include but are not limited to a more compact placement of antennas and a reduced cost and better reliability compared to an approach involving grounded parasitic elements.

Abstract: A receiver includes an array antenna, terminals, switches, a receiving circuit, a switch control unit and a reactance setting unit. Receiving circuit determines a received frequency and a received signal quality of a received signal by demodulating the received signal provided from the array antenna. The receiving circuit provides the received frequency to the reactance setting unit as a frequency setting signal, and provide the received signal quality to the switch control unit and the reactance setting unit. The reactance setting unit sets a set of the reactances corresponding to the received frequency in the terminals for each frequency, and the switch control unit switches connections in the switches to provide the received signal quality equal to or greater than the threshold.

Abstract: An antenna system for wireless networks having a dual stagger antenna array architecture is disclosed. The antenna array contains a number of driven radiator elements that are spatially arranged in two vertically aligned groups each having pivoting actuators so as to provide a controlled variation of the antenna array's azimuth radiation pattern.

Abstract: A variably controlled stagger antenna array architecture is disclosed. The array employs a plurality of driven radiating elements that are spatially arranged having each radiating element or element groups orthogonally movable relative to a main vertical axis. This provides a controlled variation of the antenna array's azimuth radiation pattern without excessive side lobe radiation over full range of settings.

Abstract: An antenna system comprises a parasitic element, which is an electrically tuned structural element, installed between antennas to reduce or eliminate antenna-to-antenna coupled electromagnetic interference by emitting destructive interference in the direction from one antenna to another antenna. The antenna system comprises a first antenna operating at a first wavelength, a second antenna operating at a second wavelength, and a parasitic element located between the first antenna and the second antenna for reducing the amplitude of signals from the first antenna that would otherwise create electromagnetic interference in a receiver connected to the second antenna. The parasitic element is typically spaced from the first antenna by a distance substantially equal to one quarter of the first wavelength. The parasitic element generally has a height that is greater than the height of the first antenna.

Abstract: Antenna systems and methods are disclosed having parasitically-coupled surface-attachable antenna systems that provide significant advantages for portable information handling systems. A secondary antenna is coupled within a chassis for an information handling system, and a primary antenna is attached to an external surface of the chassis for the portable information handling system. The primary antenna element is configured to be parasitically coupled to the secondary antenna. For receive operations, radio frequency (RF) signals are received by the primary antenna element, and signals are parasitically induced on the secondary antenna. For transmit operations, RF signals are transmitted to the secondary antenna element, and signals are parasitically induced on the primary antenna.

Abstract: An antenna module and a signal-processing module using the antenna module to process a plurality of wireless signals are proposed. The signal-processing module includes the antenna module, a first processing circuit and a second processing circuit. The antenna module includes at least a first antenna, at least a second antenna and a shielding portion. The first antenna is utilized to transmit or receive signals corresponding to a first wireless communication standard, the second antenna is utilized to transmit or receive signals corresponding to a second wireless communication standard, and the shielding portion is disposed between the first antenna and the second antenna. The first processing circuit is coupled to the first antenna for processing signals of the first antenna, and the second processing circuit is coupled to the second antenna for processing signals of the second antenna.

Abstract: An antenna adapted for wireless networks and having a variably controlled stagger antenna array architecture is disclosed. The antenna array contains a plurality of driven radiating elements that are spatially arranged having each radiating element or element groups orthogonally movable relative to a main vertical axis so as to provide a controlled variation of the antenna array's azimuth radiation pattern.

Abstract: A wireless communication device includes a housing, and a wireless communication module installed inside the housing. The wireless communication module includes a plurality of WLAN units, and each WLAN unit includes at least one antenna for receiving and emitting radio signals. The wireless communication module further includes an antenna control unit connected to the plurality of WLAN units for switching the antennas of the plurality of WLAN units, and a processing module installed inside the housing including a computation unit for computing the data transmission information of the plurality of WLAN units and a control unit for controlling the antenna control unit according to the data transmission information computed by the computation unit.

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: 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 high-isolation multiple in, multiple out (MIMO) antenna array includes, in one configuration, a ground plane, and a plurality of antenna transmitting/receiving elements arranged near the periphery of the ground plane, wherein each of the antenna transmitting/receiving elements is resonant at a frequency f. Also, the array includes an isolation antenna element located on the ground plane, between the plurality of antenna transmitting/receiving elements. The isolation antenna element is also resonant at the same frequency f. The plurality of antenna transmitting/receiving elements and the resonant isolation antenna element are arranged on the ground plane arranged so as to achieve substantially greater than 15 dB isolation of the antenna transmitting/receiving elements. In some configurations, at least about 30 dB of isolation of the antenna transmitting/receiving elements can be achieved.

Abstract: An antenna system comprises a parasitic element, which is an electrically tuned structural element, installed between antennas to reduce or eliminate antenna-to-antenna coupled electromagnetic interference by emitting destructive interference in the direction from one antenna to another antenna. The antenna system comprises a first antenna operating at a first wavelength, a second antenna operating at a second wavelength, and a parasitic element located between the first antenna and the second antenna for reducing the amplitude of signals from the first antenna that would otherwise create electromagnetic interference in a receiver connected to the second antenna. The parasitic element is typically spaced from the first antenna by a distance substantially equal to one quarter of the first wavelength. The parasitic element generally has a height that is greater than the height of the first antenna.

Abstract: An antenna device includes a first elliptic reflective surface, a first antenna and a second antenna. The first elliptic reflective surface has a first focus and a second focus. The first antenna is disposed on the first focus, and the second antenna is disposed on the second focus. The first antenna transmits a first signal and a second signal, and the second antenna receives the first signal and the second signal. The first signal is transmitted directly to the second antenna from the first antenna. The second signal is reflected by the first elliptic reflective surface and transmitted to the second antenna.

Abstract: A high-isolation multiple in, multiple out (MIMO) antenna array includes, in one configuration, a ground plane, and a plurality of antenna transmitting/receiving elements arranged near the periphery of the ground plane, wherein each of the antenna transmitting/receiving elements is resonant at a frequency f. Also, the array includes an isolation antenna element located on the ground plane, between the plurality of antenna transmitting/receiving elements. The isolation antenna element is also resonant at the same frequency f. The plurality of antenna transmitting/receiving elements and the resonant isolation antenna element are arranged on the ground plane arranged so as to achieve substantially greater than 15 dB isolation of the antenna transmitting/receiving elements. In some configurations, at least about 30 dB of isolation of the antenna transmitting/receiving elements can be achieved.

Abstract: Systems and methods for providing network access to mobile devices that travel with a vehicle, such as a train, a bus, a boat, etc. along or adjacent to a relatively fixed path that may extend over a large geographic area. Mobile devices access the network through stationary access points arranged along or adjacent to the path and communicate with a communication network. The communication network may be arranged as an asynchronous transfer mode (ATM) local area network emulation (LANE) network. One of the mobile devices may be a mobile access point which can couple other mobile devices to the network and record authentication information of other mobile devices so that fast transitions can be made from one stationary access point to another as the vehicle moves along the path.

Abstract: A triple-band offset hybrid antenna having a shaped reflector is disclosed. The triple-band offset hybrid antenna includes: a shaped reflector reflecting a K/Ku bands RF signals received from a satellite to focus an energy of the K/Ku band RF signals on a focal line and reflecting a Ka band RF transmitting signal; and a triple-band active phased feed array receiving the reflected K/Ku bands RF signals from the shaped reflector and radiating the Ka band RF transmitting signal to the shaped reflector, wherein the triple-active feed array including Ka/K bands feed array for transceiving Ka/K bands RF signal and a Ku band feed array for receiving a Ku band RF signal.

Abstract: An antenna apparatus comprising bent dipoles and fed by a quarter-wave balun transformer with a single coaxial cable feed is disclosed. In this embodiment, the antenna elements are patterned onto a dielectric circuit board which is then mounted horizontally into a molded shell. The antenna is tuned by trimming the bent dipoles patterned on the circuit board.

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: An electronic scanning radio direction finding system for accurate direction finding of radio frequency signals using singly or doubly flared cylindrical reflectors surrounded by a circular array of inwardly facing feed horns. The array is operated as a phased array to determine the direction of origin of received signals. The feed horns can also be used to transmit RF signals on very narrowly controlled beams with minimal side lobes. The flared cylindrical reflector and its circular feed horn array may be paired with circular log periodic arrays operable at similar frequency ranges or different frequency ranges to provide more precise direction finding and direction finding of signals at frequencies beyond the range of the flared cylindrical reflector and its circular feed horn array.

Abstract: An antenna includes a reflector panel having an inner concave surface and an outer convex surface, a circuit board having two antenna members directed toward different directions and having a terminal coupled to a cable device. The circuit board is received in the concave surface of the reflector panel, and the concave surface of the reflector panel may be used to reflect or to concentrate signals to and from the circuit board. It is preferable that the antenna members are disposed on two opposite surfaces of the circuit board, and directed toward opposite directions. A casing may support the circuit board, and has a channel to receive the circuit board.

Abstract: A physically small antenna having a wide bandwidth that facilitates the inspection of the attachment to the printed circuit board. The antenna is provided with a dielectric plate having a rear surface, a conductive plate disposed on the rear surface, a vertical element extending in a direction perpendicular to the rear surface. The vertical element includes a dielectric bar, an end of which is attached to the rear surface, and a conductive shell covering a side and an opposite end of the dielectric bar to be attached to the conductive plate.