Abstract: A sensor device for a motor vehicle, including a first transmitting antenna, which is situated on a surface of a substrate, has a narrow lobe-type directional characteristic and includes a defined number of planar antenna elements; a second transmitting antenna situated on the surface of the substrate has a wide lobe-type directional characteristic, including a defined number of planar antenna elements, the directional characteristics of the two transmitting antennas being oriented opposite one another by a defined angle, with respect to a boresight; and at least one receiving antenna situated on the surface of the substrate including a defined number of planar antenna elements.

Abstract: A multi-band multi-antenna array includes a ground conductor plane and a dual antenna array. The ground conductor plane includes a first edge and separates a first side space and a second side space. The dual antenna array has a maximum array length extending along the first edge and includes a first antenna and a second antenna. The first antenna includes a first resonant loop and a first radiating conductor line exciting the first antenna generating a first resonant mode and a second resonant mode, respectively, wherein frequencies of the first resonant mode are lower than frequencies of the second resonant mode. The second antenna includes a second resonant loop and a second radiating conductor line exciting the first antenna generating a third resonant mode and a fourth resonant mode, respectively, wherein frequencies of the third resonant mode are lower than frequencies of the fourth resonant mode.

Abstract: A radiating system comprises a radiating structure including two or more radiation boosters for transmission and reception of electromagnetic wave signals, a radiofrequency system and an external port. The radiating system is capable of operation in at least a first and second frequency regions which are preferably separated. The radiofrequency system comprises two or more matching networks and a combining structure at which, in transmission, electromagnetic wave signals from the external port are substantially separated and coupled to each radiation booster based on the frequency of the signals; and, in reception, signals from each radiation booster are combined and coupled to the external port. The radiofrequency system provides impedance matching to the radiating structure in the first and second frequency regions at the external port. An advantage of such radiating system is that signals from the first and second frequency regions are fed to and retrieved in one single port.

Abstract: According to one embodiment, an antenna device includes a branch circuit, a first phase shifter, a second phase shifter and a radiating element. The branch circuit divides an input signal and generates a first signal and a second signal. The first phase shifter is capable of shifting a phase of the first signal. The second phase shifter is capable of shifting a phase of the second signal. The radiating element transmits a right-hand circularly polarized wave based on a first output signal of the first phase shifter and transmits a left-hand circularly polarized wave based on a second output signal of the second phase shifter.

Abstract: A vehicle-to-x communication system, a vehicle including a vehicle-to-x communication system and a method for transmitting vehicle-to-x messages. Instead of having to diversify transmission as is customary when at least two antennae are used, signals are emitted in a suitably split manner via a first antenna or a second antenna.

Abstract: A radio unit housing configured to receive a corresponding antenna and configured such that, when the antenna is received by the radio unit housing an air channel is formed between the radio unit housing and the antenna.

Abstract: A multi-antenna includes a ground plane; a first feeding point; a second feeding point that is different from the first feeding point; a first feed element that is connected to the first feeding point; a second feed element that is connected to the second feeding point, a cancellation electric current being generated in the second feed element; and a radiating element that functions as a radiation conductor when power is supplied by establishing electromagnetic field coupling with the first feed element and the second feed element.

Abstract: An antenna includes a stack of cylindrical lenses combined with feed elements to provide multi-beam coverage for a given wireless communication sector. Each cylindrical lens disc has approximately the same height as the feed elements being used with the lens. To overcome the problem of interference from cables and opposing feeds, feed elements are placed around the lens. The cylindrical lenses are stacked such that a small gap exists between each pair of adjacent cylindrical lenses, allowing for cable lines to pass through between the pair of the cylindrical lenses, and thus removing interference for 360 degree coverage. Cable lines are arranged such that they only traverse the portion of the circumferential surfaces of the cylindrical lenses that do not interfere with the field of view of the RF signals generated by the corresponding feed elements.

Abstract: In a computer-implemented method for automatic network configuration of a pre-configured hyper-converged computing device network configuration information is requested from another pre-configured hyper-converged computing device already configured on a network. The network configuration information is received from the another pre-configured hyper-converged computing device. The network configuration is automatically performed by the pre-configured hyper-converged computing device such that the pre-configured hyper-converged computing device is automatically configured to the network.

Abstract: An antenna device of a magnetic coupling type includes a magnetic body having a plate-like shape; and a coil, which is wound around the magnetic body.

Abstract: A lightweight deployable antenna assembly for, e.g., microsatellites including multifilar (e.g., quadrifilar) antenna (MHA) structures rigidly maintained in an array pattern by a lightweight linkage and collectively controlled by a central antenna feed circuit and local antenna feed circuits to perform phased array antenna operations. The linkage is preferably an expandable (e.g., flexural-scissor-grid) linkage capable of collapsing into a retracted/stowage state in which the MHA elements are maintained in a closely-spaced (e.g., hexagonal lattice close-packed) configuration optimized for payload storage. To deploy the antenna for operation, the linkage unfolds (expands) such that the MHA elements are moved away from each other and into an evenly spaced (e.g., wide-spaced hexagonal) pattern optimized for phased array operations. The MHA structures utilize modified helical filar elements including metal plated/printed on polymer/plastic beams/ribbons, or thin-walled metal tubes.

Abstract: Electronic devices may be provided with antenna structures. The antenna structures may be used in wirelessly transmitting and receiving radio-frequency signals. Antenna structures may be formed from molded dielectric substrates. Patterned conductive material may be formed on the dielectric substrates. The dielectric substrates may be formed from molded materials such as glass or ceramic. Sheets of dielectric or dielectric powder may be compressed to form a dielectric substrate of a desired shape. The patterned conductive material may be formed from metallic paint or other conductors. A hollow antenna chamber may be formed by joining molded dielectric structures. An antenna such as an indirectly-fed loop antenna or other antennas may be formed from the molded dielectric substrates and patterned conductors.

Abstract: The present invention relates to a node (1) in a wireless communication system, the node (1) comprising at least one antenna (2) which comprises an even number (A) of antenna ports (3, 4, 5, 6), at least four, where each antenna port (3, 4, 5, 6) is associated with a corresponding polarization (P1, P2), beam-width and phase center. The antenna ports (3, 4, 5, 6) are connected to a reconfiguration network (7) which is arranged for pair-wise linear combination of antenna ports (3, 4, 5, 6) of mutually orthogonal polarizations to a number (B) of virtual antenna ports (8, 9), which number (B) is equal to half the number (A) of antenna ports (3, 4, 5, 6). The virtual antenna ports (8, 9) correspond to virtual antennas and are connected to corresponding radio branches (10, 11). The present invention also relates to a corresponding method.

Abstract: Multi-band quadrifilar antennas that are suitable for satellite communication include composite elements each of which include multiple conductors operating at different frequencies connected to a bus bar. Each composite element is coupled to a signal feed and to a ground structure.

Abstract: The present invention is an octofilar antenna formed by adding four grounded parasitic arms in between the arms of a conventional air core quadrifilar antenna to negate the problems of mis-matching and strong mutual coupling for quarter-wave small helices. The invention ultra compact air core helix antenna does not suffer from typical dielectric loading effects.

Abstract: An apparatus can be provided that can include a plurality of electric dipole antenna arrangements, and a processing arrangement configured to receive a signal(s) from the electric dipole antenna arrangements, and generate a magnetic resonance image based on the signal(s). Each of the electric dipole antenna arrangements can have at least two poles extending in opposite directions from each other. One of the poles can have a curved shape, which can bifurcate and follow two mirror symmetric S-shapes.

Abstract: An antenna with an FR-4 dielectric material layer includes at least one metallization layer having metallic dipoles organized into two clusters. Each of the two clusters includes metallic dipoles generally elongated along a common axis to produce signals of specific polarization. Each of the two clusters is oriented orthogonal to the other to produce two separate, orthogonally polarized signals. Each of the two clusters is associated with a dedicated stripline feed, positioned and oriented to maximize gain of the radiating element. Power from each stripline planar feed couples to the metallic dipoles through a dedicated aperture in the stripline ground plane.

Abstract: A modal antenna array is described where modal antenna elements capable of generating multiple radiation modes are used to form array radiation patterns. Nulls in the array radiation pattern can be formed and positioned by proper modal antenna element mode selection, with these nulls used to provide interference suppression or mitigation. The shift in array radiation pattern maxima generated by modal element mode selection can be used to improve communication system link quality by optimizing array radiation pattern characteristics. Specifically, a ring or circular array configuration is described where a simplified common feed port can be implemented to feed multiple modal antenna elements used to form the array. A switch can be used to connect or disconnect one modal element from the array, with this feature providing additional unique array beam states. The modal array can be commanded via a look-up table or algorithm.

Abstract: An antenna system includes a ground metal element, a first signal source, a first antenna, a second signal source, a second antenna, an isolation metal element, and a matching circuit. The first signal source is connected to the ground metal element. The first antenna is connected to the first signal source. The first signal source is configured to excite the first antenna. The second signal source is connected to the ground metal element. The second antenna is connected to the second signal source. The second signal source is configured to excite the second antenna. The isolation metal element is disposed between the first antenna and the second antenna, and is configured to improve the isolation between the first antenna and the second antenna. The matching circuit is connected between the isolation metal element and the ground metal element.

Abstract: The present disclosure relates to an antenna module and a mobile terminal having the same, and the antenna module may include a conductive member, a first conductive arm formed at one side of the conductive member to form a first loop along with the conductive member so as to implement a first resonant frequency, a second conductive arm formed at the other side of the conductive member to form a second loop along with the conductive member so as to implement a second resonant frequency different from the first resonant frequency, a first feeding portion formed adjacent to the first conductive arm to feed the first conductive arm and conductive member, and a second feeding portion formed adjacent to the second conductive arm to feed the second conductive arm and conductive member.

Abstract: An antenna arrangement with two horizontal and two vertical array antennas. A first horizontal antenna port and a second vertical antenna port are connected to a first polarization. A first vertical antenna port and a second horizontal antenna port are connected to an orthogonal second polarization. Each port is connected to corresponding antenna elements. The first horizontal antenna port and the first vertical antenna port are connected in phase. The second horizontal antenna port and the second vertical antenna port are connected with opposite phases. A plurality of antenna element symmetry pairs are formed with respect to a common symmetry point. Certain weights are applied to the antenna elements of each symmetry pair, where a weight for a certain polarization in an antenna element in a symmetry pair comprises the complex conjugated weight for an orthogonal polarization in the other antenna element in the symmetry pair.

Abstract: The invention relates to a method for radio communication using one or more tunable antennas and an antenna tuning apparatus, and to an apparatus for radio communication using one or more tunable antennas and an antenna tuning apparatus. An apparatus for radio communication of the invention comprises: 4 antennas, each of the antennas being a tunable passive antenna; a radio device; an antenna tuning apparatus having 4 antenna ports, each of the antenna ports being coupled to one of the antennas through a feeder, the antenna tuning apparatus having 4 radio ports, each of the radio ports being coupled to the radio device through an interconnection; and a tuning control unit, the tuning control unit receiving a tuning instruction generated automatically within the apparatus for radio communication, the tuning control unit delivering a plurality of tuning control signals to the antenna tuning apparatus and to the tunable passive antennas.

Abstract: Antenna structures and methods of operating the same are described. One apparatus includes a processing device that executes an active interference cancellation (AIC) algorithm and radio frequency front-end (RFFE) circuitry coupled to the processing device. The RFFE circuitry includes two RF couplers, and a programmable-delay filter and a vector modulator disposed along electrical path. The AIC algorithm is operable to control the programmable-delay filter to match a delay of the electrical path to a propagation delay in an antenna path. The AIC algorithm is operable to control the vector modulator to adjust a phase, an amplitude or both of a copy of a first RF signal transmitted via the first antenna to generate a second RF signal. The second RF signal is added to a third RF signal via the second RF coupler to remove from the third RF signal interference caused by the first RF signal.

Abstract: Disclosed is an antenna apparatus including a radio frequency (RF) antenna, a magnetic induction (MI) antenna disposed within the RF antenna, and electronic circuitry to receive and process audio received from at least one of the RF antenna and MI antenna.

Abstract: A computing device includes an integrated unit having a plurality of functional components, and an extremely high frequency (EHF) communication unit operatively coupled to the integrated unit. The EHF communication unit includes a transducer configured to transmit and receive EHF electromagnetic signals, and convert between electrical signals and electromagnetic signals. The computing device includes a transceiver operatively coupled to the transducer. The EHF communication unit may enable at least one of the functional components of the computing device to be supplemented by a functional component of an external computing device.

Abstract: An antenna is configured to operate with circularly-polarized electromagnetic radiation in a low-frequency band and in a high-frequency band. The antenna comprises a ground plane and a radiator. The radiator comprises four pairs of radiating elements disposed as pairs of spiral segments on a cylindrical surface having a longitudinal axis orthogonal to the ground plane. Each pair of radiating elements comprises a low-frequency radiating element and a high-frequency radiating element. The low-frequency radiating element comprises a low-frequency conductive strip. The high-frequency radiating element comprises an electrically-connected series of at least one high-frequency conductive strip and at least one high-frequency capacitor. The electrical path lengths of the low-frequency radiating elements and the electrical path lengths of the high-frequency radiating elements are equal.

Abstract: An antenna structure, especially for use with a radio frequency identification reader, includes an array of bifilar antennas mounted on a ground support. Each bifilar antenna includes a pair of bifilar helical elements wound at least partially about a helix axis. Each bifilar element has a ground terminal and a transceiver terminal. Independent radio frequency connectors are connected to the transceiver terminals of each bifilar antenna, and transmit and receive radio frequency signals of arbitrary amplitude and phase to and from the transceiver terminals of each bifilar antenna to obtain and steer an antenna beam, both in azimuth around a boresight of the antenna structure and in elevation angularly away from the boresight.

Abstract: A mobile communication device including an antenna element, a low-frequency blocking element, a first isolation circuit, a second isolation circuit and a high-frequency blocking element is provided. The antenna element converts a radio-frequency signal into an electromagnetic wave and generates a sensing signal in response to a proximity of an object. The antenna element includes a radiation portion and a parasitic portion which are spaced by a coupling gap. The low-frequency blocking element transmits the radio-frequency signal to the radiation portion. The first isolation circuit and a connection element are connected in series between the radiation portion and the parasitic portion, and the first isolation circuit blocks the radio-frequency signal. The second isolation circuit is electrically connected between the parasitic portion and a ground plane, and blocks the sensing signal.

Abstract: A mobile phone comprising a near field communication (NFC) radio transceiver; a near field communication radio antenna; and a coupling component that couples the near field communication radio antenna to the near field communication radio transceiver when selected to a first state and that decouples the near field communication radio antenna from the near field communication radio transceiver when selected to a second state.

Abstract: Methods and systems are disclosed for scalable antenna arrays that may be built up using pluggable tiles that have low distortion, flat band high gain, and structured to channelize the signals into narrow bands that may be 40 MHz or even smaller bandwidth apart. Antenna array tiles may employ traveling wave tube (TWT) components and wafer scale arrays. H-topology, equal length, feed networks connect the signals to antenna elements. The fractal-like, recursively repeating at different size scales, structure for the H-tree feed networks, implemented using pluggable tiles, facilitates the scalability of the high gain waveguide antenna array. System integration across the 75-115 GHz spectral band implements scalable aperture architecture with emphasis on addressing considerations of the TX power requirement, feed network, channelizing signals at different frequency bands using specially designed diplexers and combiners, cooling, component placement, and isolation.

Abstract: Methods and devices are described, including a near-field communications (NFC) or radio frequency identification (RFID) device comprising an NFC or RFID circuit, an antenna having at least a first terminal, a first rectifier connected to the first terminal of the antenna, a switch between the first rectifier and the NFC or RFID circuit, a voltage detector for detecting a voltage in the device caused by a signal received at the antenna, and a control module for controlling the switch, wherein when the voltage exceeds a threshold magnitude, the control module controls the switch to be in an open state and, after a predetermined time period, determines whether the voltage still exceeds the threshold magnitude and, if the voltage still exceeds the predetermined magnitude, controls the switch to be in the open state.

Abstract: A system and method for a wide-band low loss quadrature phase antenna feed system is provided. A 180° phase shifter is configured to generate a 0° and 180° phase output. The phase shifter's outputs are fed into a 90° hybrid coupler to generate 0°, 90°, 180° and 270° outputs for used to feed a quadrature phase antenna.

Abstract: An antenna comprising a plurality of carrier blocks, wherein each carrier block is coupled to at least one other carrier block, and a plurality of radiators, wherein each radiator is connected to at least one carrier block. Further, an antenna comprising a plurality of carrier blocks, wherein each carrier block is coupled with at least one other carrier block, and a radiator connected to at least two of the plurality of carrier blocks.

Abstract: The present invention relates to a communication node (1) comprising at least one antenna arrangement (2) with two horizontal and two vertical array antennas. A first horizontal antenna port (4) and a second vertical antenna port (10) are connected to a first polarization (P1). A first vertical antenna port (8) and a second horizontal antenna port (6) are connected to an orthogonal second polarization (P2). Each port is connected to corresponding antenna elements. Said first horizontal antenna port (4) and said first vertical antenna port (8) are connected in phase. Said second horizontal antenna port (6) and said second vertical antenna port (10) are connected with opposite phases. A plurality of antenna element symmetry pairs (11a, 12a; 11b, 12b; 11c, 12c; 11d, 12d; 13a, 14a; 13b, 14b; 13c, 14c; 13d, 14d) are formed with respect to a common symmetry point (15).

Abstract: Some embodiments relate to a semiconductor module having an integrated antenna structure that wirelessly transmits signals. The semiconductor module has a first die having a first far-back-end-of-the-line (FBEOL) metal layer with a ground plane connected to a ground terminal. A second die is stacked onto the first die and has a second FBEOL metal layer with an antenna exciting element that extends to a position that is vertically over the ground plane. One or more micro-bumps are vertically located between the first FBEOL metal layer and the second FBEOL metal layer. The one or more micro-bumps provide a radio frequency (RF) signal between the first FBEOL metal layer and the antenna exciting element of the second FBEOL metal layer. By using micro-bumps to connect the first and second die, the FBEOL metal layers are separated by a large spacing that provides for good performance of the integrated antenna structure.

Abstract: A wireless communication apparatus includes a first antenna, an antenna driving circuit, a first medium, a second medium, and a second antenna. The antenna driving circuit drives the first antenna. The first medium is electrically connected between the first antenna and the antenna driving circuit. The second medium and the first medium are in energy coupling. The second antenna is electrically connected with the second medium.

Abstract: A method, system and tag for low power radio frequency communication is described. In one embodiment, the RF tag comprises: an access point comprising: a first antenna; a first radio coupled to the first antenna; a central processing unit coupled to the first radio; a backscatter adapter coupled to the access point via a wired communication interface, the backscatter adapter comprising a backscatter radio and a second antenna coupled to the backscatter radio for use in communicating with an RF tag in the network via backscatter.

Abstract: The present invention relates to a node (1) in a wireless communication system, the node (1) comprising at least one antenna (2) which comprises an even number (A) of antenna ports (3, 4, 5, 6), at least four, where each antenna port (3, 4, 5, 6) is associated with a corresponding polarization (P1, P2), beam-width and phase center. The antenna ports (3, 4, 5, 6) are connected to a reconfiguration network (7) which is arranged for pair-wise linear combination of antenna ports (3, 4, 5, 6) of mutually orthogonal polarizations to a number (B) of virtual antenna ports (8, 9), which number (B) is equal to half the number (A) of antenna ports (3, 4, 5, 6). The virtual antenna ports (8, 9) correspond to virtual antennas and are connected to corresponding radio branches (10, 11). The present invention also relates to a corresponding method.

Abstract: A communication system includes a transmitter that includes Nt transmission antenna elements that are arranged in a row, and transmits a signal by a space division multiplexing scheme, and a receiver that includes Nr reception antenna elements that are arranged in a row, and receives a signal by the space division multiplexing scheme, wherein a distance between first and second transmission antenna elements from an end position is different from a distance between the second and third transmission antenna elements from the end position, the Nt transmission antenna elements including the first, second and third antenna elements, and a distance between first and second reception antenna elements from an end position is different from a distance between the second and third transmission antenna elements from the end position, the Nr transmission antenna elements including the first, second and third antenna elements.

Abstract: Multiband antenna decoupling networks and systems including multiband antenna decoupling networks are provided herein. A multiband decoupling network is connected to two or more closely spaced antennas. The multiband decoupling network includes lumped components and is reconfigurable to decouple the two or more antennas at a plurality of distinct communication frequency bands. The multiband decoupling network may include tunable lumped components and be reconfigurable through tuning the tunable lumped components. A pi network may be used for the multiband decoupling network. At least one separate impedance-matching network may also be used to match the input impedance of the multiband decoupling network to the output impedance of transmission lines leading to the multiband decoupling network.

Abstract: A distributed antenna system includes a multiple-input and multiple-output (MIMO) base station configured to output at least a first signal and a second signal. At least one master unit communicates with the MIMO base station. At least one remote unit communicates with the master unit. At least one antenna is coupled with the remote unit for receiving signals from the remote unit. A hybrid coupler is coupled between the remote unit and antenna and is configured to receive the first signal Ch1 and the second signal Ch2 from the remote unit on respective first and second ports and to provide an output signal on at least one output port. The output signal includes at least a portion of the first signal and at least a portion of the second signal. The antenna is coupled with the output port.

Abstract: Methods and apparatuses are disclosed for providing flexible channel information feedback. In some cases this may be according to reporting types assigned by one or more sectors, with different reporting types for each sector. In other cases, a reporting mode is determined to determine the reporting types to be utilized.

Abstract: Methods and apparatus for measuring permittivity having a meander-line ring resonator, which may be disposed on a substrate proximate to and separated from an input coupler and an output coupler thereon, the resonator ring further including a continuous conductive material having at least two turns to form a single congruent pattern, symmetrical along at least one axis.

Abstract: In a high-frequency module, an arrangement order of antenna terminals, transmission-side signal terminals, and reception-side signal terminals in a second direction corresponds to an arrangement order of antenna terminal electrodes, transmission-side terminal electrodes, and reception-side terminal electrodes in the second direction.

Abstract: An integrated circuit includes a first circuit and a second circuit. The first circuit may be configured to generate a plurality of complementary outputs based upon a plurality of inputs, a first control signal, and a second control signal, where the plurality of inputs is received as a serial data stream. The second circuit may be configured to generate one or more pairs of complementary output signals and a plurality of open-drain outputs in response to a third control signal, a fourth control signal, a fifth control signal, and a sixth control signal. A first complementary output of each pair of complementary output signals has a higher current capability than a second complementary output of each pair of complementary output signals.

Abstract: A bookcase system is provided. The bookcase system includes at least adjacently arranged two bookcase units. Each of the bookcase units further includes a first RFID reader having an antenna and placed on a first lateral side of the bookcase unit. The bookcase unit further includes a separating structure placed between two of the adjacently arranged bookcase units. The separating structure may further include at least three metal plates forming a three-layer stacked structure, and a lateral side of each of the metal plates is larger than half of a wavelength of an operating frequency of the antenna. And books are placed along a direction parallel to the lateral side.

Abstract: A low profile antenna array for UWB radar antenna applications is disclosed. It may be used as a mid-range receiving antenna array (RXM) or as a mid-range transmitting antenna array (TXM). In some embodiments, the RXM or the TXM may include a plurality of radiation patch elements formed on a top layer of a printed circuit board (PCB), a distribution feeding network in the mid-layer of the PCB having a patch array, and a serial feeding arrangement from a ?/4 coupling slot to each feeding patch. This antenna may have a desirable large frequency bandwidth with relatively flat antenna gain over a frequency range from 22 GHz to 26.5 GHz. In addition, sidelobe levels for the elevation patterns may be below ?20 dB. Other embodiments are disclosed and claimed.

Abstract: Systems, equipment, and methods for driving antenna systems with pairs of overlaid orthogonal antenna elements are provided herein. In one example, a method of operating a remote radio unit that drives an antenna system is provided. The method includes receiving user communications and control data transferred by a baseband unit. If the control data indicates a beamforming mode, then the method includes generating a first plurality of radio frequency (RF) signals directed to at least one of the pairs of overlaid orthogonal antenna elements for target wireless communication devices. If the control data indicates a multiple input multiple output (MIMO) mode, then the method includes generating a second plurality of RF signals for the plurality of antenna elements, wherein the second plurality of RF signals are directed to non-adjacent ones of the pairs of the overlaid orthogonal antenna elements for the target wireless communication devices.

Abstract: When switching a setting of a communication mode for a transmitting signal to a different communication apparatus from a non-spatial multiplexing mode to a spatial multiplexing mode on the basis of a first communication quality, a switching unit stores the first communication quality as a switchover reference value and then, when the first communication quality in a case of switching the setting of the communication mode for the transmitting signal to the different communication apparatus from the spatial multiplexing mode to the non-spatial multiplexing mode on the basis of a second communication quality is larger than the switchover reference value by a value which is equal to or more than a predetermined value, halts the switchover of the setting, to the spatial multiplexing mode, of the communication mode for the transmitting signal to the different communication apparatus until a predetermined requirement is satisfied.

Abstract: A method of performing receive antenna selection is presented. The method executes a determination operation for a set of receive antennas, determines a maximum result of the determination operation for two of the antennas, eliminates one of the two antennas from the set of antennas, and repeats the determination and elimination process until only a predetermined number of antennas remain in the set. The signals from these remaining antennas are then processed. The present invention reduces receiver complexity and cost.