Abstract: A grid array antenna configured to operate with millimetre wavelength signals, the grid array antenna comprising a plurality of mesh elements and at least one radiation element; each mesh element comprising at least one long side and at least one short side operatively connected to the at least one long side; at least one of: the at least one radiating element, the at least one short side, and the at least one long side having compensation for improved antenna output for improved antenna radiation.

Abstract: Provided is a multi-beam antenna device capable of suppressing an increase in loss of a Rotman lens so as to achieve enhanced gain. ? with respect to ? is set to satisfy the following relation: ?<?, where: ? is a spatial beam-forming angle of an array antenna when viewed from a direction facing a front of the array antenna; and ? is an angle between a center line (8) of a Rotman lens, and a line segment which connects one of a plurality of input ports and an intersecting point S2 of the center line (8) with a curve segment having a plurality of output ports (31), (32), - - - , (3n) arranged thereon.

Abstract: A wireless device having vertically and horizontally polarized antenna arrays can operate at multiple frequencies concurrently. A horizontally polarized antenna array allows for the efficient distribution of RF energy in dual bands using, for example, selectable antenna elements, reflectors and/or directors that create and influence a particular radiation pattern. A vertically polarized array can provide a high-gain dual band wireless environment using reflectors and directors as well. The polarized horizontal antenna arrays and polarized vertical antenna arrays can operate concurrently to provide dual band operation simultaneously.

Abstract: A wireless communication terminal including an antenna that supports first and second frequency bands, an RF circuit connected to the antenna; a shunt circuit connected between a connection point of the antenna and the RF circuit, and a ground, and a control unit that controls the shunt circuit.

Abstract: A distributed control system for an active array antenna system is disclosed. In an exemplary embodiment, the array system employs many transmit/receive (T/R) modules each with an associated radiator element, a phase shifter element and a set of RF switch elements to set the module to transmit or receive modes. The array system is arranged to generate a transmit or receive array beam. The distributed control system in an exemplary embodiment includes an array processor for controlling the array, the processor configured to generate command signals to set the T/R module elements to transmit or receive mode and to steer the array beam to a desired direction. The command signals to steer the array beam include phase slopes common to all T/R modules in a given array or subarray.

Abstract: A communication system includes the following elements: a transmitter including a transmission circuit unit configured to generate an RF signal for transmitting data and an EFC antenna configured to transmit the RF signal as an electrostatic field or an induced electric field; a receiver including an EFC antenna and a reception circuit unit configured to receive and process the RF signal received by the EFC antenna; and an impedance snatching unit configured to make an impedance of the EFC antenna of the transmitter equal to an impedance of the EFC antenna of the receiver. The RF signal is transmitted by electric-field coupling between the EFC antennas, facing each other, of the transmitter and the receiver.

Abstract: Exemplary embodiments are provided of multiband high gain omnidirectional antennas. In one exemplary embodiment, an antenna generally includes first and second radiating elements. The first radiating element is configured to produce a first radiation pattern at a first operating frequency. The second radiating element is configured to produce a second radiation pattern at a second operating frequency. Each of the first and second radiating elements includes a meandering or helical portion.

Abstract: An antenna element includes: a radio transceiver that transmits and receives a radio wave; a signal input pad; a ground layer; an antenna that has a connection portion for electrically connecting the radio transceiver to the ground layer and the signal input pad; a silicon substrate on which the antenna is formed; and an insulating film for electrically insulating the silicon substrate from the antenna. The radio transceiver is disposed on a first surface of the silicon substrate with the insulating film interposed therebetween. The ground layer and the signal input pad are disposed on a second surface of the silicon substrate opposite to the first surface thereof with the insulating film interposed therebetween. The connection portion is disposed to penetrate the silicon substrate.

Abstract: A front-end circuit includes a signal path and a first antenna port. A first antenna switch is electrically connected to the first antenna port. A second antenna port is electrically connectable or connected to the signal path. An antenna termination circuit is electrically connected to the first antenna switch. The antenna termination includes an impedance element. The first antenna switch electrically connects the first antenna port to the antenna termination circuit when the signal path is electrically connected to the second antenna port.

Abstract: A quadrifilar antenna having helical windings is fed by a phase shift feed network, each winding having an open circuit termination element, the phase shift feeding network having forward directional phase shift paths from a feed input to phase shift feed output ports, and having a first reverse directional transmission path from one or more of the phase shift feed output ports back to a first isolation port, and a second reverse directional transmission path from another one or more of the phase shift feed output ports back to a second isolation port, the first and second isolation ports isolated from the forward directional phase shift paths, and a differential termination impedance, floating from ground, connected the first and second isolation ports. Optionally, the differential termination impedance is frequency selective.

Abstract: A microstrip antenna that can be linear, co-circular, or dual-circularly polarized having co-planar radiating elements and operating at dual frequency bands wherein an inner radiating element is surrounded by and spaced from an outer radiating element. Each radiating element resonates at a different frequency. In one embodiment of the invention a feed network has a single, cross-shaped, feed line that is positioned between the inner and outer radiating elements and capacitively coupled to the inner and outer radiating elements. In another embodiment of the present invention, the radiating elements are fed separately by first and second feed networks each having a plurality of feed points. The radiating elements each have one active feed point that is either directly or indirectly coupled to its respective feed network.

Abstract: In one embodiment, a wide bandwidth, reduced depth transmit/receive antenna array includes unit cells having continuous slots, a transceiver, unbalanced feeds, impedance transformers, and exciters. The continuous slots are formed in a conductive antenna plane, and the transceiver generates and/or receives electrical signals. The unbalanced feeds may be electrically connected between the transceiver and impedance transformers which match the impedance between feed lines and the exciter. They may be located in a plane perpendicular to the direction of propagation of the radiation, and also may be arranged between the conductive antenna plane and a backplane. The exciter spans a continuous slot, and emits and/or receives radiation from the slot. The antenna array is capable of operating without a radome or balun.

Abstract: An antenna for communicating with mobile devices in a land-based cellular communication system via an antenna beam having a width, azimuth angle and downtilt angle. The antenna includes: a two dimensional array of radiating elements (31-34); and a feed network (35-39) from a feed line to the radiating elements. The feed network includes: downtilt phase shifting means (35,36) for varying the phase of signals supplied to or received from the radiating elements so as to vary the downtilt angle of the antenna beam; azimuth phase shifting (38,39) means for varying the phase of signals supplied to or received from the radiating elements so as to vary the azimuth angle of the antenna beam; and beam width adjustment means (37) for varying the power or phase of signals supplied to or received from the radiating elements so as to vary the width of the antenna beam.

Abstract: A method for installing radiator elements arranged on different planes and an antenna having the radiator elements are provided, in which a first-position radiator element is placed on one plane, a second-position radiator element is placed on another plane, and power supply cables are connected to the first-position radiator element and the second-position radiator element. The power supply cables are designed to compensate for a phase difference between signals radiated in the air from the first-position radiator element and the second-position radiator element by a phase difference between signals propagated via the power supply cables.

Abstract: Architectures and implementations of a transceiver system for wireless communications are presented, the system including one or more antennas supporting a single frequency band or multiple frequency bands, a transmit circuit, a receive circuit, and an isolation circuit that is coupled to the one or more antennas and the transmit and receive circuits and provides adequate isolation between the transmit circuit and the receive circuit.

Abstract: The invention discloses a leaky-wave dual-antenna system comprising a transmitting antenna array and a receiving antenna array. The transmitting antenna array comprises plural first microstrips and plural corresponding first differential circuits, and each of the first differential circuit matches the corresponding first microstrip by a L-type matching network; the receiving antenna array comprises plural second microstrips and plural corresponding second differential circuits, and each of the second differential circuit matches the corresponding second microstrip by a L-type matching network. A first end and a second end of each of the first differential circuits are respectively connected to the corresponding first microstrip; a third end and a fourth end of each of the second differential circuits are respectively connected to the corresponding second microstrip.

Abstract: An apparatus includes first and second speakers, and an antenna including a first pair of wires connected to the first speaker, a second pair of wires connected to the second speaker, and a conductive sleeve surrounding portions of the first and second pairs of wires, the sleeve forming a coaxial capacitor with the first and second pairs of wires. The apparatus can further include an inductor connected between the first and second pairs of wires and the sleeve, to form a resonant circuit with the coaxial capacitor.

Abstract: A cross-polarized antenna includes a substrate, a first impedance converter, a second impedance converter, a first cross-polarized antenna, and a second cross-polarized antenna. The first cross-polarized antenna has a first opening corresponding to a second opening in the second cross-polarized antenna, in which the two openings cross each other in space without contacting. The antenna is capable of receiving electromagnetic waves from different polarization directions effectively, thereby reducing the polarization loss. Besides, as the antenna is integrally formed, the manufacturing and assembling process thereof are simplified, thus lowering the manufacturing cost.

Abstract: An apparatus, system, and method are disclosed for safely and securely storing materials. A plurality of smart tiles sense traffic and generate traffic data. A network transmits the traffic data from the smart tiles. A computer determines a plurality of normal traffic patterns from the traffic data. In addition, the computer detects an abnormal traffic pattern from the traffic data. The computer activates a security response in response to the abnormal traffic pattern.

Abstract: An antenna system including at least one flexible dielectric sheet, a plurality of individual antennas mounted on the at least one flexible dielectric sheet, a feed network mounted on the at least one flexible dielectric sheet, the feed network being connected to and feeding the individual antennas and at least one conductive ground plane mounted on the at least one flexible dielectric sheet.

Abstract: A plurality of antenna electrodes 11, 12, 13, 14 on a substrate 1 can be connected to a ground electrode on the substrate 1 via connectors at spots 11A-11C, 12A-12C, 13A-13C, and 14A-14C. Each connector can be opened/closed by a switch; or provided with a impedance varying device. Any one of the antenna electrodes may be connected to the ground electrode by the switch or the impedance varying device. The radio wave beam outputted from this antenna electrode shifts in phase from the radio wave beams outputted from the other antenna electrodes, whereby the direction of the integrated radio wave beam is inclined. Connecting one or another of the spots 11A-11C, 12A-12C, 13A-13C, and 14A-14C to the ground electrode changes the direction and the magnitude of the integrated radio wave beam.

Abstract: An antenna device of the invention comprises divider/combiner means 12 that divides or combines a received signal into signals having a first phase distribution represented by an odd function, phase adding/removing means 14-1 that adds phases having a second phase distribution represented by an even function to the signals, or removes the phases from the signals, and a plurality of antenna elements 20 arranged in an array configuration, that transmits or receives the signals to which the phases have been added.

Abstract: A frequency reconfiguration array antenna includes a metal plate and a plurality of antenna elements. The antenna element includes a plurality of radiators and at least one switch for connecting the radiators, and a gain of at least one frequency bandwidth from among the plurality of frequency bandwidths reconfigured by the antenna elements is higher than gains of other frequency bandwidths.

Abstract: A structural phased array antenna and method for manufacturing are disclosed. An integrated structural antenna aperture can be used to reduce net weight, cost, and volume where an array of antenna elements are incorporated into a structural member, e.g. in a spacecraft. A structural material layer, such as a structural foam, may be used with the array of individual antenna element cavities machined into the layer. The antenna element cavities are lined with a conductive material, such as plated aluminum. Facesheets may be bonded to the front and/or backside of the structural material layer in order to increase strength and/or stiffness using an RF transparent material. The array of antenna elements may be coupled to filters at the back side of structural material layer.

Abstract: An array antenna may include a substrate, an array of metamaterial elements including radiating elements suspended in the substrate and integrated with the array of dipoles, where the metamaterial elements include a first metal layer and a second metal layer connected by a via, an array of dipoles, a groundplane coupled with a first side of the substrate, the ground plane having a symmetric slot aperture and not contacting the array of metamaterial elements, and a stripline feed for the radiating elements, where the stripline feed passes from a groundplane first side through the symmetric slot aperture to a groundplane second side.

Abstract: To provide a dual polarized antenna capable of reducing correlation between antenna elements. A dual polarized antenna is constituted by a vertically polarized antenna and a horizontally polarized antenna formed on a printed circuit board and radiates two kinds of polarized waves.

Abstract: Antenna arrays which can work simultaneously in various frequency bands thanks to the physical disposition of the elements which constitute them, and also the multiband behavior of some elements situated strategically in the array. The configuration of the array is described based on the juxtaposition or interleaving of various conventional mono-band arrays working in the different bands of interest. In those positions in which elements of different multiband arrays come together, a multiband antenna is employed which covers the different working frequency bands. The advantages with respect to the classic configuration of using one array for each frequency band are: saving in cost of the global radiating system and its installation (one array replaces several), and its size and visual and environmental impact are reduced in the case of base stations and repeater stations for communication systems.

Abstract: In one embodiment, an integrated circuit antenna array is provided that includes: a low-voltage substrate supporting an RF transmission network, and a high-voltage substrate bonded to the low-voltage substrate, the high-voltage substrate supporting a plurality of antennas coupled to the RF transmission network through switch-mode power amplifiers integrated into a surface of the high voltage substrate.

Abstract: Systems and methods of training antennas for two devices equipped with phased array antennas in a wireless network are disclosed. In one embodiment, the methods include transmitting a plurality of estimation training sequences from a transmit phased array antenna to a receive phased array antenna, wherein a length of at least one of the plurality of training sequences is adapted to a number of antenna elements at one of the transmit and receive phased array antennas. The methods further include transmitting data to the receive phased array antenna via the transmit phased array antenna tuned with a transmit beamforming vector (BV) selected based at least in part on the plurality of estimation training sequences.

Abstract: In an antenna structure having a plurality of serially fed patch elements, at least one of the patch elements has a slot coupling to the continuation of the feed line for influencing the radiation of this patch element.

Abstract: A base transceiver station (BTS) identifies the number of currently connected antenna units by receiving a signal to which 1 is added in each antenna unit via a signal line (16) connecting the antenna units (AU1 to AUn) in series. The target output power of each antenna unit, which is obtained by dividing the total target output power of the antenna units by the number of currently connected antenna units, is passed to each antenna unit via a signal line (14) connecting the antenna units in series. Each antenna unit controls the gain of a variable gain amplifier so that its output power becomes equal to the target output power.

Abstract: A phased array for controlling a radiation pattern of an array of antennas includes a plurality of antenna ports, a first tunable element connected in series between each respective pair of adjacent antenna ports, and a second tunable element connected in parallel with each respective antenna port. The phased array provides progressive phase differences between successive antenna ports Equal amplitude of the signal can be maintained at each antenna. An equal amount of successive phase change can be provided in a signal at each antenna. A direct current source connectible to at least one input port can include an alternating power source through a matching circuit, such as a quarter-wave transformer The first and second tunable elements can be either an inductor or a capacitor, and/or can be in combination with transmission lines separating each respective antenna from a successive antenna by desired fraction of a wavelength.

Abstract: The invention concerns a network for distributing a plurality of input microwave signals into a plurality of output signals having a Gaussian amplitude and in-phase distribution per said input signal, the network comprising: a plurality of N input ports providing N different input signals; a plurality of M output ports, M being a multiple number of N; a plurality of P layers disposed between the inputs ports and the outputs ports, the input signals being distributed through these layers, each layer comprising an arrangement of power combiners (C) and/or power dividers (D), the arrangement is self similar with an angular rotation of k2?/N radian around the symmetry axis (AA?) of the polygonal closed shape formed by said input ports, k being an integer comprised between 1 and N.

Abstract: An antenna for communicating with mobile devices in a land-based cellular communication system via an antenna beam having a width, azimuth angle and downtilt angle. The antenna includes: a two dimensional array of radiating elements (31-34); and a feed network (35-39) from a feed line to the radiating elements. The feed network includes: downtilt phase shifting means (35,36) for varying the phase of signals supplied to or received from the radiating elements so as to vary the downtilt angle of the antenna beam; azimuth phase shifting (38,39) means for varying the phase of signals supplied to or received from the radiating elements so as to vary the azimuth angle of the antenna beam; and beam width adjustment means (37) for varying the power or phase of signals supplied to or received from the radiating elements so as to vary the width of the antenna beam.

Abstract: A communication system includes the following elements: a transmitter including a transmission circuit unit configured to generate an RF signal for transmitting data and an electric-field-coupling antenna configured to transmit the RF signal as an electrostatic field; a receiver including an electric-field-coupling antenna and a reception circuit unit configured to receive and process the RF signal received by the electric-field-coupling antenna; and a surface-wave propagation medium configured to provide a surface-wave transmission line to transmit a surface wave emanating from the electric-field-coupling antenna of the transmitter with low propagation loss.

Abstract: To make it possible to suppress degradation in characteristics by electromagnetic coupling between plurality of antennas and to cope with miniaturization of a housing even if a plurality of radio circuits operate simultaneously. In a mobile radio apparatus in which a circuit board 102, a first antenna 111 and a second antenna 112 are mounted in a housing 101, a first radio section 121 and a second radio section 122 are mounted in the circuit board 102 and the first radio section 121 and the second radio section 122 can operate simultaneously, a reactance element 131 for influencing an operating frequency of the first radio section 121 or the second radio section 122 is disposed in at least one of the first antenna 111 and the second antenna 112 when an electric length of the circuit board 102 is configured to be shorter than one-fourth a wavelength of at least one of the operating frequencies of the first radio section 121 and the second radio section 122.

Abstract: A communication system includes a transmitter including a transmission circuit unit that generates an RF signal for transmitting data and an electric-field-coupling antenna that transmits the RF signal as an electrostatic field, a receiver including an electric-field-coupling antenna and a reception circuit unit that subjects an RF signal received by the electric-field-coupling antenna to reception processing, and a surface-wave propagating means for providing a surface wave transmission line made of a conductor that propagates a surface wave radiated from the electric-field-coupling antenna of the transmitter along a surface of the surface wave transmission line.

Abstract: An antenna array core comprising a plurality of microwave modules, a control layer, a mounting layer, and a signal distribution layer. The control layer is capable of distributing control signals to the plurality of microwave modules. The plurality of microwave modules are attached to an upper surface of the mounting layer and the mounting layer is made from a heat conductive material capable of cooling the plurality of microwave modules. The signal distribution layer is located below the mounting layer, wherein the signal distribution layer is capable of transmitting microwave signals to the plurality of microwave modules and wherein the arrangement of the plurality of microwave modules on the mounting layer, the control layer, and the wave distribution network form a layered architecture for the antenna core. The architecture is a balance between, size, thermal control, manufacturability, cost, and performance so as to be a unique solution.

Abstract: A dual beam electronically scanned phased array antenna architecture including a plurality of antenna modules orthogonally connected to a signal distribution board. Each module includes a radiator board orthogonally connected to a first end of a support mandrel. Each radiator board includes RF radiators and a pair of chip carriers mounted to opposing sides of the respective mandrel and interconnected to the respective radiator board. Each module includes a signal transfer board formed to fit around a second end of the mandrel such that it is compressed between the mandrel and the signal distribution board, and a pair of signal distribution bridges mounted to the opposing sides of the mandrel. Each signal distribution bridge interconnects respective chip carriers with the signal transfer board and distributes digital, DC and/or RE signals received from the signal transfer board to a plurality of beam scanning circuits included in the respective chip carrier.

Abstract: In one embodiment, an integrated circuit antenna array is provided that includes: a low voltage substrate supporting an RF transmission network, and a high voltage substrate bonded to the low voltage substrate, the high voltage substrate supporting a plurality of antennas coupled to the RF transmission network through power amplifiers integrated into a surface of the high voltage substrate.

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: In one embodiment, a device is disclosed that includes: a first substrate, a plurality of antennas adjacent the first substrate; a plurality of oscillators integrated in the first substrate, each oscillator providing an output signal to drive a corresponding subset of the antennas; and a plurality of photodetectors corresponding to plurality of oscillators, each oscillator being adapted to injection lock its output signal to an electronic photodetector signal from the photodetector produced in response to an illumination of the photodetectors with a free-space optical signal modulated such that the photodetector signals are globally synchronized with each other, whereby the output signals driving the plurality antennas are also globally synchronized across the plurality of antennas.

Abstract: An antenna device of the invention comprises divider/combiner means 12 that divides or combines a received signal into signals having a first phase distribution represented by an odd function, phase adding/removing means 14-1 that adds phases having a second phase distribution represented by an even function to the signals, or removes the phases from the signals, and a plurality of antenna elements 20 arranged in an array configuration, that transmits or receives the signals to which the phases have been added.

Abstract: The present invention provides an improved single, light weight, compact integrated multi-antenna system for simultaneous reception and transmission of energy at multiple different frequencies without interfering with each other. The system includes an enclosure having a shield positioned at about its midpoint for secure placement of a first antenna on the top of the shield and second antenna on the bottom of the shield. The shield is fabricated and positioned to provide both a secure placement of the antennas and to block or attenuate the frequency signals of the first antenna to reach the second antenna and vice versa. The system further includes an interface coupled between the first and the second antenna to share data signals among each other.

Abstract: An antenna formed of multiple sub-arrays, each having rows of interconnected radiating elements. One row of radiating elements is shared between two sub-arrays by a coupler which isolatingly couples one row of radiating elements to each of two sub-arrays allowing the feed to the two sub-arrays to be isolatingly applied to the shared row of radiating elements while suppressing grating lobe generation and providing high sub-array isolation.

Abstract: An antenna for a mobile terminal includes a substrate, a dipole placed on the substrate, a loop placed on the substrate, and a matching circuit on the substrate. The matching circuit comprises at least one of a variable capacitor or a variable inductor. The radiation center of the loop substantially coincides with the radiation center of the dipole.

Abstract: A technique for improving radio coverage involves using interdependently tuned directional antennas. An example according to the technique is a substrate including two antennas, a transceiver, and a connector. Another example system according to the technique is a wireless access point (AP) including a processor, memory, a communication port, and a PCB comprising a plurality of directional antennas and a radio. An example method according to the technique involves determining a voltage standing wave ratio (VSWR) and interdependently tuning a first and second directional antenna to reach an expected radiation pattern.

Abstract: A thermal management system includes an air duct assembly comprising a supply air duct having an air inlet opening, a return air duct having an air exit opening and a plurality of distribution air ducts configured to be in fluid communication with the air inlet opening of the supply air duct and with the air exit opening of the return air duct. A fan is disposed within the air duct assembly to direct air from the air inlet opening of the supply air duct through the supply air duct and out the air exit opening of the return air duct. The fan and supply duct are disposed to direct air over a first surface of a heat sink. A second opposing surface of the heat sink is disposed over and configured to be in thermal contact with a plurality of active circuits disposed on a first surface of a radio frequency (RF) multi-layer printing wiring board (PWB).

Abstract: In one embodiment, an integrated circuit antenna array is provided that includes: a first substrate, a plurality of antennas adjacent the first substrate; an RF network adjacent the first substrate, and a plurality of distributed amplifiers integrated with the first substrate and coupled to the RF network, each distributed amplifier including a varactor configured to load the RF network with a variable capacitance responsive to a control signal, wherein the RF network and the distributed plurality of amplifiers are configured to form a resonant network such that if a timing signal is injected into an input port of the RF network, the resonant network oscillates to provide a globally synchronized RF signal to each of the antennas, and wherein a resonant oscillation of the resonant network is tunable responsive to the control signal.

Abstract: Apparatus, systems and techniques for using composite left and right handed (CRLH) metamaterial (MTM) structure antenna elements and arrays to provide radiation pattern shaping and beam switching.