Abstract: A controlled power supply comprising: a) an array of low voltage current sources; b) a plurality of switch power supplies coupled to each of the storage capacitors and respective ones of the pulse loads being coupled to each of the switch power supplies; c) each of the storage capacitors being configured for storing energy during an inactive portion of a load switching cycle of the respective switch power supply to which the corresponding storage capacitor is coupled when the pulse loads are inactive; d) a respective output capacitor in association with each of the switch power supplies for feeding voltage to the respective pulse loads during an active portion of the load switching cycle; and e) the respective storage capacitor being configured for supplying the stored energy via the respective to the respective switch power supply to which the storage capacitor is coupled to each of the pulse loads coupled to switch power supply during an active portion of the load switching cycle.

Abstract: Provided is an antenna device, including insulating base substrate (190), first monopole antenna (110), and second monopole antenna (120), the antennas being disposed on insulating base substrate (190), wherein first monopole antenna (110) and second monopole antenna (120) have: first portions extended in a same direction from power feeding ends connected to first power feeding section (180); and second portions extended from the first portions separately to left and right sides, and first passive element (130) is disposed between the first portion of first monopole antenna (110) and the first portion of second monopole antenna (120).

Abstract: An antenna comprises notched semi-elliptical radiators. Each of the radiators has a first substantially planar surface. A ground plane has a second substantially planar surface that is generally parallel to the first substantially planar surfaces of the radiators by a generally uniform spacing. The ground plane has a central axis. Feeding members are adapted for conveying an electromagnetic signal to or from each radiator. Each of the feeding members is spaced radially outward from the central axis of the ground plane. A grounded member is coupled to each radiator and spaced apart, radially outward from the feeding spacer.

Abstract: An antenna capable of receiving both left-hand circularly polarized (LHCP) signals and right-hand circularly polarized (RHCP) signals, and outputting both signals on a single feed. The antenna includes two coplanar concentric patches. The inner patch is substantially square. The outer patch surrounds the inner patch to define a gap therebetween. A resonant parallel inductive/LC circuit interconnects the two patches. The circuit includes a plurality of printed traces within the gap and interconnecting the concentric patches. The gap and each trace function as an LC circuit.

Abstract: A diversity antenna module comprising a first radiating element adapted to operate with a first transceiver circuit operating in at least one band and a second radiating element adapted to operate with a second transceiver circuit operating in at least one band. The first radiating element is disposed along a first side of a substrate and the second radiating element is disposed along a second side of the substrate, wherein the first and second sides are substantially parallel to each other, the first and second radiating elements being spatially dispersed from each another by a distance.

Abstract: The present invention refers to a triple-band antenna array for cellular base stations operating at a first frequency band and at a second frequency band within a first frequency range, and also at a third frequency band within a second frequency range. Said triple-band antenna array comprises a first set of radiating elements operating at the first frequency band, a second set of radiating elements operating at the second frequency band, a third set of radiating elements operating at both the third and the first frequency bands, and a fourth set of radiating elements operating at both the third and the second frequency bands. The radiating elements are arranged in such a way that at least some of the radiating elements of the first set are interlaced with at least some of the radiating elements of the third set, and at least some of the radiating elements of the second set are interlaced with at least some of the radiating elements of said fourth set.

Abstract: A method and system for producing an electromagnetic field that exhibits a strong near field that is sufficient to deactivate an electronic article surveillance, EAS, tag and a weak far field that is insufficient to deactivate the EAS tag are disclosed. According to one embodiment, two half-wavelength dipoles spaced apart by about a half-wavelength are excited by oppositely phased signals.

Abstract: There are provided an antenna apparatus and a method of handover using the antenna apparatus. The antenna apparatus may comprise a plurality of antenna elements forming a plurality of beams in a predetermined service area. The plurality of antenna elements are arranged in a plurality of rows, and a number of antenna elements included in an uppermost row of the plurality of rows is smaller than a number of antenna elements included in a downmost row of the plurality of rows, and differences between center angles of beams formed by the antenna elements included in the downmost row are larger than differences between center angles of beams formed by the antenna elements included in the uppermost row.

Abstract: There is provided an antenna device including a first antenna including a first power supply section, a first short-circuited section connected to a bottom board, and a first open-circuited section, and a second antenna including a second power supply section separated from the first power supply section by an electric path length of about n?/4, a second short-circuited section connected to the bottom board, and a second open-circuited section.

Abstract: An antenna with improved radiation efficiency is provided. The antenna includes an antenna array proximately coupled to a feed line. The antenna array includes a plurality of resonating lines. Each resonating line includes a plurality of axially aligned resonators. The resonators have a resonating surface. The resonating surfaces of the resonators at the ends of the resonating lines are larger than resonating surfaces of the resonators in the middle of the resonating lines. Power is supplied to each resonating ling through a feed line. Electrical field is uniformly distributed along the antenna array so as to improve the radiation efficiency of the antenna.

Abstract: The invention provides an apparatus and a corresponding method for controlling radiation characteristics of a transmitter of a wireless device. The wireless device includes a transmitting portion that includes one or more antennas that are characterized by one or more radiation patterns. The wireless device further comprises a sensor system for determining an orientation of the transmitting portion and a control system that is operatively coupled to the sensor system and configured to control the supply of power to each antenna depending on the orientation of the transmitting portion.

Abstract: An antenna includes a radiating element with a shape substantially conforming to a quadrilateral, a grounding and feed-in element, substantially surrounding the radiating element and having an opening formed near to a fourth side of the radiating element, wherein the grounding and feed-in element is electrically connected to a ground at one side of the opening and is electrically connected to a signal feed-in terminal at another side of the opening, a first connection element, having a terminal electrically connected to a first side and the fourth side of the radiating element, and another terminal electrically connected to the grounding and feed-in element, and a second connection element, having a terminal electrically connected to a third side and the fourth side of the radiating element, and another terminal electrically connected to the grounding and feed-in element.

Abstract: In accordance with embodiments of the invention, RFID network control devices (RNCDs) are provided wherein RFID traffic signals from any one of multiple RFID readers may be routed to any of the RFID antennas coupled to the RNCD. Each reader coupled directly or indirectly to the RNCD, either through its own action or the action of the external host controller managing the reader, may issue commands to the RNCD, over the same cable used to carry RFID traffic signals, and cause the RNCD to set its internal switch configuration such that a channel is established for RFID traffic signals between that reader and a particular RFID antenna coupled to the RNCD. This may include commands from the reader or external host controller which place other intervening RNCD units in a bypass state so as to establish the required communications channel with a minimum of signal strength loss.

Abstract: The antenna includes a first ground plate, a first dielectric substrate formed on the first ground plate, a transmission line made of a conductive material formed on the first dielectric substrate, and a plurality of antenna elements electromagnetically coupled to the transmission line. The transmission line is constituted of at least one first line serving as a resonator having a resonator length equal to (2n?1)/2 times (n being a positive integer) a guide wavelength of the transmission line and a plurality of second lines each having an electrical length longer than half the guide wavelength, the first and second lines being disposed alternately at predetermined intervals. Each of the antenna elements is electromagnetically coupled to a corresponding one of the second lines.

Abstract: A multi-antenna device includes a grounding plate, a first antenna and a second antenna. The first antenna includes a first feed element that is grounded to the grounding plate via a first feed point. The second antenna includes a second feed element that is grounded to the grounding plate via a second feed point. The first feed point and the second feed point are disposed such that a straight line connecting the first feed point and a center of the grounding plate and a straight line connecting the second feed point and the center of the grounding plate are substantially perpendicular to each other in a plan view.

Abstract: A method and system provides a multiple input multiple output (MIMO) antenna arrangement in a wireless communication device. A first antenna element and a second antenna element co-located within a same antenna volume are respectively coupled to first and second antenna feeds proximate to a base perimeter segment of a device chassis. The first antenna feed is at a pre-calculated distance from the second antenna feed. The second antenna element, a first MIMO antenna, is coupled to an antenna ground positioned proximate to the first antenna feed and at a pre-determined distance from the second antenna feed. A third antenna element operating as a second MIMO antenna is placed proximate to a top perimeter segment of the device chassis. The antenna arrangement achieves (a) low correlation between the MIMO antennas and (b) an acceptable or pre-determined level of antenna isolation between the first antenna element and the second antenna element.

Abstract: A MIMO antenna used in both transmit and receive operations, with the ability to serve an n-by-n MIMO transceiver architecture (where n can take integer values between 0 to 4). The structure is designed to increase the effective area of the array by coupling the bars of the antenna to the disc and results in good isolation and low envelope correlation.

Abstract: A diversity antenna system that operates within a low frequency band ranging from 700 Megahertz is disclosed. A plurality of antennas are folded onto a single printed circuit in a meander pattern configuration. Each antenna has an independent feed port and ground pin. The plurality of antennas are configured within a compact mobile phone space to produce a high isolation and low correlation at resonating frequencies within the 700 Megahertz frequency band.

Abstract: A diversity antenna module comprising a first radiating element adapted to operate with a first transceiver circuit operating in at least one band and a second radiating element adapted to operate with a second transceiver circuit operating in at least one band. The first radiating element is disposed along a first side of a substrate and the second radiating element is disposed along a second side of the substrate, wherein the first and second sides are substantially perpendicular to each other, the first and second radiating elements being spatially dispersed from each another by a distance.

Abstract: A vertically interleaved in-building distributed antenna system is described. The in-building distributed antenna system includes a multiple-input and multiple-output (MIMO) radio. The MIMO radio includes a first branch connector and a second branch connector. The in-building distributed antenna system further includes a first branch transport medium coupled to the first branch connector and a second branch transport medium coupled to the second branch connector. The in-building distributed antenna system further includes a plurality of antennas. The plurality of antennas includes one or more first branch antennas coupled to the first branch transport medium and one or more second branch antennas coupled to the second branch transport medium. The first branch antennas are vertically interleaved with the second branch antennas in the structure.

Abstract: A multiband antenna for a mobile device is disclosed. The mobile device includes a multiband antenna configured to communicate with a base station. The multiband antenna includes a ground plane, a ground plane extension, and a plurality of antenna arms. The ground plane, the ground plane extension, and the plurality of antenna arms are configured to communicate signals in multiple frequency bands, where the ground plane and the ground plane extension have a length proportional to approximately a quarter wavelength of a frequency in the multiple frequency bands. The mobile device further includes a modulator and demodulator configured to modulate signal for transmission and demodulate signal received from the base station, and a controller configured to control communication of signals using the multiband antenna and the modem.

Abstract: The present invention relates to a multi-input multi-output (MIMO) antenna with a multi-band characteristic which includes a plurality of MIMO antenna, each having a pair of antenna elements, to support multiple bands, and is capable of guaranteeing high antenna efficiency for different bands by minimizing an interference between antenna elements of each MIMO antenna to improve an isolation characteristic. The MIMO antenna system having a multi-band characteristic, which includes two pairs of antenna patterns to support different band and coupling antenna parts separated from and coupled with the pairs of antenna patterns, can improve an isolation through the coupling antenna parts and guarantee an antenna gain. Moreover, since signal interference caused by the coupling effect can be cancelled to guarantee a band width with no change in antenna characteristics, it is possible to constructing two or more antennas to support a multi-band while guaranteeing stable operation of the antennas.

Abstract: An end fire antenna apparatus built in an electronic apparatus includes a printed circuit board (PCB), at least one main antenna built in the PCB and configured to radiate a radio wave, and a ground plate disposed on a side surface of the PCB, the ground plate being electrically isolated from the at least one main antenna. The at least one main antenna has a pillar shape uniformly extending along a thickness direction of the PCB.

Abstract: Antenna assemblies are provided for receiving and transmitting radio frequency signals over an enhanced frequency band. An assembly includes an electrically conductive ground reference and a radiative element formed from an electrically conductive material and comprising an apex. The radiative element is electrically connected to an antenna feed at the apex and configured such that the radiative element lacks two-fold rotational symmetry around a first axis coinciding with the antenna feed. The radiative element extends such that a distance between the radiative element and the electrically conductive ground reference increases as a radial distance from the first axis along the radiative element increases.

Abstract: The invention provides an antenna arrangement for a wireless communication system arranged to have at least one transmit mode and at least one receive mode, the arrangement comprising at least three directional antennas in an antenna configuration. Each directional antenna is arranged to have an azimuthal radiation pattern shaped as a beam, each beam covering an angular sector, such that a combined radiation pattern of all beams in a first transmit mode is arranged to provide a full 360° omnidirectional coverage. By combining localization and polarization of the directional antennas an omnidirectional radiation pattern substantially without null-depths in the azimuthal plane can be created when the radiation pattern of the directional antennas are combined.

Abstract: A wireless access gateway for communication of wave signals at radio frequencies within a frequency band, includes an access gateway enclosed in a housing including a bottom wall and a main circuit board overlying the bottom wall and having an upper surface substantially parallel to the bottom wall. The gateway is equipped with an antenna system including at least two antennas: a first linearly polarized antenna for propagating a first wave signal along a first polarization axis including a first radiating element extending along a first longitudinal axis lying on a first plane substantially parallel to the base plane, and a second linearly polarized antenna for propagating a second wave signal along a second polarization axis oriented perpendicularly to the first polarization axis, the second antenna including a second radiating element extending along a second longitudinal axis lying on a second plane oriented perpendicularly to the first plane.

Abstract: The height of crossed-dipoles antenna elements can be reduced by including an additional bend/segment in the feed-line and/or tuning-stub of the antenna dipole having the upper slot. The extra bend allows the crossed-dipoles antenna element to be shortened by as much as twenty percent without reducing the feed-line length. Additionally, the height of crossed-dipoles antenna elements can be reduced by shaping a winged portion of the balun-fed dipoles to match the contour of a radome contour, which allows the crossed-dipoles antenna element to accommodate a shallower radome and achieve a thinner antenna module. Additionally, the height of crossed-dipoles antenna elements can be reduced by positioning periodic structures around the base of low-band radiating elements to provide artificial magnetic conductor (AMC) functionality, which enables constructive interference between reflected and non-reflected signals at profile spacings of less than one-quarter wavelength.

Abstract: Antenna systems for receiving transmitted signals comprising at least a first tuned antenna disposed in a known relationship spatially with a second antenna, with the first tuned antenna electrically connected to the second antenna, are disclosed. The antenna system may be configured to allow the antennas to reliably discriminate between left-hand and right-hand polarized circular signals.

Abstract: A method for manufacturing an array antenna having a design phase, including synthesizing an array layout of the array antenna and choosing or designing radiating elements to be arranged according to the array layout; and a phase of physically making the array antenna, including arranging the radiating elements according to the array layout; the design phase having the steps of: a) synthesizing an array layout complying with a required minimum beamwidth, a required field of view, a required side lobe level and a target angular dependence of the maximum directivity of the array antenna over the required field of view; b) determining shaped radiation patterns of the radiating elements in order to approximate said target angular dependence of the maximum directivity of the array antenna over the required field of view; and c) choosing or designing radiating elements having the shaped radiation patterns determined at step b).

Abstract: An antenna comprises a plurality of tiles forming an antenna plane, each of said tiles comprising a plurality of radiating elements. Each radiating element comprises a metallic upper patch disposed above a metallic lower patch, the two patches being separated by a layer insulating them electrically. The lower patch is fed with electric current. Each radiating element comprises a conducting frame disposed parallel to the antenna plane and framing the two patches of said element, the two so-called patches being coupled electromagnetically through the aperture of said frame whose body comprises a rear face of small cross section disposed on the side of the lower patch and a front face of larger cross section disposed on the side of the upper patch, so as to widen the angular scan field of a beam in a plane orthogonal to the antenna plane.

Abstract: A mobile wireless terminal includes a housing, a cover removably attached to the housing, and an antenna device disposed inside the housing. The antenna device includes a first antenna element that is disposed inside the housing and serves as a feed element, a plate that provides a ground plane for the first antenna element, and a second antenna element that is formed on one surface of the cover so as to face the first antenna element with the cover being attached to the housing and capacitively couple to the first antenna element and that serves as a parasitic element.

Abstract: Coaxial corporate feed technology is disclosed supporting various compact transmit or receive antenna structures to create stable high gain antenna beams over decade wide bandwidths. At its heart are axially symmetric splitters and folded coaxial arms creating a true time delay network and offering the significant advantage that the coaxial structure is closed and does not radiate or interfere with the radiating elements that it feeds. This technology will reduce the number and size of antennas needed and offers significant coverage improvements for mobile platforms and significant cost reductions on fixed platforms.

Abstract: Disclosed is a wireless receiving apparatus, whereby inter-antenna interference can be reduced without inducing an increase of a mounting area due to an increase of the number of antennas, and the number of RFIC input terminals, circuit scale and power consumption can be reduced. In the wireless receiving apparatus (100), when a receiving antenna (110-1) and a down-converter (130) are connected with a multiplexer (120) therebetween, a capacity control unit (190-2) controls the capacity value of the capacity-variable parasitic element (180-2) connected to the receiving antenna (110-2) such that the communication capacity of the receiving antenna (110-1) is maximum.

Abstract: An apparatus for antenna arrangement isolation is described. The apparatus includes a first antenna element (for example, a CMMB TV antenna) having a first radiator component and a second antenna element (for example, a cellular antenna) having a second radiator component. A first portion of the first radiator component is adjacent to a second portion of the second radiator component. The second radiator component is configured with at least one operational frequency range. The first portion of the first radiator corresponds to at least one minimum electric field region of at least one resonant frequency of the first radiator. The at least one resonant frequency of the first radiator overlaps with the at least one operational frequency range. Methods, Apparatus and Computer readable media for providing the antenna arrangement are also described.

Abstract: An antenna device is provided and includes a bottom, two monopole antennas, and a cover assembled with the bottom. A projection plane is defined perpendicular to the bottom. The two monopole antennas substantially symmetrically protrude from the bottom, and a gap is formed between the two monopole antennas. Projections of the two monopole antennas on the projection plane intersect with each other. Each of the two monopole antennas includes a first frequency receiving portion adjacent to the bottom, a second frequency receiving portion, and a connection portion located between the first frequency receiving portion and the second frequency receiving portion. A slot is formed through the connection portion to adjust a received frequency of the first or second frequency receiving portion. An accommodating space is formed between the cover and the bottom to accommodate the two monopole antennas.

Abstract: A radio repeater system is provided that utilizes miniaturized antennas and a meta-material channel isolator. The radio repeater is comprised of: a receive antenna configured to receive a signal at a desired channel frequency; a transmit antenna configured to transmit the signal at the channel frequency; an amplifier electrically connected between the receive antenna and the transmit antenna; and an array of resonating circuits disposed spatially between the receive antenna and the transmit antenna. Each resonating circuit is designed to resonant at the channel frequency and thereby suppress propagation of surface waves between the antennas.

Abstract: An antenna device of an embodiment includes first and second antenna elements arranged along a side of a patterned ground, and a T-shaped passive element. The first antenna element has a first end connected to a first feed point, and an open second end. A part of the first antenna element including the second end is positioned parallel to the side of the ground. The second antenna element has a first end connected to a second feed point, and an open second end. A part of the second antenna element including the second end is positioned parallel to the side of the ground. A passive element has a common portion connected to the ground between the first and second feed points, and has first and second branches positioned to be able to be capacitively coupled to the parts.

Abstract: A communication device including a ground element and an antenna system is provided. The antenna system is adjacent to the ground element. The antenna system includes at least a first antenna, a second antenna, a connection element, and a resistive element. The second antenna is adjacent to the first antenna. The connection element includes a first portion and a second portion, wherein the first portion is coupled to the first antenna, and the second portion is coupled to the second antenna. The resistive element is coupled between the first portion and the second portion of the connection element. The connection element and the resistive element increase the isolation between the first antenna and the second antenna.

Abstract: Antenna devices, antenna systems and methods of their fabrication are disclosed. One such antenna device includes a semiconductor chip and a chip package. The semiconductor chip includes at least one antenna that is integrated into a dielectric layer of the semiconductor chip and is configured to transmit electromagnetic waves. In addition, the chip package includes at least one ground plane, where the semiconductor chip is mounted on the chip package such that the ground plane(s) is disposed at a predetermined distance from the antenna to implement a reflection of at least a portion of the electromagnetic waves.

Abstract: A vertically interleaved in-building distributed antenna system is described. The in-building distributed antenna system includes a multiple-input and multiple-output (MIMO) radio. The MIMO radio includes a first branch connector and a second branch connector. The in-building distributed antenna system further includes a first branch transport medium coupled to the first branch connector and a second branch transport medium coupled to the second branch connector. The in-building distributed antenna system further includes a plurality of antennas. The plurality of antennas includes one or more first branch antennas coupled to the first branch transport medium and one or more second branch antennas coupled to the second branch transport medium. The first branch antennas are vertically interleaved with the second branch antennas in the structure.

Abstract: Antenna arrangement comprising at least two discrete antennas (1, 2) mechanically attached to each other to forma combined base station antenna (6), wherein at least two discrete antennas (1, 2) in said combined base station antenna (6) are located alongside each other, wherein a conducting element (10) is arranged between the alongside each other located discrete antennas (1, 2).

Abstract: A heterogeneous antenna array containing antenna elements of different antenna element sizes interleaved among one another is disclosed. Heterogeneous antenna arrays as disclosed herein can efficiently cover a broad range of frequencies without loss of optimality at higher frequencies. Also disclosed are methods of frequency-domain oriented image reconstruction which are suitable for use with heterogeneous antenna arrays.

Abstract: This disclosure relates to a network node comprising an antenna arrangement with an antenna column. The antenna column comprises a first and second set of subarrays with at least two subarrays each. Each subarray comprises at least one antenna element. The first and second set of subarrays comprise antenna elements having a first polarization and antenna elements having a second polarization, orthogonal to the first polarization, respectively. Each set of subarrays is connected to a corresponding filter device via a corresponding phase altering device. Each filter device is arranged to separate signals at a first frequency band and signals at the second frequency band between respective combined ports and respective filter ports such that first filter ports are arranged for transmission and reception of signals at one frequency band, and second filter ports are arranged for reception of signals at the other frequency band.

Abstract: Antenna subassemblies suitable for use in phased array antennas are disclosed, as are phased array antenna assemblies and aircraft comprising phased array antenna assemblies. In one embodiment, an antenna subarray assembly comprises a thermally conductive foam substrate, a plurality of radiating elements bonded to the foam substrate, and a radome disposed adjacent the radiating elements. The subarray assembly presents a triangular shape when viewed in plan view, and the plurality of radiating elements are arranged in a triangular array on the foam substrate. In some embodiments, a plurality of subarray assemblies may be assembled to form an antenna assembly. In further embodiments an aircraft may be fitted with one or more antenna assemblies. Other embodiments may be described.

Abstract: A diversity antenna apparatus includes a feed line through which radio communication power is transmitted, antennas connected in cascade through the feed line, and a first rectifier device placed in the feed line, wherein a first one of the antennas and a second one of the antennas each include a second rectifier device having an input terminal thereof connected to the feed line, an antenna device connected to an output of the first rectifier device, and a third rectifier device having an input terminal thereof connected to a connection point between the second rectifier device and the antenna device, and having an output terminal thereof grounded, wherein the first rectifier device placed in the feed line connects between the input terminal of the second rectifier device of the first one of the antennas and the input terminal of the second rectifier device of the second one of the antennas.

Abstract: A broadband antenna element includes a circuit board, an antenna carrier connected to the circuit board, and a broadband antenna. The broadband antenna includes a first antenna and a second antenna which are conductive bent strips of metal. The first antenna includes a first feed terminal and a second feed terminal. The second antenna includes a third feed terminal and a coupling ground terminal. The second feed terminal and the coupling ground terminal are mounted on the circuit board keeping a first predetermined distance away from each other. The first feed terminal is mounted on the antenna carrier/circuit board being connected to the second feed terminal, and the third feed terminal is mounted on the antenna carrier being connected to the coupling ground terminal.

Abstract: The various embodiments include multiple antenna system designs for use in smaller sized mobile computing devices where spatial isolation of antennas may not be feasible. The various embodiments include at least an embodiment first antenna having a first arm and a second arm. The first arm and the second arm are positioned proximate to one another in an intersecting perpendicular configuration. The at least first arm and second arm may be formed a plane that is laterally offset from a plane containing a printed circuit board operating as a ground plane. The at least first arm and second arm may also be positioned in a corner of the printed circuit board. Additional embodiments include a second monopole antenna formed in the same plane as the printed circuit board and having a feed contact positioned proximate to a feed and ground contact of the first antenna.

Abstract: A multi input multi output (MIMO) antenna with no phase change is provided. The MIMO antenna having no phase change constituting one antenna structure overall, wherein unit structures at both sides are symmetrical to each other in a meander form with respect to the center; the unit structures having the meander form are connected to a ground plate by using as a medium power feeding units 240 and 250 supplying an electric energy to the respective unit structures; and the unit structures are installed with a three-dimensional structure, being adjacent to the ground plate.

Abstract: A multi-antenna for a multi-input multi-output wireless communication system includes a substrate, a first planar antenna formed on the substrate along a first direction, a second planar antenna formed on the substrate along a second direction, and a vertical antenna including a conductor formed on the substrate and between the first planar antenna and the second planar antenna, and a radiator perpendicular to the substrate and coupled to the conductor.

Abstract: A dual frequency antenna module is disposed on a substrate. The substrate includes a first surface and a second surface. The dual frequency antenna module includes a first antenna, a second antenna, a first connecting portion, and a second connecting portion. The antennas are in symmetry about a central line of the antenna module and disposed on the first surface. Each antenna includes a radiation portion and a feeding portion. The connecting portions are disposed on the first surface and connected to each other in symmetry. A width of each microstrip transmission line of the connecting portions is less than a width of each microstrip transmission line of the antennas.