Abstract: An antenna assembly is formed from at least one antenna and associated conductive connecting means (wires, conductive gel or liquid, etc.) mounted within a deformable membrane that allows the antenna assembly to be installed or fixed within a narrow gap or crevice, wherein the gap or crevice may be subject to harsh environmental conditions. The gap or crevice is preferably a gap or crevice in a closure. The antenna assembly typically has a low profile, and is installed either flush with or within a traffic surface or within ¼″ above the surface. The deformable membrane will yield under force, but return to its original shape once the force is removed. The deformable membrane and antenna assembly will deform to conform to the shape of a gap or crevice into which the antenna assembly is installed.

Abstract: An improved combination antenna for receiving terrestrial, in particular vertically polarized signals, and for receiving in particular circular polarized satellite signals in accordance with the SDARS services, preferably in a 2.

Abstract: A high gain dual port antenna and antenna array provide enhanced isolation between a receiver and a transmitter. The antenna includes a helical element connected to one port and a dipole element positioned within the helical element and connected to a second port. The helical element can have a uniform diameter or varying diameters, while the dipole element is preferably a Z-shape for accommodation within the helical element.

Abstract: An antenna element comprising at least two conductive elements, and a fluid (e.g., gas or vapor) filled bulb or tube positioned between the conductive elements is provided. The fluid is capable of ionization such that when the fluid in the bulb or tube is energized, the conductive elements electrically communicate with one another, and when the fluid is not energized, the conductive elements do not electrically communicate with one another.

Abstract: A multiband antenna applicable as an internal antenna in small mobile terminals especially. The antenna (200) is a PIFA placed inside the housing of a mobile station with at least two operating bands. A first resonance falling into a lower operating band is produced by means of a radiating conductive pattern (B21) in planar element (220). To improve the characteristics of the antenna in the upper operating band the planar element further comprises a slot (232) which goes between the feed point (F) and the short-circuit point (S) of the antenna. The radiator provided by this slot can be considered a quarter-wave slot radiator or a half-wave loop radiator. The PIFA further may have another radiator, which resonates in the upper operation band. By means of said slot the upper operating band of an antenna can be widened or the radiation in the horizontal plane in the upper operating band can be made more effective.

Abstract: A wireless communication system base station uses a dual-polarized antenna array to receive two signal groups having orthogonal polarizations. In a preferred embodiment a first signal group is received using a first sub-array of odd-numbered antenna elements, while a second signal group is received using a second sub-array of even-numbered antenna elements. Dipoles within the odd-numbered elements are selected so that they have a common polarization orthogonal to the dipoles selected in the even-numbered elements. The two signal groups thus have orthogonal polarizations. Base station signal processing hardware performs separate spatial channel estimation for these two groups, and uses the polarization diversity to improve performance in both the uplink and downlink. The use of polarization diversity allows the physical dimensions of the antenna array to be kept to a minimum.

Abstract: A built-in multi-band mobile phone antenna assembly includes apatch antenna, a loop antenna disposed adjacent to the patch antenna, and a parasitic element disposed adjacent to both the patch antenna and the loop antenna and coupled parasitically to the patch antenna.

Abstract: A multi-band antenna (1) for an electronic device comprises an insulative substrate (30), a feeder cable (40) and a conductive element disposed on the substrate including a radiating portion (21), a first connecting portion (22), a second connecting portion (23) and a ground portion (10). The radiating portion includes a plurality of radiating segments (211-218). The first and second connecting portions connect the ground portion with the radiating portion. A part of the radiating portion, the second connecting portion, the ground portion and the feeder cable form a planar loop antenna. The radiating portion, the first connecting portion, the ground portion and the feeder cable form a planar inverted-F antenna.

Abstract: A multiband antenna includes a 5-6 GHz PIFA surrounded on two or three sides by a 2.4 GHz RFPIFA. The PIFA and RFPIFA are tunable by removing fingers from the PIFA and either removing portions of or creating at least one area in the RFPIFA where inductance may be added. The RFPIFA contains an inductive meanderline. An out-of-plane matching stub is provided between the feed and the ground plane to impedance match the antenna. The PIFA/RFPIFA is supported by a plastic mesa tabletop whose legs are mounted directly to the ground plane of a PCB at the corner of the PCB. Electronic components on the PCB can be mounted underneath the multiband antenna.

Abstract: An antenna is compactified whilst being able to operate across at least two different broad frequency bands. An antenna circuit board 7 on which an antenna pattern 7a and a passive element pattern 7b are formed is accommodated inside an antenna case. An antenna element is connected electrically to the upper end of the antenna pattern 7a. An antenna operating in the GSM and DCS frequency bands is constituted by a telephone element provided on the lower portion of the antenna element and the antenna pattern 7a and passive element pattern 7b formed on the antenna circuit board 7. Thereby, a compactified antenna is enabled to operate across two different broad frequency bands.

Abstract: A multifunction printed antenna for wireless and telematic applications. In one embodiment, GPS and satellite radio patch antenna elements are printed on one side of a printed circuit board and AMPS, PCS, GSM and terrestrial radio slot antenna elements are etched in a ground plane on an opposite side of the same printed circuit board. In an alternate embodiment, the GPS and satellite radio patch antenna elements are elements mounted on one printed circuit board and the AMPS, GSM, PCS and terrestrial radio slot antenna elements are etched in a ground plane on another printed circuit board rigidly secured orthogonal to the GPS and satellite printed circuit board.

Abstract: An object of the present invention is a small composite antenna that is capable of operating in a plurality of different frequency bands. A first antenna 2 constituting a GPS circularly polarized loop antenna is formed on a dielectric substrate 10. A second antenna 3 constituting an ETC square patch antenna is formed on substantially the same axis as the first antenna 2. An earth pattern is formed in the underside of the dielectric substrate 10, and a recess in whose bottom face an earth pattern is formed so as to lie opposite the second antenna 3 is provided. An arc-shaped feed pattern 4 is electromagnetically coupled to the first antenna 2 so as to supply electricity thereto, whereby this antenna is made to operate as a right-handed circularly polarized antenna. Electricity is supplied by a coaxial cable to the second antenna 3 to cause same to operate as a right-handed circularly polarized antenna.

Abstract: A mobile communication terminal comprises a first antenna element and a second antenna element. The first antenna element is arranged over the surface of the circuit substrate contained in the terminal cabinet, the surface being located remotest from the ear of the speaker on the phone. The second antenna element is arranged over the remotest surface and adapted to be pulled in the inside of the terminal cabinet or extended from the terminal cabinet, the second antenna element being electromagnetically coupled with one of the ends of the first antenna element in a state of being extended from the terminal cabinet.

Abstract: A dielectric-patch resonator antenna having a resonator formed from a dielectric material mounted on a ground plane with a conductive skirt, and a patch element disposed inbetween. The ground plane and patch are formed from conductive materials. First and second probes are electrically coupled to the resonator for providing first and second signals, respectively, to or receiving from the resonator. The first and second probes are spaced apart from each other. The first and second probes are formed of conductive strips that are electrically connected to the perimeter of the resonator and are substantially orthogonal with respect to the ground plane. A dual band antenna can be constructed by positioning and connecting two dielectric resonator antennas together. Each resonator in the dual band configuration resonates at a particular frequency, thereby providing dual band operation. The resonators can be positioned either side by side or vertically.

Abstract: A dual-antenna system for receiving signals transmitted via satellite and by terrestrial stations within a single broadcasting service. The dual-antenna system comprises a multi-layer printed circuit substrate as a mounting plate and a satellite antenna including a patch antenna array which has four microstrip patch antenna radiating elements provided on a top surface of the first backgrounded dielectric substrate mounted on the top face of a multi-layer printed circuit substrate, a second dielectric superstrate covering the top face of the first backgrounded dielectric substrate with the dielectric constant higher than that of the first dielectric substrate, and a low-profile radome having top and bottom sections that join together for waterproofingly housing the multi-layer printed circuit substrate assembly and antenna elements therein.

Abstract: A combined antenna system used for both vehicles and structures, whereby a satellite antenna is placed concentrically around a conventional mast antenna that can be used for both conventional FM radio and also terrestrial retransmission of the satellite broadcast signals. The combined antenna system, in a vehicle implementation, is configured to use only the one hole created in the vehicle manufacturing process, thereby preventing the necessity of drilling a second hole for the satellite antenna, which alleviates deterioration of the vehicle's body. Additionally, because the combined antenna system can be advantageously placed, a shorter RF cable connecting it to a receiver box can be implemented than otherwise would be the case for a satellite antenna located on a window or roof of a vehicle.

Abstract: A dual polarized integrated antenna comprising: a quadrifilar radiator; a printed circuit board having a ground plane on an upper surface, wherein the quadrifilar radiator is centrally disposed upon the ground plane; a plurality of lower surface micro-strip traces disposed on a lower surface of the printed circuit board; and a monopole array mounted on the printed circuit board and contactingly engaging the plurality of lower surface micro-strip traces.

Abstract: The invention is a multi-band antenna in which two, three or more antennas are contained within a single housing/radome. Two top-loaded monopole antennas are nested together with one of the antennas being positioned between the ground plate and top plate of the other antenna. Inductive shunts for counteracting the capacitance in the two top-loaded monopole antennas can be provided by hollow conductive tubes in order to help the antenna more closely emulate a purely resistive 50 ohm impedance. A third, microstrip antenna may be positioned on top of the top conductive plate of the outer top-loaded monopole antenna. The cable for the microstrip antenna is routed through the ground plate and top plate of at least one of the top-loaded antennas and through the inside of one of the hollow inductive shunts.

Abstract: An assembly of mechanically steerable directional radio antennas, comprising a primary antenna and at least one secondary antenna, arranged such that the or each secondary antenna is capable of being physically steered over a limited azimuthal arc relative to the primary antenna, and is at least partially within the swept volume of the primary antenna. By allowing the swept volumes of the antennas to overlap, a compact assembly can be provided, whilst by limiting the azimuthal movement of the secondary antennas relative to the primary, it can be arranged that the antennas do not foul each other.

Abstract: A diversified planar phased array antenna includes a dielectric plate, at least two antenna units, at least one first micro-strip line and a ground layer. Two antenna units formed on the dielectric are coplanar and are connected perpendicular together by the first micro-strip line to form one with vertical field polarization and one with horizontal polarization. Each antenna unit is composed of two symmetrical meander line antennas and a second micro-strip line connecting the two meander lines. The first micro-strip line is connected to two second micro-strip lines of the two antenna units. Therefore, the planar phased array antenna meets the requirements for spatial diversity, polarization diversity, radiation diversity and frequency diversity, etc.

Abstract: A combination of near omni-directional antennas and internal patch antennas, all built into an access point in accordance with FCC requirements. Typically a printed antenna array is used for the near omni-directional antenna, and the internal patch antenna is a TM10 mode stacked patch antenna. A mechanical detect switch changes antenna types automatically, depending on the rotation state of the antenna system. Alternately, a configuration utility enables a user to select the antenna type for the access point when it is installed in the field. This arrangement gives the UNII access point flexibility to be mounted in various orientations and match the characteristics of the antenna to the installation requirements.

Abstract: Dual-band antennas that are embedded within portable devices such as laptop computers. In one aspect, a dual-band antenna for a portable device (e.g., laptop computer) includes a first element having a resonant frequency in a first frequency band and a second element having a resonant frequency in a second frequency band, wherein the first element is connected to a signal feed, wherein the second element is grounded, and wherein the first and second elements are integrated within a portable device.

Abstract: A first antenna component has a first polarization. A second antenna component has a second polarization. The second polarization is distinct from the first polarization to provide signal isolation between the first antenna component and the second antenna component. The first antenna component and the second antenna component are coupled in close proximity in a single form factor.

Abstract: A disk-shaped two-antenna assembly contains a CP ring-antenna and a linear-monopole-antenna. The bottom surface of a ring-shaped dielectric member holds a ground plane. A circular radiating element is located on a top surface of the ring-shaped dielectric member. A linear radiating element is positioned coincident with a central axis of the two-antenna assembly, and a top end thereof carries a metal disk that extends perpendicular to the central axis of the two-antenna assembly A centrally-located void lies between the ground plane and the metal disk to provide for the housing of electronic components. Metal RF shields are electrically connected to the ground plane and are located at the top portion of this void, intermediate the bottom-located ground plane and the top-located metal disk.

Abstract: A multi-frequency band antenna may include a base and a first antenna array including a plurality of spaced apart monopole antenna elements extending outwardly from the base a first distance for operating at a first frequency. Further, the multi-frequency band antenna may also include a second antenna array including a plurality of spaced apart antenna elements arranged outside the first antenna array and extending outwardly from the base a second distance less than the first distance. The second antenna array may be for operating at a second frequency lower than the first frequency.

Abstract: A double-action antenna structure includes, e.g. a PIFA-type antenna inside the casing of a mobile station, a coupling element and a moveable whip element. The coupling element is a relatively small conductive element between the radiating plane and ground plane of the PIFA, galvanically isolated from the radiating plane and ground plane. When the whip element is retracted, it has no significant coupling to the PIFA parts. When the whip element is extended, its lower end is galvanically connected to the coupling element so that a significant electromagnetic coupling is established between the whip element and the radiating plane of the PIFA. Thus the whip element is fed through the PIFA without being in galvanic contact with it. The coupling element further provides for the matching of the whip element. The internal and external antennas may be designed and optimized relatively independently of each other.

Abstract: A multi-band antenna including a retractable antenna and a meander antenna wherein the meander antenna may take several forms. In all of the embodiments, the meander antenna comprises first and second meander radiating elements. In one form of the invention, the closed ends of the loops of the second meander radiating element protrude into the open ends of the loops of the first meander radiating element. In other forms of the invention, active and/or passive elements are positioned between the first and second meander radiating elements. In some forms of the invention, the active or passive elements include stubs which protrude into the open ends of the loops of the first meander radiating element.

Abstract: An integrated antenna system including a patch antenna to receive GPS location data and a mono-bow antenna to receive mobile communication band signals. The dual antenna system is housed in a single radome and may include a radio frequency diplexer for combining the GPS location data and mobile communication signals into a single coaxial cable.

Abstract: A direction of a power feed patch relative to a rod-shaped antenna is set so that a short axis thereof substantially orthogonally crosses a plane containing an intersection between the short axis and a long axis of the power feed patch of a patch antenna and an axis of the rod-shaped antenna. As a plane of polarization of a linearly polarized electromagnetic wave radiated from the rod-shaped antenna is thereby caused to substantially coincide with a direction of the long axis of the power feed patch and to substantially orthogonally cross a direction of the short axis, even if a powerful wave of a higher frequency than a desired frequency to be received by the patch antenna and difficult to be removed by a band pass filter of a low-noise amplifier circuit is radiated from the rod-shaped antenna, field components of the high frequency electromagnetic wave in the direction of the short axis will become virtually zero.

Abstract: A radio frequency antenna structure includes a base station antenna and an auxiliary antenna mounted within a common antenna assembly. The base station antenna is configured to transmit or receive signals in a first frequency range and to develop a main beam that is substantially wider in azimuth than in elevation, and the auxiliary antenna is configured to transmit or receive signals in a second frequency range at least partially overlapping the first frequency range and to develop an auxiliary beam at least partially overlapping the main beam. Means are included for decoupling the base station and auxiliary antennas to thereby suppress interference between the main and auxiliary beams, and for suppressing interference between the auxiliary antenna and any co-located antennas.

Abstract: An antenna for receiving satellite signals and terrestrial signals comprises a monopole having a first end, which is connected to a feeding point, and a second end, and an unfed dipole which is arranged in spaced relationship with the second end of the monopole and in axial alignment with said monopole. By means of this arrangement a maximum antenna gain lying at an elevation angle of approx. 45° is achieved. An antenna modification device comprises a dipole and a connection element by means of which the dipole can be connected to the end of an existing monopole antenna in such a way that the dipole is unfed and arranged in spaced relationship with the second end of the monopole as well as in axial alignment with the monopole.

Abstract: A combination linearly polarized antenna and quadrifilar helix antenna (30) comprises a flexible substrate (50), a quadrifilar antenna (33) with a feed network (34) etched on a first portion of the flexible substrate, an antenna with linear polarization (35) etched on a second portion of the flexible substrate and a ground plane (36) for both the quadrifilar antenna and the antenna with linear polarization etched on the flexible substrate.

Abstract: An antenna adapted to operate in multiple frequency bands includes a first conductive loop element having a commonly driven electrical connection at both ends. The first conductive element is resonant at a first frequency. An electrical feed point is located at the commonly driven electrical connection of the first conductive element. A second conductive element includes a straight portion and a helical portion. The straight portion being is coupled to the electrical feed point and the helical portion being is located distally from the feed point. The second conductive element being resonant at a second frequency. This commonly driven loop provides for a wider bandwidth and allows for a more compact multi-band antenna.

Abstract: An embodiment of a dual port antenna system includes a balanced 90° hybrid coupler integrated with a crossed-field antenna to provide stable high isolation between the two input ports of the system. Unlike conventional antennas, the crossed-field antenna is made up of two radiating elements separately fed at a phase difference of 90°. This allows all of the power from the two transmitters to be coupled to the antenna via the hybrid coupler. A balanced 90° hybrid coupler provides isolation between the two ports of the system by matching the electrical characteristics of the antenna. The isolation between ports provided by the balanced 90° hybrid coupler is approximately 35-40 db which is sufficient to allow the independent operation of transceivers connected to the input ports. The crossed-field antenna exhibits loose electrical coupling so that the electrical characteristics remain stable and sufficiently high isolation between input ports is maintained.

Abstract: A single receiving aperture used, for example, in an airborne seeker system collects energy for three discrete energy sensors/receivers including a laser spot tracker, an RF (millimeter wave) transmitter/receiver, and an infrared detector. The RF transmitter/receiver is located at the focus of a primary reflector located on a gimbal assembly. A selectively coated dichroic element is located in the path of the millimeter wave energy which reflects infrared energy from the primary reflector to an optical system which re-images the infrared energy on the infrared detector. The outer edge or rim of the primary reflector is deformed so that the incoming laser energy focuses to a location beyond the RF transmitter/receiver. The laser sensor is positioned adjacent the RF transmitter/receiver at this location in a back-to-back orientation. The laser energy is then detected using a secondary reflector and an optical system which directs the laser energy from the secondary reflector to a laser detector.

Abstract: An antenna apparatus for a folder type mobile phone, wherein a first antenna is installed in a main body of the folder type mobile phone, and a second antenna is installed in the folder. The folder type mobile phone installs a main antenna apparatus in the main body, and an antenna apparatus for maximizing the diversity effect in the folder. As a result, it becomes more convenient to carry the folder type mobile phone based on the diversity mode, while securing a broader separation distance between two antennas at the same time.

Abstract: A composite antenna apparatus includes a cylindrical member 4 formed by a flexible insulating film rolled into a cylindrical shape, a plurality of antenna patterns 3 formed in a helix pattern on a peripheral surface of the cylindrical member 4, a circuit board 2 fixed to one axial end of the cylindrical member 4 and having a circuit pattern 10 connected to the antenna patterns 3 by soldering, and a monopole antenna 1 disposed inside the cylindrical member 4 and standing up on one surface of the circuit board 2. The circuit board 2 is provided with a first metallic pattern 8 having a predetermined area and formed on the one surface of the circuit board 2 at a position inside the cylindrical member 4.

Abstract: A printed circuit board antenna is a diversity polarization antenna for connecting with a printed circuit board. The antenna includes a fixed height connector, a horizontally polarized antenna, and a vertically polarized antenna. The phase center of the vertically polarized antenna coincides with the phase center of the horizontally polarized antenna.

Abstract: An integrated K-port antenna where K is an integer equal to 2 or greater and where the antenna is sufficiently small that it can be enclosed by K−1 overlapping spheres each having a diameter of &lgr;/2 where &lgr; is equal to c/f and f represents an operating frequency of the antenna.

Abstract: A mobile satellite communications terminal (2) comprises a portable computer (68), an interface card (8) containing intermediate frequency (IF) conversion circuitry (28, 52), and an antenna assembly (10) including RF conversion circuitry (34, 50) and an antenna (44). The interface card (8) is connected to the antenna assembly (10) by a detachable cable (32), which carries IF signals. This arrangement reduces RF power losses and interference. The antenna (44) is manually steerable towards a geostationary or quasi-geostationary satellite (12). A navigation signal antenna (56) is mounted on the antenna assembly (10) and is steerable independently of the antenna (44) so as to be vertically aligned, which is the optimum position for receiving navigation signals. The antenna assembly (10) includes orientation sensors (70, 75) which allow the difference between the current and the correct orientation of the antenna (44) to be calculated.

Abstract: In an antenna apparatus, a first antenna and a second antenna for receiving radio waves different from each other are mounted to a single case or a single substrate. The first and the second antennas are connected through a common cable to a receiver body. The first antenna is a helical antenna and comprises an insulating cylindrical bobbin, a plurality of wires helically wound around the insulating cylindrical bobbin, and a ring-shaped insulating wire holder for fixing the wires to the insulating cylindrical bobbin. The second antenna is a monopole antenna and can be arranged inside the insulating cylindrical bobbin. The insulating cylindrical bobbin comprises a hollow center member having a center axis coincident with a center axis thereof so that the center axis of the monopole antenna is coincident with that of the helical antenna, and a rib supporting the hollow cylindrical member.

Abstract: Radio communication systems, e.g. cellular telephones, have employed a space diversity antenna system which includes a plurality of antennas. In the space diversity antenna system for use in the cellular telephone, since two antennas are positioned adjoining each other, the space diversity effect cannot be adequately provided. To solve this problem, the polarization diversity antenna system according to this invention incorporates a first antenna, a second antenna, and a conductive board on which the second antenna is fixed at a given position, thus preventing the current flowing in the conductive board from causing the reception characteristic of the second antenna to deteriorate.

Abstract: Realizing a small-sized antenna device whose protruding length from a main apparatus is made minimum when installed and adding radio communication function thereto and has polarization diversity characteristics. A module main body 5 has a circuit board 22 built therein, an antenna device 1, and a connection terminal 23, and adds radio communication function to a main apparatus 2 when inserted to a slot 3 thereof. The antenna device 1 is mounted to the module main body 5 on a second side 5b located on the opposite.side of a first side 5a which has formed thereon the connection terminal 23. The antenna substrate 8 which has at least an inversed F type antenna pattern and a meander type antenna pattern formed on the main surface 8a thereof by printed wiring is supported perpendicular to the insertion direction toward the main apparatus 2.

Abstract: The present invention relates to a source antenna for transmitting/receiving electromagnetic waves comprising means for transmitting electromagnetic waves with longitudinal radiation operating in a first frequency band and means for receiving electromagnetic waves, characterized in that the means for receiving electromagnetic waves consist of a first array of n radiating elements operating in a second frequency band and a second array of n′ radiating elements operating in a third frequency band, the first and second arrays and the longitudinal-radiation means having a substantially common phase centre and the radiating elements of the first and second arrays being arranged around the longitudinal-radiation means.

Abstract: This invention relates to a tapered slot antenna with broadband characteristics whose beamwidth is stable over both the PCS (1850-1990 MHz) and the cellular bands (824-894 MHz). In a first preferred embodiment, a dual band antenna is disclosed which uses a single column elliptically shaped Vivaldi notches as the radiating elements. In a second preferred embodiment, a dual band antenna comprising elliptically shaped Vivaldi notches and sub-reflector positioned between a main reflector and the dipoles is disclosed. This resultant antenna produces a stable, ninety-degree beamwidth with a bandwidth broad enough to cover the PCS and the cellular bands.

Abstract: An above deck unit for an AIS (automatic identification system) is externally installed on a ship. The above deck unit includes a radio circuit and an associated antenna for transmitting and receiving a message, a position detector and an associated antenna, associated controller and power supply, and a container for storing these elements. An inboard transmission path, e.g., a cable, connects the outdoor unit for the AIS and an AIS display serving as an interface means for the crew. A signal to be transmitted through the inboard transmission path is a processed, for example, an amplified signal, rather than an unprocessed output of a VHF antenna. Therefore, problems of signal loss or degradation along the inboard transmission path are unlikely to occur. Because the unit is incorporated within a single container, it can easily be installed and transferred. With this antenna complex, it is also possible to suppress interference between antennas.

Abstract: Terminal ends at one side of first and second elements 2a, 2b whose length is approximately half the wavelength of radiated radio wave are used as first feeding points #1, #2 and terminal ends at the other side of the individual elements are connected to a loop-shaped element 1 whose perimeter is approximately equal to the wavelength at two oppositely located points of four equally dividing points of the loop-shaped element 1. Terminal ends at one side of third and fourth elements 2c, 2d whose length is approximately half the wavelength of the radiated radio wave are used as second feeding points #3, #4 and terminal ends at the other side of the individual elements are connected to the remaining two oppositely located points. Electric power is fed into the first and second feeding points with a phase difference of 90°.

Abstract: A wireless communication system base station uses a dual-polarized antenna array to receive two signal groups having orthogonal polarizations. In a preferred embodiment, a first signal group is received using a first sub-array of odd-numbered antenna elements, while a second signal group is received using a second sub-array of even-numbered antenna elements. Dipoles within the odd-numbered elements are selected so that they have a common polarization orthogonal to the dipoles selected in the even-numbered elements. The two signal groups thus have orthogonal polarizations. Base station signal processing hardware performs separate spatial channel estimation for these two groups, and uses the polarization diversity to improve performance in both the uplink and downlink. The use of polarization diversity allows the physical dimensions of the antenna array to be kept to a minimum.

Abstract: A first antenna component has a first polarization. A second antenna component has a second polarization. The second polarization is distinct from the first polarization to provide signal isolation between the first antenna component and the second antenna component. The first antenna component and the second antenna component are coupled in close proximity in a single form factor.

Abstract: An antenna device includes: a radiator having a meander portion; and a conductor shorter than the radiator which is disposed opposite to the radiator. A coaxial cable is connected to the radiator and conductor. Respective line lengths of the radiator and conductor satisfy a predetermined relation with respect to a wavelength of a signal to be transmitted and received. The antenna device achieves at least one of improved antenna characteristics, downsizing, and improved mechanical strength.