Plural Separate Diverse Type Patents (Class 343/725)
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Publication number: 20030001784Abstract: A ABSTRACT electronic device having multiple antennas and capable of operating in a wireless communication system, where interference between the multiple antennas is minimized using a detuning circuit activated by one or more antennas and resulting in detuning of at least one of the antennas. Activation of the detuning circuit can be accomplished by positioning an antenna to complete the detuning circuit and thereby activate the detuning circuit.Type: ApplicationFiled: June 29, 2001Publication date: January 2, 2003Inventors: Kevin Li, Zhan Li, Francis Daniel McGaffigan, Faton Tefiku
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Patent number: 6496150Abstract: An electronic device having multiple antennas and capable of operating in a wireless communication system, where interference between the multiple antennas is minimized using a detuning circuit activated by one or more antennas and resulting in detuning of at least one of the antennas. Activation of the detuning circuit can be accomplished by positioning an antenna to complete the detuning circuit and thereby activate the detuning circuit.Type: GrantFiled: June 29, 2001Date of Patent: December 17, 2002Assignee: Nokia CorporationInventors: Kevin Li, Zhan Li, Francis Daniel McGaffigan, Faton Tefiku
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Publication number: 20020186171Abstract: A combination linearly polarized antenna and quadrifilar helix antenna (40) includes a quadrifilar antenna (49) having a first coaxial cable (46) and an antenna with linear polarization (44) external to the quadrifilar antenna and having a second coaxial cable (42). A center conductor of the second coaxial cable is isolated from a center conductor of the first coaxial cable and the first coaxial cable runs substantially concentrically through the antenna with linear polarization.Type: ApplicationFiled: June 6, 2001Publication date: December 12, 2002Inventor: Argy Petros
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Patent number: 6492960Abstract: An antenna is described for use with a wireless communications device wherein the antenna comprises a helical radiator having a connector at one end thereof with the helical radiator and connector being of one-piece, unitary construction. In one embodiment, the radiator and connector are formed through a plastic injection molding procedure while in another embodiment, the radiator and connector are formed by use of a metal die-casting procedure. Modified forms of the antenna are also disclosed.Type: GrantFiled: September 28, 2001Date of Patent: December 10, 2002Assignee: Centurion Wireless Technologies, Inc.Inventor: Jonathan L. Sullivan
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Publication number: 20020180649Abstract: A small antenna, which is used in a mobile radio communication apparatus such as a portable telephone, operating in a broader frequency band a conventional antenna, operating corresponding to plural frequencies, and being disposed in a case is provided The radio communication apparatus including the antenna is also provided. The antenna includes a first conductive radiator having a planer shape, a second conductive radiator having a helical shape, and a planar feeding section that is disposed between the first conductive radiator and the ground plane, is isolated from them, and supplying power by electromagnetic coupling.Type: ApplicationFiled: June 28, 2002Publication date: December 5, 2002Inventors: Akihiko Iguchi, Susumu Fukushima, Yuki Satoh
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Patent number: 6486835Abstract: Disclosed is a method and apparatus for use in a wireless terminal for detecting a position of a retractable antenna relative to a fixed antenna. The method has steps of positioning an electrical contact for being electrically coupled to the retractable antenna only when the retractable antenna is retracted within a body of the wireless terminal, and at least partially contained within the fixed antenna; detecting a presence of RF energy that is coupled into the retractable antenna from the fixed antenna, wherein the detected presence of the RF energy is indicative of the retractable antenna being in the retracted position; and, if the retractable antenna is not indicated to be in the retracted position, transmitting RF energy from the retractable antenna using more RF power than if the retractable antenna were indicated to be in the retracted position.Type: GrantFiled: January 31, 2001Date of Patent: November 26, 2002Assignee: Nokia Mobile Phones, Ltd.Inventor: Chris Wakeham
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Patent number: 6483471Abstract: A combination linearly polarized antenna and quadrifilar helix antenna (40) includes a quadrifilar antenna (49) having a first coaxial cable (46) and an antenna with linear polarization (44) external to the quadrifilar antenna and having a second coaxial cable (42). A center conductor of the second coaxial cable is isolated from a center conductor of the first coaxial cable and the first coaxial cable runs substantially concentrically through the antenna with linear polarization.Type: GrantFiled: June 6, 2001Date of Patent: November 19, 2002Assignee: XM Satellite Radio, Inc.Inventor: Argy Petros
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Patent number: 6476768Abstract: Disclosed is a wireless transmitting and receiving antenna which comprises a bobbin made of insulation material and having a first penetration cavity in the center of the bobbin in a lengthwise direction; a first antenna comprising a helical conductor spirally wound on the bobbin and having a resonance frequency, and a matching bar inserted into the cavity of the bobbin, made of a conductor and providing a second penetration cavity in the direction identical with that of the first penetration cavity; a feeder positioned at one part of the bobbin so as to supply signals to the helical conductor; and a second antenna comprising: a rod inserted into the penetration cavities of the bobbin and the matching bar, moving between the penetration cavities in a slipping manner, and wrapped with the insulation material; a conduction material combined to the outer part of the rod, and electrically connecting the feeder and the helical conductor when the rod is inserted into the penetration cavities; and a stopper which isType: GrantFiled: December 28, 2000Date of Patent: November 5, 2002Assignee: MRW Technologies Ltd.Inventors: Min-Jae Woo, Hyo-Jong Lee, Jae-Ho Lee, Choong-Ki Cho, Kyoung-Jin Lee
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Patent number: 6469680Abstract: An antenna arrangement for use in a cellular mobile radio system, consisting of four receiving antenna arrays grouped into two branches (2, 4). The first branch consists of an antenna array (6) receiving vertically polarized signals, located adjacent an antenna array (8) receiving horizontally polarized signals. The second branch (4) consists of a similar arrangement (10, 12) spaced from the first branch to provide space diversity of the received signals. When a signal is received, the outputs from all four antenna arrays (6, 9, 10, 12) are fed to a combiner arrangement (14, 16, 18) to produce a space-diversity and polarization-diversity gain.Type: GrantFiled: October 10, 2000Date of Patent: October 22, 2002Assignee: Orange Personal Communications Services LimitedInventor: John Kelliher
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Publication number: 20020149527Abstract: A multiple-element antenna is provided that includes a monopole portion and a dipole portion. The monopole portion has a top section, a middle section, and a bottom section. The middle section defines a recess between the top and bottom sections, and the bottom section includes a monopole feeding port configured to couple the monopole portion of the multiple-element antenna to communications circuitry in a mobile communication device. The dipole portion has at least one dipole feeding port configured to couple the dipole portion of the multiple-element antenna to communications circuitry in the mobile communications device. The dipole portion of the multiple-element antenna is positioned within the recess defined by the monopole portion of the multiple-element antenna in order to electromagnetically couple the monopole portion with the dipole portion.Type: ApplicationFiled: April 9, 2002Publication date: October 17, 2002Inventors: Geyi Wen, Yihong Qi, Krystyna Bandurska, Perry Jarmuszewski
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Patent number: 6466173Abstract: An antenna assembly, and an associated method, for a portable radio device, such as a mobile station. The antenna assembly includes a whip antenna transducer capable of translation between a retracted position and an extracted position. When positioned in the extracted position, a switch element interconnects the whip antenna transducer together with radio circuitry of the radio device. When positioned in a retracted position, the switch element, instead, connects the radio circuitry of the radio device to a non-movable antenna transducer, such as a patch or PIFA antenna transducer, housed within the housing of the radio device.Type: GrantFiled: September 1, 2000Date of Patent: October 15, 2002Assignee: Nokia CorporationInventor: Kevin Li
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Publication number: 20020140615Abstract: Antennae in which the corresponding radiative element contains at least one multilevel structure formed by a set of similar geometric elements (polygons or polyhedrons) electromagnetically coupled and grouped such that in the structure of the antenna can be identified each of the basic component elements. The design is such that it provides two important advantages: the antenna may operate simultaneously in several frequencies, and/or its size can be substantially reduced. Thus, a mult-band radioelectric behavior is achieved, that is, a similar behavior for different frequency bands.Type: ApplicationFiled: March 18, 2002Publication date: October 3, 2002Inventors: Puente Baliarda Carles, Romeu Robert Jordi, Borj Borau Carmen, Anguera Pros Jaume, Soler Jordj Castany
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Patent number: 6452558Abstract: A microstrip antenna (MSA) above a ground plane, having a size corresponding to an operation frequency, at a junction point thereof, electrically connected to one end of a monopole antenna having a size corresponding to the operation frequency to operate as a complex antenna. A distance between the feed point of MSA and the junction point determines the input impedance for matching. A microstrip line or an (planer) inverted-F antenna may provide the MSA. The monopole element may be a monopole antenna or helical antenna. A portable wireless communication apparatus includes the antenna apparatus having a housing. The monopole antenna is connected to the MSA when the monopole antenna is extended from the housing. A switch may be provided between the monopole antenna and the MSA for diversity operation. The antenna apparatus may be formed on a Printed circuit board and folded.Type: GrantFiled: January 25, 2001Date of Patent: September 17, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yutaka Saitou, Tomoaki Nishikido, Hiroshi Haruki
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Patent number: 6452556Abstract: Disclosed are a built-in dual band antenna device and an operating method thereof in a mobile terminal. In the built-in antenna dual band antenna device, a built-in dual band antenna has a first conductive antenna pattern formed on a board extended from the upper side of a main PCB and a second conductive antenna pattern on a board extended at a right angle from the upper side of the main PCB. A whip antenna is connected to the built-in dual band antenna, and contained in the mobile terminal when the whip antenna is retracted. A whip antenna driver extends or retracts the whip antenna. A duplexer separates an RF signal received from the built-in dual band antenna from an RF signal to be transmitted to the built-in dual band antenna. A controller processes the RF signals received at and transmitted from the duplexer and controls the whip antenna driver to extend the whip antenna in a speech state or upon a call attempt from a user.Type: GrantFiled: September 20, 2001Date of Patent: September 17, 2002Assignee: Samsung Electronics, Co., Ltd.Inventors: Dong-In Ha, Wan-Jin Choi, Dong-Hwan Kim, Jun-Kyu Kang
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Publication number: 20020126057Abstract: The invention relates to a wireless communication device that is capable of communicating using a pole antenna in a first mode and a slot antenna in a second mode. The wireless communication device contains at least one conductive tab that provide an antenna. The tab(s) form a pole antenna, and the tabs may also be attached across a slot to form a slot antenna. The wireless communication device can communicate at different frequencies using the pole antenna in a first mode and the slot antenna in a second mode. The tab(s) may be attached across a slot created in a package to form a slot antenna, or the tab(s) may be attached to a slot that is created as part of the wireless communication device to form a slot antenna. The tab(s) and/or the slot may also contain an adhesive material to attach the wireless communication device to a package, container or other material. More than one slot may be provided to form a circularly polarized antenna.Type: ApplicationFiled: May 14, 2002Publication date: September 12, 2002Inventors: Patrick F. King, Ian J. Forster
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Publication number: 20020126050Abstract: A whip antenna is movable between a first position corresponding to a state in which the whip antenna is extended from a casing of the mobile communication terminal, and a second position corresponding to a state the whip antenna is accommodated within the casing. A built-in antenna is disposed within the casing. A power feeding circuit is disposed within the casing. A first matching circuit has a first impedance, through which the power feeding circuit and the whip antenna are electrically connected when the whip antenna is placed at the first position. A second matching circuit has a second impedance which is higher than the first impedance, through which the whip antenna is grounded when the whip antenna is placed at the second position. A switch mechanism is opened so that the built-in antenna is electrically disconnected from the power feeding circuit when the whip antenna is placed at the first position, and closed so that the built-in antenna is electrically connected to the power feeding circuit.Type: ApplicationFiled: December 28, 2001Publication date: September 12, 2002Applicant: Yokowo Co., Ltd.Inventors: Tadashi Oshiyama, Atsushi Sato, Katsutoshi Okubo, Takao Kawahara, Seiji Gou
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Patent number: 6448934Abstract: An antenna is provided that is adapted to operate in multiple frequency bands. The antenna consists of a first antenna element for receiving and transmitting signals in a first frequency band, and a second antenna element for receiving and transmitting signals in a second frequency band. The first antenna element has a substantially elongated conductor of a predetermined first pitch, which is coupled to a feed point. The second antenna element has a substantially meandering coil of a predetermined second pitch, which is coupled to said feed point. The substantially meandering coil comprises a plurality of first portions having a wound form and surrounding at least partly said first antenna element, and also comprises a plurality of second portions having a straight form. The first portion extends from an upper end of said second portion to a lower end of a subsequent second portion following in axial direction of the second antenna element.Type: GrantFiled: August 28, 2001Date of Patent: September 10, 2002Assignee: Hewlett-Packard CompanyInventors: Man Wei Lee, Huan Fong Tan, Beng Tiek Yap
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Patent number: 6445351Abstract: The invention provides a combined optical sensor and communications antenna system (10). The system includes a primary reflector (12) for reflecting radiation. The primary reflector includes a centrally located core (14), which is adapted to transmit the radiation therethrough. An axis (18) centrally extending through the core forms an optical axis of the system. The system further includes a secondary reflector (16) positioned along the optical axis of the system for rereflecting and focusing the radiation reflected from the primary reflector toward the core of the primary reflector. The system still further includes a beam splitter (20) positioned adjacent the primary reflector on the opposite side from the secondary reflector, for separating and redirecting the radiation rereflected from the secondary reflector into an optical radiation component and a radiofrequency radiation component.Type: GrantFiled: January 28, 2000Date of Patent: September 3, 2002Assignee: The Boeing CompanyInventors: Peter W. Baker, Chris Gulacsik, Marcus R. Gahler, Arthur B. Dahlberg
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Publication number: 20020113741Abstract: A portable device having a base member and a hingedly attached lid member does not require a signal cable to transmit a high-frequency signal between the base unit and the lid. While the lid of the lap-top PC is closed, a radio device installed in the base unit transmits a high-frequency signal from a first antenna to a second antenna, the signal is then output from a signal cable attached third antenna to the atmosphere. The device structured as described above can transmit the high-frequency signal in a non-contact manner between the antenna of the base unit and the antenna of the lid in such a way that there is no need to provide a signal cable between the base unit part and the lid part.Type: ApplicationFiled: December 13, 2001Publication date: August 22, 2002Applicant: International Business Machines CorporationInventors: Takeshi Asano, Kazuo Masuda
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Patent number: 6433749Abstract: An antenna module for a road vehicle comprising a structure including a plurality of antennas having different functions and configured to be mounted on or conform to a surface of the vehicle, a data bus for conveying in a digital format, signals received by or to be transmitted by the antenna between the module and equipment comprised in the vehicle, and means for converting received signals into said format and for converting signals to be transmitted from that format into a form for transmission.Type: GrantFiled: February 26, 2001Date of Patent: August 13, 2002Assignee: Harada Inductries (Europe) LimitedInventor: Alan Thompson
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Patent number: 6429819Abstract: The present invention discloses a combination patch antenna element and bowtie-shaped slot antenna element together disposed upon a first major surface of a dielectric element. The bowtie-slot antenna element is defined upon the dielectric element within a boundary of the patch antenna element. The bowtie-slot antenna element defines a first antenna electrical resonance frequency characteristic, and the patch antenna element defines a second antenna electrical resonance frequency characteristic. The combination patch antenna element and bowtie-shaped slot antenna element are provided in relation to a ground plane element, such as provided by a printed wiring board of a wireless communications device. An additional optional feature of the antenna includes a plurality of conductive pattern enhancement elements disposed on an opposite side of the dielectric element.Type: GrantFiled: April 6, 2001Date of Patent: August 6, 2002Assignee: Tyco Electronics Logistics AGInventors: Bruce Bishop, Ben Newman
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Publication number: 20020101377Abstract: A card-based diversity antenna structure includes a card and at least two antenna elements. The card has active circuitry attached thereto and connectors located at a first end thereof configured for engagement with an interface slot. The at least two antenna elements are attached to the card at a second end thereof and are coupled to the active circuitry. At least two antenna elements are sufficiently spaced apart so as to achieve spatial diversity. The polarizations of two of the at least two antenna elements may be orthogonal to each other so as to achieve polarization diversity. The antenna structure delivers good receive and transmit diversity performance and is well suited to the form factor limits imposed by the dimensions of small cards, such as PCMCIA cards. The configuration is very convenient for application in the 5 to 6 GHz frequency band.Type: ApplicationFiled: December 13, 2000Publication date: August 1, 2002Applicant: Magis Networks, Inc.Inventor: James A. Crawford
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Patent number: 6424309Abstract: A broadband compact antenna comprises an electric dipole or monopole coupled or connected in parallel to a slot antenna. The slot antenna is composed of a flat, square or rectangular conducting sheet with a slot having a variety of possible shapes including a bow-tie or rectangle. The slot is then fed at the center by a coaxial transmission line with its outer conductor bonded to the sheet. To obtain broadband characteristics and compactness, a dipole or monopole, formed using either wire, flat strips or shapes formed in sheets of metal, is located in close proximity to the center of the slot.Type: GrantFiled: June 29, 2000Date of Patent: July 23, 2002Assignee: Telecommunications Research LaboratoriesInventors: Ronald H. Johnston, Tin Chau Choi, Edwin Tung
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Publication number: 20020089459Abstract: An antenna comprising a first resonator element (260) for coupling to an antenna feed (264) ; a second resonator element (262) for coupling to ground; the first and second resonator elements arranged to allow field coupling between the first and second resonator elements such that at a first frequency the first and second resonator elements co-operate to allow operation of the first and second resonator elements in a first mode wherein the direction of current flow in one resonator element is different from the direction of current flow in the other resonator element and at a second frequency the first and second resonator elements co-operate to allow operation of the first and second resonator elements in a second mode wherein the direction of current flow in one resonator element is substantially the same as the direction of current flow in the other resonator element.Type: ApplicationFiled: December 19, 2001Publication date: July 11, 2002Inventor: Alan Johnson
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Publication number: 20020089460Abstract: 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.Type: ApplicationFiled: March 4, 2002Publication date: July 11, 2002Inventors: Ulrich Bettin, Heinz Gerhaeuser
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Patent number: 6417812Abstract: An RJ-45 receptacle connector (3, 6) supports an antenna assembly (2, 7) therein. The antenna assembly comprises a coaxial cable portion (19, 90), an antenna portion (14, 8) electrically connected to the cable portion and a carrier (12, 70) received in the receptacle connector and supporting the antenna portion. The antenna portion is a helical monopole and works in a bandwidth range of 2.357˜2.570 GHz, wherein transmission with a Voltage Standing Wave Ratio (VSWR) in the range of 1˜2 is achieved.Type: GrantFiled: September 25, 2000Date of Patent: July 9, 2002Assignee: Hon Hai Precision Ind. Co., Ltd.Inventor: Szu-Nan Tsai
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Patent number: 6388619Abstract: A flat-plate dual band array antenna is described which comprises two flat plate arrays of single band antenna elements, each of which operates in a different frequency band. The two flat plate arrays are positioned one above the other, with areas in the upper flat plate array being removed in order that the antenna elements in the lower flat plate array can radiate through the upper flat plate array. The geometric arrangement of the antenna elements is such that distribution networks for the antenna elements can be accommodated in the limited space available. Dual band flat-plate array feeds for a reflector antenna are also described. These use at least two flat-plate arrays that are positioned one above the other. Again regions in the upper flat-plate array are removed to allow the lower flat-plate to operate through the upper one.Type: GrantFiled: November 2, 1999Date of Patent: May 14, 2002Assignee: Nortel Networks LimitedInventors: Roger Adrian Perrott, Martin Stevens Smith, Sonya V Amos
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Patent number: 6380903Abstract: Antenna systems for use with wireless communicators, such as radiotelephones, are provided and include a first antenna configured to be internally mounted within a wireless communicator and a retractable, second antenna that couples with the first antenna when extended. The internal, first antenna is resonant within one or more frequency bands and the retractable, second antenna couples with the internal, first antenna so as to enhance one or more of the resonant frequency bands of the internal, first antenna.Type: GrantFiled: February 16, 2001Date of Patent: April 30, 2002Assignee: Telefonaktiebolaget L.M. EricssonInventors: Gerard James Hayes, Robert Sadler
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Publication number: 20020044093Abstract: An antenna system for a portable transceiver device comprises an antenna structure for transmitting and receiving RF signals. The antenna structure includes multiple feeding ports having a common structure fully coupling multiple antennas together. This antenna structure is made of a conductor that can be surface mounted over a nonplanar surface. When the conductor is mounted on a nonplanar surface, the antenna structure extends in three dimensional space around the portable communications device.Type: ApplicationFiled: October 26, 2001Publication date: April 18, 2002Inventors: Geyi Wen, Yihong Qi, Perry Jarmuszewski
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Patent number: 6366247Abstract: The present invention makes it possible to realize an antenna device and a portable radio set capable of greatly reducing the deterioration of antenna characteristics while used near a human body and greatly reducing the deterioration of communication quality by electrically connecting first and second antenna elements to a balanced-to-unbalanced transform circuit by connection means when a first antenna element is retracted, supplying power to the first and second antenna elements from an unbalanced transmission line through balanced-to-unbalanced transform means to operate the first and second antenna elements as antennas, preventing a leakage current from flowing to a ground member to which the unbalanced transmission line is grounded from the first and second antenna elements through the transmission in accordance with the balanced-to-unbalancecd transform by the balanced-to-unbalanced transform means, and thereby preventing the ground member from operating as an antenna.Type: GrantFiled: August 7, 2000Date of Patent: April 2, 2002Assignee: Sony CorporationInventors: Masatoshi Sawamura, Hiroki Ito
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Patent number: 6366258Abstract: An antenna system for use in cellular and other wireless communication includes a dual polarized compact antenna array. In one embodiment, the antenna system includes four T-shaped dipole antenna elements mounted on a ground plane, forming a side of a square shaped array. In another embodiment, the antenna system includes seven T-shaped dipole antenna elements mounted on a ground plane to form two side by side square arrays, wherein the square arrays share a common T-shaped dipole antenna element.Type: GrantFiled: June 25, 2001Date of Patent: April 2, 2002Assignee: Xircom Wireless, Inc.Inventors: John K. Reece, John L. Aden
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Patent number: 6366252Abstract: An antenna subassembly includes a terrestrial and/or satellite auxiliary antenna and a support that mounts the auxiliary antenna to a reflector of a dish antenna. The support can be used to removably affix and position a wide variety of antennas to the dish antenna via magnetic attraction. The support preferably conforms to at least a portion of the dish antenna.Type: GrantFiled: July 24, 2000Date of Patent: April 2, 2002Inventor: Neil D. Terk
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Patent number: 6362793Abstract: An antenna in which first and second antenna elements are selected by a switching apparatus so that the first and the second antenna elements are connected to an unbalanced transmission line via a balancing-unbalancing transmission line or only the first antenna element is connected to the unbalanced transmission line. The unbalanced transmission line supplies power via a balanced-to-unbalanced transformation apparatus to the first and the second antenna elements, so as to operate as an antenna, at which time, balanced-to-unbalanced transformation action of the balanced-to-unbalanced transformation apparatus prevents leakage current from flowing from the first or the second antenna element to the unbalanced transmission line and prevents a ground element on which the unbalanced transmission line is grounded from operating as an antenna.Type: GrantFiled: August 7, 2000Date of Patent: March 26, 2002Assignee: Sony CorporationInventors: Masatoshi Sawamura, Yoshiki Kanayama, Yuichiro Saito
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Patent number: 6362788Abstract: The invention concerns an electromagnetic wave transmitter/receiver device, comprising a body (18), characterised in that it comprises in combination: a receiver plate (16) incorporated in the body (18) including a first array of n radiating elements (301, 302, 303, 304) with a microstrip structure for receiving electromagnetic waves; means for transmitting (19, 20, 22, 23, 24) electromagnetic waves with longitudinal radiation defining a radiation axis for transmitting electromagnetic waves, said means including excitation means (24) for exciting the longitudinal radiation means (19, 20, 22, 23); said radiation means being substantially of constant cross-section in the body (18), perpendicularly intersecting the receiver plate (16) in a circular aperture around which are symmetrically arranged said radiating elements (301, 302, 303, 304), said receiving and transmitting means being arranged such that their respective phase centres are substantially arranged in a so-called focusing zone.Type: GrantFiled: June 23, 2000Date of Patent: March 26, 2002Assignee: Thomson Licensing S.A.Inventor: Ali Louzir
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Patent number: 6362792Abstract: An antenna that functions as an approximately balanced antenna that is structurally asymmetric but electrically symmetric includes a first antenna element that is extendable and retractable, a second fixed antenna element, an unbalanced transmission line feeding the first and second antenna elements, and a balanced-unbalanced convertor. At a time of extending the first antenna element, the first and second antenna elements are supplied an electric power from the unbalanced transmission line through the balanced-unbalanced convertor, so that the first and second antenna elements cooperate to function as an antenna.Type: GrantFiled: August 7, 2000Date of Patent: March 26, 2002Assignee: Sony CorporationInventors: Masatoshi Sawamura, Yoshiki Kanayama, Hiroki Ito
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Publication number: 20020021253Abstract: 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.Type: ApplicationFiled: October 17, 2001Publication date: February 21, 2002Applicant: KOKUSAI ELECTRIC CO., LTD.Inventors: Mitsuru Muramoto, Naoki Onishi, Hirotaka Saito, Kanemi Sasaki
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Publication number: 20020018026Abstract: 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.Type: ApplicationFiled: August 2, 2001Publication date: February 14, 2002Applicant: MITSUMI ELECTRIC CO., LTD.Inventor: Junichi Noro
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Patent number: 6329954Abstract: A combination satellite and terrestrial antenna system for a single-source application. A first embodiment includes a cross dipole for receiving the circularly polarized satellite signals, and a plurality of monopoles for receiving linearly polarized terrestrial signals. The mono-poles are arranged symmetrically about the cross dipole. Alternative embodiments include a helix antenna for receiving the satellite signals, and one or more linear antennas arranged symmetrically with respect to the helix for the terrestrial signals.Type: GrantFiled: April 14, 2000Date of Patent: December 11, 2001Assignee: RecepTec L.L.C.Inventors: Andreas Dirk Fuchs, Ronald Andrew Marino
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Patent number: 6327461Abstract: A retractable antenna for a wireless communicator includes an elongate radiator that slides through a helical radiator. An electrical contact alternately contacts one of the elongate radiator and the helical radiator depending on a position of the elongate radiator relative to the helical radiator. Mechanical disengagement is accomplished by the movement of the elongate radiator into a contact position with the electrical contact to disengage the helical conductor. A preferred feature of the antenna is that one of the helical radiator and elongate radiator make electrical contact with the wireless communicator circuits, even when the antenna is placed between a fully retracted and fully extended position. Multiple band operation is another feature of the retractable antenna due to its periodic nature. Ease of assembly is achieved preferred through individual snap fit components.Type: GrantFiled: May 3, 1999Date of Patent: December 4, 2001Assignee: T & M AntennasInventor: Christopher C. Lang
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Patent number: 6326924Abstract: 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.Type: GrantFiled: May 19, 1999Date of Patent: December 4, 2001Assignee: Kokusai Electric Co., Ltd.Inventors: Mitsuru Muramoto, Naoki Onishi, Hirotaka Saito, Kanemi Sasaki
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Patent number: 6320548Abstract: An antenna that can be used as an active receiving antenna and a transmitting antenna is formed by forming dual disk antenna elements. The dual disk antenna elements are formed by etching a pattern in a layer of conducting material, such as copper, formed on a substrate of dielectric material. One of the disks acts as the active antenna element and the other disk acts as a counterpoise antenna element. In one embodiment a RF amplifier chip is used to form an active receiving antenna. In another embodiment the RF amplifier chip is removed and the antenna can be used either as a receiving antenna or a transmitting antenna. In another embodiment a RF amplifier chip is used with an electronic switch to include the RF amplifier chip when the antenna is used as a receiving antenna and to switch the RF chip out of the circuit when the antenna is used as a transmitting antenna.Type: GrantFiled: January 26, 2001Date of Patent: November 20, 2001Assignee: Integral Technologies, Inc.Inventors: Daniel W. Harrell, Pamela R. Wallace
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Patent number: 6313801Abstract: In an antenna structure including multiple antennas, a first antenna can include a conductive patch and a second antenna can be adjacent the conductive patch. More particularly, the second antenna can define a central axis wherein the central axis is orthogonal with respect to the first antenna and wherein the central axis intersects a central portion of the conductive patch. Alternately or in addition, a first antenna can include a conductive patch with an opening through the conductive patch, and a second antenna can be adjacent the conductive patch wherein a feedline for the second antenna extends through the opening through the conductive patch.Type: GrantFiled: August 25, 2000Date of Patent: November 6, 2001Assignee: Telefonaktiebolaget LM EricssonInventors: Gary George Sanford, Huan-Sheng Hwang
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Patent number: 6313807Abstract: An array antenna includes a patch arrayed on a metal backing plate and a plurality of inputs connected to the patch so as to radiate and receive an electromagnetic wave via the patch. The array antenna includes a transmitting/receiving circuit for feeding or receiving signals at a specific frequency to or from the array antenna. A waveguide divided into sections is provided to feed the electromagnetic wave to the radiating antenna. Each waveguide section produces a specific phase difference along the array antenna which accumulates and causes the electromagnetic wave to focus at a particular angle. Each waveguide section therefore produces a wave focused at a different angle, allowing the antenna to generate a plurality of focused waves.Type: GrantFiled: October 19, 2000Date of Patent: November 6, 2001Assignee: Tyco Electronics CorporationInventor: Frank Stan Kolak
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Patent number: 6310584Abstract: An antenna system for use in cellular and other wireless communication includes a dual polarized compact antenna array. In one embodiment, the antenna system includes four T-shaped dipole antenna elements mounted on a ground plane, forming a side of a square shaped array. In another embodiment, the antenna system includes seven T-shaped dipole antenna elements mounted on a ground plane to form two side by side square arrays, wherein the square arrays share a common T-shaped dipole antenna element.Type: GrantFiled: January 18, 2000Date of Patent: October 30, 2001Assignee: Xircom Wireless, Inc.Inventors: John K. Reece, John L. Aden
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Publication number: 20010030626Abstract: A retractable/extendable antenna for portable radio device is provided, which expands the bandwidth for the operating frequency of 1.5 GHz. This antenna comprises (a) a casing; (b) a first linear antenna element attached retractably or extendably to the casing; the first element being located outside the casing and fed with electric power to be active in the extended state while located inside the casing and fed with no electric power to be inactive in the retracted state; and (c) a second linear antenna element shorter than the first element, which is connected mechanically to one end of the first element and disconnected electrically therefrom; the second element being located outside the casing and fed with no electric power to be inactive in the extended state while located outside the casing and fed with electric power to be active in the retracted state. The first and second elements may be electrically connected to each other.Type: ApplicationFiled: April 13, 2001Publication date: October 18, 2001Applicant: NEC CorporationInventor: Tetsuya Saito
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Publication number: 20010022561Abstract: Antenna elements A1 to A24 of a ring-shaped array antenna are selectively connected to power combiners each with a switch SH1, SH2 and SH3 one after another. When a direct wave and a reflected wave arrive in the directions of the antenna elements A5 and A3, respectively, the antenna elements A2, A5 and A8 in the power combiner SH2 are selected and their received signals are input into a receiver Rr to obtain therefrom an output Sr(2+5+6, f), and the respective antenna elements of the power combiners SH1 and SH3 are sequentially selected and their received signals are input into a receiver Rm to obtain therefrom outputs Sm(1, f), Sm(3, f). The outputs from the receivers Rr and Rm are caused to interfere with each other in an interferer 11 to detect an interference output to obtain data E(K, L).Type: ApplicationFiled: March 30, 2001Publication date: September 20, 2001Inventor: Hitoshi Kitayoshi
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Publication number: 20010020919Abstract: Calibration signals which were generated in a signal generator 107 for calibration and to which frequency conversion was applied in a radio transmitting section 108 for calibration are made to be power levels in power level variable circuits 109-1 to 109-N so that power levels of calibration signals extracted in a signal processing section 106 for calibration become constant, and are multiplied by signals received at antenna elements 102-1 to 102-N in multiplex circuits 103-1 to 103-N.Type: ApplicationFiled: March 5, 2001Publication date: September 13, 2001Inventor: Yasushi Maruta
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Patent number: 6281852Abstract: An antenna that concurrently provides both satellite and local VHF-UHF radio and television reception. The satellite antenna is comprised of plastic or other radio wave transparent material having a radio wave reflective outfacing surface thereon shaped to reflect incoming satellite signals to a defined focal point. Channels formed in the radio wave reflective material define one or more leg elements for omni directional reception of local VHF/UHF signals eliminating the need and cost to install a separate antenna for local television and radio reception.Type: GrantFiled: February 24, 1997Date of Patent: August 28, 2001Inventor: Sal Amarillas
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Patent number: 6271797Abstract: An antenna mount for supporting a whip antenna on a ground vehicle has an upper part and a lower part, the upper part supports the whip antenna and has an upper mounting ring and the lower part extends through an outer shell of the vehicle has a lower mounting ring, one or more intermediate rings are disposed between the upper ring and the lower ring and incorporate a cavity for containing a GPS antenna.Type: GrantFiled: June 18, 1999Date of Patent: August 7, 2001Assignee: R. A. Miller Industries, Inc.Inventor: Paul E. Miller
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Patent number: 6268822Abstract: A tandem dual-frequency sensor for a missile that uses a steerable dichroic primary millimeter wave reflector to reflect millimeter wave energy to a secondary reflector while passing laser light in the infra-red region through a dichroic region of the reflector to multiple staring laser detectors mounted behind the primary reflector.Type: GrantFiled: December 7, 1999Date of Patent: July 31, 2001Assignee: Alenia Marconi Systems Inc.Inventors: Ross J. Sanders, John D. Shmoldas, Dean Arthur Wicks