Loop Type Patents (Class 343/866)
  • Patent number: 6943688
    Abstract: An antenna arrangement comprises at least two antenna loops disposed and overlapping in a plane to define a detection region adjacent thereto in which the antenna loops transmit and/or receive electromagnetic signals and through which a wireless article may pass. The antenna arrangement may be coupled to a processor and/or utilization system for performing a desired function.
    Type: Grant
    Filed: February 23, 2004
    Date of Patent: September 13, 2005
    Assignee: Amerasia International Technology, Inc.
    Inventors: Kevin Kwong-Tai Chung, Shuiwang Liu
  • Patent number: 6933892
    Abstract: A metalized circuit suitable for application as a radio frequency antenna is produced by forming an antenna coil pattern on a flexible substrate. The antenna coil pattern is formed using a conductive ink which is patterned on the substrate. The conductive ink is cured and an electrical-short layer is formed across the coils of the conductive ink pattern. An insulating layer is formed over top of the electrical-short layer, a metal layer electroplated on top of the conductive layer, and then the electrical-short layer is removed. The use of the electrical-short layer during the electroplating allows for the voltage at the different points on the conductive ink layer to be relatively similar, so that a uniform electroplate layer is formed on top of the conductive ink layer. This results in a better quality radio frequency antenna at a reduced cost.
    Type: Grant
    Filed: September 11, 2002
    Date of Patent: August 23, 2005
    Assignee: RCD Technology Corp.
    Inventor: Robert R. Oberle
  • Patent number: 6927741
    Abstract: Location determination is performed using a transmitter including an elongated generally planar loop antenna defining an elongation axis. The elongation axis is positioned along at least a portion of a path. A magnetic field is then generated which approximates a dipole field. Certain characteristics of the magnetic field are then determined at a receiving position radially displaced from the antenna elongation axis. Using the determined certain characteristics, at least one orientation parameter is established which characterizes a positional relationship between the receiving position and the antenna on the path. The magnetic field may be transmitted as a monotone single phase signal. The orientation parameter may be a radial offset and/or an angular orientation between the receiving position and the antenna on the path. The antenna of the transmitter may be inserted into a first borehole to transmit the magnetic field to a receiver inserted into a second borehole.
    Type: Grant
    Filed: March 12, 2002
    Date of Patent: August 9, 2005
    Assignee: Merlin Technology, Inc.
    Inventors: Guenter W. Brune, John E. Mercer, Albert W. Chau, Rudolf Zeller
  • Patent number: 6927742
    Abstract: This invention utilizes the design rule with minimum path to design the antenna layout so as to reduce the across-line effect, and it also makes changes in antenna address to design the optimum antenna layout. Furthermore, the single connector is also substituted for a plurality of connectors in the present invention to disperse the connected position of each antenna.
    Type: Grant
    Filed: March 14, 2003
    Date of Patent: August 9, 2005
    Assignee: Aiptek International Inc.
    Inventor: Chih-An Chen
  • Patent number: 6924777
    Abstract: An antenna is disclosed that comprises a flexible printed circuit material having first and second halves that are joined by a fold section. A coil trace is on the first half and a coil trace is on the second half. The antenna further comprises a first jumper between coil traces. The flexible printed circuit material is folded along the fold section so that the first and second halves are disposed back-to-back. An apparatus for reading information from a transponder is also disclosed that comprises a reader having an antenna capable of transmitting and receiving signals from a transponder, with the reader using an antenna according to the present invention. A media storage system is also disclosed that comprises a plurality of transponders, each of which is disposed on a respective one of a plurality of data cartridges and transmits a data signal related to its data cartridge.
    Type: Grant
    Filed: March 17, 2003
    Date of Patent: August 2, 2005
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Kelly J. Reasoner, Lyle D. Frey, Paul Clinton Coffin
  • Patent number: 6922173
    Abstract: A scanner has plasma loop or plasma window antennas for selectively scanning for ID tags along distinct radials of the scanner. Scanner elements are made electromagnetically invisible to adjacent elements by removing power or lowering plasma densities so that the scanner elements do not interfere with its own operation. Activatable ID tags and a shipping container suitable for scanning with electromagnetic energy are also disclosed.
    Type: Grant
    Filed: October 24, 2003
    Date of Patent: July 26, 2005
    Inventor: Theodore R. Anderson
  • Patent number: 6917335
    Abstract: An internal antenna for wireless devices comprising a ground plane and a planar loop antenna. The shorted loop antenna is provided with a gap and operates at a quarter wavelength. The compact single feed dual or multi band internal antenna is realized either through composite assembly of an active outer and inner radiating elements or by a selective combination of an active outer radiating element and a parasitic inner radiating element. The inner radiating element of the proposed invention is completely encompassed within the outer radiating element. The resonant tuning of the internal antenna is accomplished by means of the matching stub and capacitive loading plates with the matching stubs being entirely internal to the outer radiating element.
    Type: Grant
    Filed: July 16, 2003
    Date of Patent: July 12, 2005
    Assignee: Centurion Wireless Technologies, Inc.
    Inventors: Govind R. Kadambi, Ted S. Hebron, Willis R. Hardy, Sripathi Yarasi
  • Patent number: 6911947
    Abstract: The disadvantages associated with the prior art are overcome by a method and apparatus for reducing multipath distortion in a television signal. Specifically, a plurality of antenna elements receive spatially unique replicas of a desired television signal. The spatially unique replicas are coupled to an adaptive combiner, which generates a spatially combined signal to be coupled to a television receiver. The adaptive combiner forms a weighted summation of the spatially unique replicas, which effectively places spatial nulls in the direction of the multipath interference. The weighting information is provided by an adaptive controller that uses intelligence from a multipath processor located within the apparatus. The intelligence may take the form of a figure of merit derived from the combiner output, or from processing preformed on the input signals themselves.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: June 28, 2005
    Assignee: Thomson Licensing S.A.
    Inventors: Thomas Howard Bruce Cranor, Edward Allen Hall
  • Patent number: 6909401
    Abstract: An antenna device for a radio communication device, preferably a portable radio communication device, comprising a first antenna element (20) comprising a first feeding portion (22) connected to a first feeding device (24), a second antenna element (30; 230; 330; 430; 530; 630) comprising second feeding portions (32, 33; 332, 333) connected to a second feeding device (34), wherein said first antenna element (20) has an unbalanced feed, and said second antenna element (30; 230; 330; 430; 530; 630) has an essentially balanced feed.
    Type: Grant
    Filed: July 10, 2001
    Date of Patent: June 21, 2005
    Assignee: AMC Centurion AB
    Inventors: Tomas Rutfors, Christian Braun, Henrik Falken, Lennart HÃ¥kansson, Liu Donghui, Anders Thornell-Pers
  • Patent number: 6894615
    Abstract: The present disclosure includes a system that provides visual and electronic information in a readily identifiable system. For example, the present disclosure is directed to a combination tag, suitable for use as a vehicle identification window sticker. The combination tag includes a retroreflective article having an optical surface and a radio frequency responsive element. The radio frequency-responsive element includes an antenna and an integrated circuit. The radio frequency-responsive element has information storage and transmission capabilities adapted to enable an interrogation system to obtain information from the radio frequency-responsive element. The radio frequency-responsive element is operably coupled to the retroreflective article.
    Type: Grant
    Filed: October 9, 2001
    Date of Patent: May 17, 2005
    Assignee: 3M Innovative Properties Company
    Inventor: Thomas F. Look
  • Patent number: 6885354
    Abstract: A loop antenna is formed on one side of a circuit board and an IC chip is mounted on the same side of the circuit board. An inner end of the loop antenna is connected to an antenna connection terminal of the IC chip. An arm part provided with a first pad part, a second pad part, and a conducting wire for allowing conduction between the fist pad part and the second pad part is collapsibly provided in such a manner that, when the arm part is collapsed, an outer end of the loop antenna contacts the first pad part and an antenna connection terminal of the IC chip contacts the second pad part.
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: April 26, 2005
    Assignee: Seiko Epson Corporation
    Inventor: Yoshiki Takei
  • Patent number: 6879299
    Abstract: The present invention provides an antenna loop and its layout for low-level digital tablets. The antenna loop for low-level digital tablets in the present invention consists of enameled wire; the layout comprises a single antenna loop consisting of enameled wire. Each antenna loop comprises a plurality of close circles. Furthermore, the circles of odd ordinal numbers comprise odd sections, for instance, the third circle comprises three sections; the circles of even ordinal numbers comprise even sections, for instance, the fourth circle comprises four sections; each section comprises induction areas of substantially the same size. Furthermore, the final section is an open section so that through which the second terminal of the enameled wire loop can stretch out and electrically couple with the ground wire.
    Type: Grant
    Filed: October 15, 2003
    Date of Patent: April 12, 2005
    Assignee: UC-Logic Technology Corp.
    Inventors: Tzong Wei Uen, Shun Bin Lin
  • Patent number: 6876334
    Abstract: Disclosed are systems and methods which provide a tapered conductor strip adapted for broadband wireless communication. Embodiments provide a conductor strip which is curved along its face, thereby providing an aperture taper. The conductor strip configured to provide an aperture taper may be placed over a planar ground plane to form a wideband tapered strip antenna element. Embodiments further provide a conductor strip which is curved along an edge or edges thereof, thereby providing an impedance taper. The dimensions of the impedance taper are preferably selected to provide a desired characteristic impedance with respect to an antenna element formed therefrom. Embodiments may further include a shorting pin or shorting plate configuration to generate an additional mode.
    Type: Grant
    Filed: February 28, 2003
    Date of Patent: April 5, 2005
    Assignee: Hong Kong Applied Science and Technology Research Institute Co., Ltd.
    Inventors: Peter Chun Teck Song, Ross David Murch
  • Patent number: 6864841
    Abstract: A multi-band antenna for enabling an electronic device (such as a laptop computer) to operate in two frequency bands comprises an insulative substrate (30), a conductive element disposed on the substrate, and a feeder cable (40). The conductive element and the feeder cable form a planar inverted-F antenna (10, 23, 21, 25, 24, 11) operating in a lower frequency band and a planar loop antenna (10, 23, 22, 24, 11) operating in a higher frequency band.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: March 8, 2005
    Assignee: Hon Hai Precision Ind. Co., Ltd.
    Inventors: Hsin Kuo Dai, Lung-sheng Tai, Hsien-Chu Lin, Chia-Ming Kuo
  • Patent number: 6839035
    Abstract: A magnetically coupled antenna range extender structured to be interposed between an RF antenna and an electronic device. The antenna range extender is positioned between and proximate to one of the RF antenna and the electronic device, for extending the operating range over which information may be communicated and exchanged between the RF antenna and the electronic device.
    Type: Grant
    Filed: October 7, 2003
    Date of Patent: January 4, 2005
    Assignee: A.C.C. Systems
    Inventors: Louis Addonisio, Marc Chomet
  • Publication number: 20040263412
    Abstract: A reactive circuit is disclosed as part of a method and system for generating high density plasma that does not require the use of a dynamic matching network for directly driving a plasma exhibiting a dynamic impedance. The reactive network is designed to provide a small total reactance when the plasma reactance is at a first plasma reactance and presents a reactance that does not exceed a specified limit at a second plasma reactance. The first and second plasma reactance span a substantially fraction of an expected dynamic plasma reactance range. The first and second plasma reactance values may, for example, correspond to a high expected plasma reactance limit and a low expected plasma reactance limit respectively or the first plasma reactance may correspond to an average expected plasma reactance.
    Type: Application
    Filed: June 21, 2004
    Publication date: December 30, 2004
    Inventor: Patrick Pribyl
  • Publication number: 20040257294
    Abstract: The invention concerns an antenna for use as transmission/reception beacon (2), in a radiofrequency identifying en system, having a general upturned U configuration, located in a vertical plane, above the ground transversely to a passage (9), the antenna thus forming an unclosed loop. Said antenna can consist of a single wire (8), with horizontal median portion (8a), and vertical end portions (8b, 8c). The invention is applicable to a system for detecting, over a large width (L), the passage of people, animals or objects bearing electronic tags (7).
    Type: Application
    Filed: July 29, 2004
    Publication date: December 23, 2004
    Inventors: Tony Bernard, Jean-Marc Martin
  • Patent number: 6830193
    Abstract: A non-contact IC card includes an information storage unit for storing information, a communication controller for controlling communication with an external device, and a loop antenna for transmitting and receiving a radio wave to and from the external device. The non-contact IC card further includes a changeover switch for changing a communication distance between the external device and the card, so that the cost and size of the card can be reduced. The non-contact IC card can be used both in a long-distance mode and in a contact mode, which ensures high security.
    Type: Grant
    Filed: November 26, 2002
    Date of Patent: December 14, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Masahiko Tanaka
  • Publication number: 20040233111
    Abstract: Various resonant modes of a multiresonant antenna structure share at least portions of the structure volume. The basic antenna element has a substantially planar structure with a planar conductor and a pair of parallel elongated conductors, each having a first end electrically connected to the planar conductor. Additional elements may be coupled to the basic element in an array. In this way, individual antenna structures share common elements and volumes, thereby increasing the ratio of relative bandwidth to volume.
    Type: Application
    Filed: January 14, 2004
    Publication date: November 25, 2004
    Applicant: Ethertronics, Inc.
    Inventors: Laurent Desclos, Gregory Poilasne, Jeff Shamblin, Sebastian Rowson
  • Publication number: 20040233114
    Abstract: The invention relates to an antenna coupler (1) for testing mobile transmitters and/or receivers, in particular mobile telephones (2). Said coupler has a receiving element (4) and/or a bearing surface (20) for the mobile transmitter and/or receiver and at least one antenna element (5, 25, 35). According to the invention, the antenna element (5, 25, 35) is configured as a loop that is essentially closed in spatial terms.
    Type: Application
    Filed: June 25, 2004
    Publication date: November 25, 2004
    Inventors: Gottfried Holzmann, Martin Roth
  • Patent number: 6822614
    Abstract: A loop antenna system. The loop antenna system for a wireless transmission device having a signal end and a ground end, includes a loop antenna having a toroidal helix wire with a first end coupled to the signal end and a second end coupled to the ground end.
    Type: Grant
    Filed: January 3, 2003
    Date of Patent: November 23, 2004
    Assignee: Darfon Electronics Corp.
    Inventor: Chien-Chih Chiu
  • Patent number: 6816122
    Abstract: In an electromagnetic coupling type four-point feeding loop antenna (10) comprising a tubular body (11), a loop portion (12) having a loop width (W1), four feeders (13) each having a feeder width (W2), and four electromagnetic coupling wires (17) each having a coupling wire width (W3), the loop width, the feeder width, and the coupling wire width are substantially equal to one another. A gap (&dgr;) between the feeder and the electromagnetic coupling wire is laid in a range between 0.2 mm and 0.8 mm, both inclusive, when the electromagnetic coupling type four-point feeding loop antenna has a feeding impedance of a range between 25 &OHgr; and 100 &OHgr;, both inclusive.
    Type: Grant
    Filed: January 28, 2003
    Date of Patent: November 9, 2004
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Junichi Noro, Masaaki Miyata, Isao Fukae, Akira Miyoshi, Toshihiko Inaba, Kenichi Taguchi, Takashi Horikawa, Wataru Sakaguchi
  • Publication number: 20040212542
    Abstract: An antenna arrangement for identifying an identification element in communication with an object located in an enclosure having a “null” signal region. The antenna arrangement includes a primary antenna loop element positioned in operable communication with the enclosure and the identification element positioned within the enclosure. The primary antenna loop element communicates with the identification element and receives a signal from the identification element, thereby tracking the object associated therewith. A feed point mechanism communicates with the antenna loop element and energizes the antenna loop element, transmits signals and/or receives signals.
    Type: Application
    Filed: April 14, 2004
    Publication date: October 28, 2004
    Applicant: Mobile Aspects
    Inventor: Muhammad Rahim
  • Publication number: 20040212545
    Abstract: Antennas of broadband and multi-band operation are presented. A broadband planar antenna includes two inverted-L antennas (ILAs) facing each other across a gap. One of the ILAs is input fed, and the other is electromagnetically coupled. The positioning of the gap affects the bandwidth. A dual-band planar antenna includes two ILAs facing each other across a gap with one of the ILAs being input fed, and the other being coupled. This dual-band planar antenna also includes a monopole antenna disposed between the two ILAs. A triple-band planar antenna includes two ILAs facing each other across a gap with one of the ILAs being input fed and the other IPA being coupled. This triple-band antenna also includes a monopole antenna disposed between the two ILAs, and a conductor extending horizontally from the monopole antenna towards, but not reaching the coupled ILA. Another dual-band antenna includes an inner cut loop antenna encompassed by an outer cut loop antenna.
    Type: Application
    Filed: September 25, 2003
    Publication date: October 28, 2004
    Inventors: RongLin Li, Emmanouil M. Tentzeris, Joy Laskar
  • Patent number: 6809700
    Abstract: A housing for a tag assembly comprises an internal chamber defined by sidewalls and a bottom wall; a peripheral flange projecting from the housing; convergent surfaces extending at an upper housing end to an upper surface; and a sensor portal projecting through the housing upper surface in communication with the housing chamber. The housing is positioned within a mold block with the upper housing end resident within a mold block cavity. An upper surface of the peripheral flange and housing sidewall superior to the flange abut sidewall portions of the mold block to isolate the upper housing end with the cavity while carrier strip material is induced into the mold to partially embed the housing therein. An annular apparatus is thus formed comprising an annular carrier strip having a transponder housing at least partially embedded therein in which an upper housing end remains free of the carrier strip.
    Type: Grant
    Filed: December 16, 2002
    Date of Patent: October 26, 2004
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Robert Leon Benedict, Franz Josef Hillenmayer, Joseph Carmine Lettieri, Peter Ross Shepler
  • Patent number: 6788270
    Abstract: Antennas and methods of manufacturing and using antennas suited for use in mobile devices are described. The described antennas include an antenna arm (104) and a conical spring radiating element (108) attached to one end of the arm. The spring radiating element (108) is covered by a protective cap (106) and can be compressed to fit inside the cap (106) for easy storage in a PC card. The antenna arm (104) may be implemented as a layered circuit board. In some embodiments the antenna arm (104) includes a radiating element, e.g., a conductive strip (1304), positioned along an edge of the arm (104) which will remain exposed even when the antenna is inserted into a PC card for storage. In various embodiments the spring radiating element (108) automatically extends when the antenna arm (104) is switched from a storage position to an active position, e.g., by pulling on the antenna arm to cause it to slide or swing out of a housing (102).
    Type: Grant
    Filed: August 13, 2002
    Date of Patent: September 7, 2004
    Assignee: Flarion Technologies, Inc.
    Inventors: Peter Suprunov, Joe Felix
  • Publication number: 20040164923
    Abstract: A low cost moldable transformer or trans-inductor core, referred to in this description as a transductor. Elements of the transductor core are formed of a conductive loaded resin-based material. The conductive loaded resin-based material comprises micron conductor fibers, micron conductor powders, or in combination thereof homogenized within a base resin host wherein the ratio of the weight of the conductor fibers, conductor powders, or combination thereof to the weight of the base resin host can be between about 0.20 and 0.40. The micron conductive fibers or powders, can be of stainless steel, nickel, copper, silver, carbon, graphite, plated particles, plated fibers, or the like. Transductors can be formed using methods such as injection molding, over-molding, thermo-set, protrusion, extrusion, compression, or the like, in combination with a large number of production or wire wrapping techniques to achieve desired electrical characteristics.
    Type: Application
    Filed: February 19, 2004
    Publication date: August 26, 2004
    Applicant: Integral Technologies, Inc.
    Inventor: Thomas Aisenbrey
  • Patent number: 6781551
    Abstract: A handheld transmitter and/or receiver for use in a frequency band B with an electric power less than or equal to 10 mW, wherein the frequency band is 50 MHz≦B≦500 MHz. A transmitter and/or receiver module is operationally connected to a transmitter and/or receiver antenna. A casing is made of two parts linked to be mutually movable. At least one predominant part of the module is built into one of the casing parts. The other of the two casing parts includes the antenna.
    Type: Grant
    Filed: August 6, 2002
    Date of Patent: August 24, 2004
    Assignee: Phonak AG
    Inventor: Louis Gerber
  • Patent number: 6774859
    Abstract: An electromagnetic antenna apparatus exhibits a generally continuous signal response between a first frequency and a second frequency, and further exhibits a deviation from the signal response in a frequency region centered substantially at a selected frequency between the first frequency and the second frequency. The apparatus includes: (a) an antenna transceiving element; (b) a feed structure coupled with the antenna receiving element for communicating transceiving signals with the antenna transceiving element; and (c) a discontinuity structure in the antenna transceiving element coupled with the feed structure. The discontinuity structure is configured for effecting return of selected transceiving signals to the feed structure as return signals. The return signals effect the deviation.
    Type: Grant
    Filed: June 1, 2002
    Date of Patent: August 10, 2004
    Assignee: Time Domain Corporation
    Inventors: Hans G. Schantz, Glenn P. Wolenec
  • Publication number: 20040125016
    Abstract: A finely-tuned, compressed antenna in a cube with one or more frequency bands and with high isolation between bands. The antenna is suitable for use in the front end of small, hand-held communications devices. The antenna includes one or more radiation elements, each element for operating in one or more of the bands. A radiation element is formed of a plurality of sections formed of electrically conducting segments where the segments are electrically connected to exchange energy in one or more of the bands of the radiation frequencies. One or more of the radiation elements has segments arrayed in a compressed pattern where the compressed pattern extends in three dimensions to fill a cube.
    Type: Application
    Filed: December 27, 2002
    Publication date: July 1, 2004
    Inventors: Michael Brian Atwood, Robert Paul Garcia, Suresh Kumar Ramasamy, Eduardo Comacho Lopez
  • Publication number: 20040125018
    Abstract: A compressed antenna in a volume suitable for use in the front ends of small communications devices. The compressed antenna operates for exchanging energy in one or more bands of radiation frequencies. The antenna includes one or more radiation elements formed of segments electrically connected so as to exchange energy in one or more of the bands of the radiation frequencies. The radiation element has segments three-dimensionally arrayed and compressed in a volume.
    Type: Application
    Filed: December 27, 2002
    Publication date: July 1, 2004
    Inventors: Suresh Kumar Ramasamy, Eduardo Camacho Lopez, Robert Paul Garcia, Anhtho Hoang Pham
  • Publication number: 20040125017
    Abstract: A compressed antenna in a volume, with one or more of the compressed antennas suitable for use in the front ends of small communications devices. The compressed antennas operate for exchanging energy in one or more bands of radiation frequencies. The antennas include one or more radiation elements formed of conducting electrically connected so as to exchange energy in one or more of the bands of the radiation frequencies. One or more of the radiation elements has segments three-dimensionally arrayed and compressed in a volume.
    Type: Application
    Filed: December 27, 2002
    Publication date: July 1, 2004
    Inventors: Robert Paul Garcia, Shu Li Wang, Suresh Kumar Ramasamy, Eduardo Camacho Lopez
  • Patent number: 6753820
    Abstract: A communication station for contactless communication with suitably formed data carriers has an antenna configuration which has at least one antenna with at least one pole and at least one antenna with at least one essentially closed loop, and where the antenna with at least one pole is loosely electromagnetically coupled with the antenna with at least one essentially closed loop.
    Type: Grant
    Filed: July 19, 2002
    Date of Patent: June 22, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Helmut Koeberl, Peter Raggam
  • Publication number: 20040074974
    Abstract: A first object of the present invention resides in providing a novel installation structure for an RFID tag, which effectively protects the RFID tag from external stress or impact during the storage, transportation and usage, and allows communication with the external.
    Type: Application
    Filed: February 24, 2003
    Publication date: April 22, 2004
    Inventors: Fujio Senba, Nakamaro Hyodo, Jun Fujii, Tomoki Uchiyama, Shigeru Kida
  • Patent number: 6721611
    Abstract: An antenna system for a radio frequency (“RF”) wireless keyboard includes a metallic plate as a part of the antenna system. The metallic plate is located within the wireless keyboard. A RF transmitter is coupled to the metallic plate and an antenna wire which form an the antenna loop. The antenna loop may also be directly integrated into the metallic plate by creating a cut-out space in the metallic plate. The antenna system may also include the metallic plate directly coupled with the RF transmitter so that the metallic plate is a whip or dipole antenna. The RF transmitter generates RF signals associated with particular keyswitches of the wireless keyboard. The antenna system transmits the generated RF signals to a RF receiver that resides separately from, and that communicates with, the wireless keyboard.
    Type: Grant
    Filed: January 14, 2003
    Date of Patent: April 13, 2004
    Assignee: Logitech Europe S.A.
    Inventors: Gerhard Schneider, Viron Teodoridis, Sergio Lazzarotto
  • Patent number: 6703935
    Abstract: An antenna arrangement comprises at least two antenna loops disposed in two intersecting planes disposed at an angle to define a detection region in which the antenna loops transmit and/or receive electromagnetic signals and through which an object may pass. Each antenna loop includes a portion disposed in each of the two planes, and the antenna loops overlap at least in part in each of the two planes. The antenna arrangement may be coupled to a processor and/or utilization system for cooperating therewith for performing a desired function.
    Type: Grant
    Filed: September 19, 2002
    Date of Patent: March 9, 2004
    Assignee: Amerasia International Technology, Inc.
    Inventors: Kevin Kwong-Tai Chung, Shuiwang Liu
  • Patent number: 6700546
    Abstract: Electronic key reader includes a protective metal housing member having a front surface with a center and edges. At least one slot extends from at least one of the edges to the center of the front surface.
    Type: Grant
    Filed: May 24, 2002
    Date of Patent: March 2, 2004
    Assignee: Construction Diffusion Vente Internationale- Societe Anonyme
    Inventors: David Benhammou, Gérard Bonnefoy
  • Patent number: 6696954
    Abstract: An antenna array comprises a plurality of antenna loops disposed to define a portal or passageway or other detection region in which the plural antenna loops transmit and/or receive electromagnetic signals. A processor coupled to the plural antenna loops processes at least the received signals and/or transmitted signals. The plural antennas may be arrayed in a rectangular array, on hanging flexible substrates or other suitable arrangement, and may be coupled to the processor by a filter or selective switch. The processor may be coupled to a utilization system for cooperating therewith for performing a desired function.
    Type: Grant
    Filed: May 14, 2001
    Date of Patent: February 24, 2004
    Assignee: Amerasia International Technology, Inc.
    Inventor: Kevin Kwong-Tai Chung
  • Patent number: 6693599
    Abstract: An RF transponder having an antenna comprising at least two ports operable to receive signals such that, in use, the signals in combination establish at least two current nulls on the antenna, each of the ports being located substantially at a current null.
    Type: Grant
    Filed: February 13, 2002
    Date of Patent: February 17, 2004
    Assignee: National University of Singapore
    Inventors: Michael Yan Wah Chia, Chip Hong Ang, Daryl Lee Song Cher, We Peng Jason Ng
  • Patent number: 6693598
    Abstract: An omni-directional antenna assembly is provided for wireless communication devices requiring multiple polarization characteristics. A loop antenna assembly for a communications device operating at a predetermined wavelength and having a transceiver circuit including a signal output and a ground plane, the antenna assembly including a conductive loop element and a conductive leg member coupled to the loop element proximate a loop perimeter, the leg member for supporting the loop element at a distance away from the ground plane of the communications device, the leg member also defining a ground point and a feed point for operatively coupling the loop element to the ground plane and the signal output, respectively, of the transceiver circuit.
    Type: Grant
    Filed: September 27, 2000
    Date of Patent: February 17, 2004
    Assignee: Tyco Electronics Logistics AG
    Inventors: Bruce Bishop, Matthew H. Commens, Patrick McKivergan, Kevin Ketelsen, Ben Newman, Michael A. Kauffman, Jerry Hovey
  • Publication number: 20040027293
    Abstract: The whole antenna conductor is housed in the interior of a vacuum container of a plasma generator thereby to eliminate the need for an insulating partition or a top plate so that the whole induction field radiated from the antenna can be effectively utilized. Furthermore, the occurrence of abnormal discharge is suppressed to stabilize a high-density plasma by reducing the inductance of the antenna and covering the antenna conductor with an insulator.
    Type: Application
    Filed: June 25, 2003
    Publication date: February 12, 2004
    Inventors: Shoji Miyake, Tatsuo Shoji, Yuichi Setsuhara
  • Publication number: 20040027296
    Abstract: A handheld transmitter and/or receiver for use in a frequency band B with an electric power less than or equal to 10 mW, wherein the frequency band is 50 MHz≦B≦500 MHz. A transmitter and/or receiver module is operationally connected to a transmitter and/or receiver antenna. A casing is made of two parts linked to be mutually movable. At least one predominant part of the module is built into one of the casing parts. The other of the two casing parts includes the antenna.
    Type: Application
    Filed: August 6, 2002
    Publication date: February 12, 2004
    Inventor: Louis Gerber
  • Patent number: 6680708
    Abstract: In order to enable one radiant electrode to transmit and receive signals with a plurality of frequency bands, in a base member, a feeding electrode to be connected to a signal supply source and an open electrode floated from the ground are arranged adjacent to each other leaving a space. In the base member, one end of a linear electrode is connected to the feeding electrode while the other end is connected to the open electrode. A substantially loop-shaped radiant electrode extending from the feeding electrode toward the open electrode via the linear electrode is defined by the feeding electrode, the open electrode, and the linear electrode. The linear electrode is provided with a short-cut electrode short-cutting a loop of the radiant electrode.
    Type: Grant
    Filed: October 12, 2002
    Date of Patent: January 20, 2004
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Kazuhisa Yamaki
  • Publication number: 20040008144
    Abstract: A power feeding point and a grounded point are located in the vicinity of a peripheral portion of a glass sheet for a window; the primary antenna conductor extends in a counterclockwise direction, beginning at the power feeding point, so that the glass sheet has a substantial center located inside the primary antenna conductor; two portions of the primary antenna conductor are connected by a loop-forming conductor to form a loop conductor by the primary antenna conductor and the loop-forming conductor; and the grounding conductor is located near to and capacitively coupled with the primary antenna conductor and the loop-forming conductor.
    Type: Application
    Filed: July 3, 2003
    Publication date: January 15, 2004
    Applicant: Asahi Glass Company, Limited
    Inventor: Masato Kubota
  • Publication number: 20040004577
    Abstract: A flexible curtain antenna comprised of one or more panels containing at least one conductor antenna. The conductors in the panels are coupled to a transmission device, such as an interrogation reader, to form an antenna. The panels are attached to a mounting structure. The curtain antenna is designed so that objects can pass through the panels. As objects containing wireless communication devices pass through the panels, the panels come into close proximity to the wireless communication devices on the objects. The interrogation reader uses the panels as antennas to establish communication with the wireless communication devices on the objects to retrieve information about the objects. This information can be further communicated to a reporting system and/or a remote system using either a wired or wireless connection.
    Type: Application
    Filed: April 24, 2003
    Publication date: January 8, 2004
    Inventor: Ian J. Forster
  • Publication number: 20040001029
    Abstract: The invention concerns an efficient loop antenna of reduced size. The antenna is formed on a dielectric substrate disposed on a conductive ground plane. The substrate has a plurality of regions of differing substrate characteristics. An elongated conductive antenna element is arranged in the form of a loop and disposed on a first region of the substrate. The antenna element can have first and second adjacent end portions separated by a gap. The first region of the substrate has a relative permeability that is higher as compared to a second region of the substrate on which the remainder of the circuitry is disposed. According to one aspect of the invention, the relative permeability of the first region is greater than 1.
    Type: Application
    Filed: June 27, 2002
    Publication date: January 1, 2004
    Inventors: Francis Parsche, William D. Killen, Randy T. Pike
  • Patent number: 6667725
    Abstract: The present invention discloses and teaches apparatus for combining Radio Frequency (RF) technology with novel micro-inductor antennas and signal processing circuits for RF telemetry of real time, measured data, from microelectromechanical system (MEMS) sensors, through electromagnetic coupling with a remote powering/receiving device. Such technology has many applications, but is especially useful in the biomedical area.
    Type: Grant
    Filed: August 20, 2002
    Date of Patent: December 23, 2003
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Rainee N. Simons, Felix A. Miranda
  • Patent number: 6664936
    Abstract: A loop antenna device has a first antenna generating a first magnetic field and a second antenna generating a second magnetic field such that the first magnetic field and the second magnetic field each have a different axis. A series resonant circuit and a parallel resonant circuit are provided for the first antenna and the second antenna, respectively. The series resonant circuit has at least a second coil, a link coil wound around a ferrite core, and a capacitor in series. The parallel resonant circuit has a first coil and a capacitor. When one of the first and second antennas are disposed in the vicinity of a conductor, an electromagnetic wave absorbing member is disposed between a conductor and one of the first and second antennas.
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: December 16, 2003
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Kiyokazu Ieda, Yuichi Murakami, Satoshi Muramoto, Eiji Mushiake
  • Publication number: 20030227421
    Abstract: The radio card of the present invention is such that corresponding unit radio cards do not have their antennas matched in configuration position to each other even if these unit radio cards are placed one over the other by inverting one relative to the other in a right/left inversion relation and in a top/down inversion relation or turning one through an angle of 180° relative to the other.
    Type: Application
    Filed: September 9, 2002
    Publication date: December 11, 2003
    Inventor: Hiroo Shimizu
  • Patent number: 6653982
    Abstract: An antenna for mobile satellite communication disposed on a substantially horizontally oriented conductive base surface having substantially linear conductor parts and an antenna connection point. The conductor parts have a substantially vertical extension portion, substantially horizontal extension portion which, together with the conductive base surface, form a high frequency conducting ring structure. The conductor parts are disposed in a plane, mounted perpendicular to the conductive base surface, and one of the vertical or horizontal extension portions is interrupted to form the antenna connection point. In a further interruption of one of the conductor parts, is provided at least one impedance connection point wired to an impedance.
    Type: Grant
    Filed: February 22, 2002
    Date of Patent: November 25, 2003
    Assignee: FUBA Automotive GmbH & Co. KG
    Inventors: Heinz Lindenmeier, Leopold Reiter, Jochen Hopf