With Series Reactance In Loop Patents (Class 343/744)
  • Patent number: 10511087
    Abstract: An antenna includes a base, and first and second supports coupled to the base and extending perpendicular therefrom. The first and second supports oppose one another and are spaced apart from one another. The antenna also includes a plurality of plates spaced apart and parallel to one another. Each plate is T-shaped to have a trunk and a top wherein a width of the trunk is less than a width of the top. Each trunk is coupled to one of the first support and second support, and extends perpendicular thereto wherein a corresponding top of the plate is spaced from an opposing one of the first support and second support to thereby generate a gap region that serpentines between the first support and second support and around the top of each of the plates.
    Type: Grant
    Filed: September 27, 2018
    Date of Patent: December 17, 2019
    Inventor: David F Rivera
  • Patent number: 10416268
    Abstract: The present disclosure is directed towards direction finding (DF) systems that can detect and locals a radio frequency (RF) signal (e.g. an emergency beacon) is two dimensions (i.e., azimuth and elevation). In one embodiment, a DF system comprises an array of multipolarized loop antennas coupled to a beamformer which provides monopole, dipole, and loop antenna element modal signals. The DF system may also comprise a multi-channel digital receiver system coupled to the beamformer. The multi-channel digital receiver system is configured to receive modal signals provided thereto from the beamformer which can be used for accurate two-dimensional geolocation of RF signals including, but not limited to, location of RF emergency beacon sources.
    Type: Grant
    Filed: April 13, 2016
    Date of Patent: September 17, 2019
    Inventors: Alan J. Fenn, Beijia Zhang, Peter T. Hurst, Kenneth E. Kolodziej, Larry L. Retherford, Christian D. Austin
  • Patent number: 10396438
    Abstract: The present application provides an antenna system for use in an electronic device. The antenna system includes a conductive substrate. The antenna system further includes a conductive element, which extends along a length between two ends a distance away from the conductive substrate. An area between the conductive substrate and the conductive element form at least part of a loop which is internal to the antenna system. The antenna system still further includes a differential signal source coupled between two points along the length of the conductive element. Each of the two points are proximate a respective one of the two ends of the conductive element. The differential signal source is coupled to each of the two points via a high frequency blocking circuit. Further yet, the antenna system includes an alternative signal source coupled to the conductive element between the two ends of the conductive element toward a center of the conductive element via a low frequency blocking circuit.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: August 27, 2019
    Assignee: Motorola Mobility LLC
    Inventors: Hugh Smith, Mohammed Abdul-Gaffoor
  • Patent number: 10079621
    Abstract: An antenna device is provided. The antenna device includes contact terminals including a first contact terminal and a second contact terminal, sub-coil antennas each including at least one loop, and a switch configured to selectively connect sub-coil antennas to the first contact terminal and the second contact terminal according to a control signal input through the first contact terminal and the second contact terminal.
    Type: Grant
    Filed: January 13, 2016
    Date of Patent: September 18, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Woo-Sup Lee, Jung-Sik Park
  • Patent number: 9577325
    Abstract: A radiating system transmits and receives in first and second frequency regions and includes a radiating structure comprising first and second radiation boosters having maximum sizes smaller than 1/30 times the free-space wavelength of the lowest frequencies of the first and second frequency regions, respectively. The radiating system further includes a radiofrequency system having first and second ports respectively connected to first and second internal ports of the radiating structure, and a third port connected to an external port of the radiating system.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: February 21, 2017
    Assignee: Fractus Antennas, S.L.
    Inventors: Aurora Andujar Linares, Jaume Anguera Pros, Cristina Picher Planellas
  • Patent number: 9437646
    Abstract: A detecting device which detects electromagnetic waves includes an antennal configured to receive electromagnetic waves, and a plurality of semiconductor rectifying devices serially connected to the antenna, and connected in parallel to each other such that the polarity is aligned, so as to receive electromagnetic waves propagated from the antenna, wherein the plurality of semiconductor rectifying devices are each disposed at positions where the phase of electromagnetic waves propagated from the antenna is substantially the same phase.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: September 6, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryota Sekiguchi, Masahiro Okuda
  • Patent number: 9407007
    Abstract: An antenna device in a wireless communication includes antenna wires of four sides which include three feeding points and have a loop structure and four main switches which are located among the antenna wires of the four sides, wherein the antenna device operates as a loop antenna when the antenna wires of the four sides are connected according to operations of the main switches and wherein the antenna device operates as dipole antennas when the antenna wires of the four sides are disconnected according to operations of the main switches.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: August 2, 2016
    Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and Technology
    Inventors: Duck-Dong Hwang, Chul-Soon Park, In-Sang Song, Inn-Yeal Oh, Chae-Jun Lee
  • Patent number: 9300047
    Abstract: An antenna for receiving circularly polarized satellite radio signals has a conductive base surface and at least one a conductor loop oriented horizontally above the base surface by a height h. The conductor loop is configured as a polygonal or circular closed ring line radiator. The ring line radiator forms a resonant structure that is electrically excited so that the current distribution of a running line wave in a single rotation direction occurs on the ring line, wherein the phase difference of which, over one revolution, amounts to essentially 2?. A vertical radiator extends between the conductive base surface and the circumference of the ring line radiator. The height h is smaller than ? of the free-space wavelength ?.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: March 29, 2016
    Assignee: Delphi Deutschland GmbH
    Inventors: Stefan Lindenmeier, Heinz Lindenmeier, Jochen Hopf, Leopold Reiter
  • Patent number: 9287623
    Abstract: An antenna for receiving circularly polarized satellite radio signals has a conductive base surface and at least one a conductor loop oriented horizontally above the base surface by a height h. The conductor loop is configured as a polygonal or circular closed ring line radiator. The ring line radiator forms a resonant structure that is electrically excited so that the current distribution of a running line wave in a single rotation direction occurs on the ring line, wherein the phase difference of which, over one revolution, amounts to essentially 2?. A vertical radiator extends between the conductive base surface and the circumference of the ring line radiator. The height h is smaller than ? of the free-space wavelength ?.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: March 15, 2016
    Assignee: Delphi Deutschland GmbH
    Inventors: Stefan Lindenmeier, Heinz Lindenmeier, Jochen Hopf, Leopold Reiter
  • Patent number: 9208942
    Abstract: A structure for wireless communication having a plurality of conductor layers, an insulator layer separating each of the conductor layers, and at least one connector connecting two of the conductor layers wherein an electrical resistance is reduced when an electrical signal is induced in the resonator at a predetermined frequency.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: December 8, 2015
    Assignee: Nucurrent, Inc.
    Inventors: Vinit Singh, Christine A. Frysz
  • Patent number: 9203143
    Abstract: A magnetic field focusing assembly includes a magnetic field generating device configured to generate a magnetic field, and a split ring resonator assembly configured to be magnetically coupled to the magnetic field generating device and configured to focus the magnetic field produced by the magnetic field generating device.
    Type: Grant
    Filed: November 12, 2012
    Date of Patent: December 1, 2015
    Assignee: DEKA Products Limited Partnership
    Inventor: David Blumberg, Jr.
  • Patent number: 9178278
    Abstract: Electronic devices may be provided with antenna structures such as distributed loop antenna resonating element structures. A distributed loop antenna may be formed on an elongated dielectric carrier and may have a longitudinal axis. The distributed loop antenna may include a loop antenna resonating element formed from a sheet of conductive material that extends around the longitudinal axis. A gap may be formed in the sheet of conductive material. The gap may be located under an opaque masking layer on the underside of a display cover glass associated with a display. The loop antenna resonating element may have a main body portion that includes the gap and may have an extended tail portion that extends between the display and conductive housing structures. The main body portion and extended tail portion may be configured to ensure that undesired waveguide modes are cut off during operation of the loop antenna.
    Type: Grant
    Filed: November 17, 2011
    Date of Patent: November 3, 2015
    Assignee: Apple Inc.
    Inventors: Jiang Zhu, Jerzy Guterman, Mattia Pascolini, Robert W. Schlub, Jayesh Nath, Enrique Ayala Vazquez, Jonathan Haylock, Boon W. Shiu, Ruben Caballero
  • Patent number: 9147936
    Abstract: A low profile antenna using a cavity-backed central radiating surface surrounded by one or more ground plane surfaces. Passively reconfigurable structure provide frequency dependent coupling between the surfaces. The frequency dependent couplings may be implemented using meander line structures, Variable Impedance Transmission Lines (VITLs), or tunable VITLs that used interspersed electroactive sections.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: September 29, 2015
    Assignee: AMI Research & Development, LLC
    Inventors: John T. Apostolos, Judy Feng, William Mouyos, Benjamin McMahon
  • Patent number: 9105965
    Abstract: A near field communications (NFC) device is disclosed that interacts with other NFC devices to exchange information and/or the data. An operator may touch, or be sufficiently proximate to, an antenna module of the NFC device to operate and/or control the NFC device. The antenna module includes antenna components that are characterized by a corresponding characteristic impedance. The touch, or sufficient proximity, of the operator changes the corresponding characteristic impedance of antenna components. The NFC device may determine a location of the touch, or proximity, of the operator based upon this change. The NFC device may interpret the location of the touch, or proximity, of the operator as information from the operator to operate and/or control the NFC device.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: August 11, 2015
    Assignee: Broadcom Corporation
    Inventors: David Grant Cox, Andrew Pienkowski
  • Patent number: 8836603
    Abstract: An antenna device includes: a plurality of loop metal wires that form loops out of metal wires and that are radially arranged around a center line; a power feeding portion that feeds power to the loop metal wires or a power receiving portion that receives power from the loop metal wires and that is provided on the center line; and a variable impedance element that is inserted in each of the loop metal wires.
    Type: Grant
    Filed: April 1, 2010
    Date of Patent: September 16, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masahiro Hanazawa, Nobuhiro Ide
  • Patent number: 8836595
    Abstract: An antenna device that radiates or receives a radio wave includes: a first wire line; a second wire line that is parallel to the first wire line; a power feeding/receiving point that is provided at proximal portions of the first wire line and second wire line; and a terminal resistance that is provided at distal end portions of the first wire line and second wire line.
    Type: Grant
    Filed: April 1, 2010
    Date of Patent: September 16, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masahiro Hanazawa, Nobuhiro Ide
  • Publication number: 20140203979
    Abstract: An antenna for receiving circularly polarized satellite radio signals has a conductive base surface and at least one a conductor loop oriented horizontally above the base surface by a height h. The conductor loop is configured as a polygonal or circular closed ring line radiator. The ring line radiator forms a resonant structure that is electrically excited so that the current distribution of a running line wave in a single rotation direction occurs on the ring line, wherein the phase difference of which, over one revolution, amounts to essentially 2?. A vertical radiator extends between the conductive base surface and the circumference of the ring line radiator. The height h is smaller than ? of the free-space wavelength ?.
    Type: Application
    Filed: March 14, 2013
    Publication date: July 24, 2014
    Applicant: DELPHI DEUTSCHLAND GMBH
    Inventor: Delphi Deutschland GmbH
  • Patent number: 8643557
    Abstract: An antenna apparatus and a radio communication apparatus are capable of separately controlling a resonance frequency in a basic mode and a resonance frequency in a higher mode and have a wide bandwidth in which the resonance frequency in the basic mode is variable. The antenna apparatus includes a feeding electrode 2, a loop-shaped radiation electrode 3, a capacitance portion 4, and inductors 5 and 6. The capacitance portion 4 is formed by a gap between an open end 3a of the loop-shaped radiation electrode 3 and the feeding electrode 2. The inductor 5 is disposed at a position where a large current is obtained in the basic mode and a small current is obtained in the higher mode. The inductor 6 is disposed at a position where a large current is obtained in the higher mode and a small current is obtained in the basic mode.
    Type: Grant
    Filed: February 23, 2010
    Date of Patent: February 4, 2014
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Shinichi Nakano, Kazunari Kawahata, Nobuhito Tsubaki, Kenichi Ishizuka, Shigeyuki Fujieda
  • Patent number: 8599083
    Abstract: An antenna for receiving circularly polarized satellite radio signals has a conductive base surface and at least one a conductor loop oriented horizontally above the base surface by a height h. The conductor loop is configured as a polygonal or circular closed ring line radiator The ring line radiator forms a resonant structure that is electrically excited so that the current distribution of a running line wave in a single rotation direction occurs on the ring line, wherein the phase difference of which, over one revolution, amounts to essentially 2?. A vertical radiator extends between the conductive base surface and the circumference of the ring line radiator. The height h is smaller than ? of the free-space wavelength ?.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: December 3, 2013
    Assignee: Delphi Delco Electronics Europe GmbH
    Inventors: Stefan Lindenmeier, Heinz Lindenmeier, Jochen Hopf, Leopold Reiter
  • Patent number: 8344959
    Abstract: First, second and third feed ports interface to an antenna that has an impedance disposed between its ends which are defined by the first and second feed ports. The third feed port interfaces to the antenna at an intermediate point between the ends. In a first mode (balanced mode) the impedance enables signals to/from the first and second feed ports to resonate along the whole of the antenna, and in a second mode the impedance enables signals to/from the third feed port to resonate along a portion of the antenna, the portion terminating at the impedance. In embodiments, the first mode is for RFID signals and the second mode is for any one or more of Bluetooth/WLAN/GPS/FM signals. The first and second mode may operate simultaneously. Also detailed is a method for making an electronic device having such an antenna.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: January 1, 2013
    Assignee: Nokia Corporation
    Inventors: Marko Tapio Autti, Jouni Vesa Karkinen
  • Patent number: 8212735
    Abstract: Apparatus including: an antenna configured for efficient far field communication at a first frequency; an inductive element including a plurality of series-connected coiled portions, including a first coiled portion and a second coiled portion, wherein the inductive element is configured to provide near field communication at a second frequency; and at least one reactive element parallel connected between the first coiled portion and the second coiled portion, wherein the at least one reactive element has a lower impedance at the first frequency than at the second frequency.
    Type: Grant
    Filed: June 5, 2009
    Date of Patent: July 3, 2012
    Assignee: Nokia Corporation
    Inventors: Lassi Hyvonen, Alexandre Pinto, Jens Troelsen
  • Patent number: 8175546
    Abstract: The present receive antenna interface for an RF (radio frequency) transceiver includes a transmitting and receiving antenna. The receive antenna interface also includes a relay and an electrically-isolated transmit-ground connector that are configured such that the receiving antenna is not capable of being used by the transceiver unless the transmit-ground connector is connected to a ground-on-transmit connector provided by the transceiver. As a result, damage from the accidental transmission of RF signals into the receiving circuitry of the transceiver is prevented.
    Type: Grant
    Filed: September 14, 2009
    Date of Patent: May 8, 2012
    Assignee: PDS Electronics, Inc.
    Inventors: Paul D. Sergi, Charles T. Rauch
  • Patent number: 8164528
    Abstract: The present invention relates to a self-contained counterpoise compound field antenna. Improvements relate particularly, but not exclusively, to compound loop antennas having coplanar electric field radiators and magnetic loops with electric fields orthogonal to magnetic fields that achieve performance benefits in higher bandwidth (lower Q), greater radiation intensity/power/gain, and greater efficiency. Embodiments of the self-contained antenna include a transition formed on the magnetic loop and having a transition width greater than the width of the magnetic loop. The transition substantially isolates a counterpoise formed on the magnetic loop opposite or adjacent the electric field radiator.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: April 24, 2012
    Assignee: DockOn AG
    Inventor: Forrest James Brown
  • Patent number: 8164530
    Abstract: A magnetic and/or magneto-electric antenna that has a plurality of conducting loops where each individual loop can be resonated at a frequency that is offset from the frequency of the other loops to provide a composite band-pass response that is broader than that of the individual loops. A receiving circuit acts to sum the signals from each of the antennas to provide a combined frequency response that is broader in bandwidth than any of the individual loops. Similarly a combination of multiple transmitter loops where a transmit circuit drives a common transmit waveform to each of the combined antennas to provide a combined transmitter frequency response that is broader in bandwidth than any of the individual loops.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: April 24, 2012
    Assignee: WFS Technologies Ltd.
    Inventors: Mark Rhodes, Brendan Hyland
  • Patent number: 8164529
    Abstract: A loop antenna may include first and second electrical conductors arranged to define a circular shape with first and second spaced apart gaps therein. Opposing portions of the first and second electrical conductors at the first gap may define a signal feedpoint, and opposing portions of the first and second electrical conductors at the second gap may define an impedance tuning feature. The second gap may be circumferentially spaced from the first gap less than ninety degrees, and the second gap may be greater than the first gap to provide a predetermined impedance. A coaxial transmission line may form a feed inset into the loop conductor. The loop antenna may be planar and have a reduced size for ease of manufacture and use, and it may provide an isotropic radiating pattern at a predetermined operating frequency, which may avoid the need for antenna aiming.
    Type: Grant
    Filed: October 20, 2008
    Date of Patent: April 24, 2012
    Assignee: Harris Corporation
    Inventors: Francis Eugene Parsche, Dennis Lee Tebbe
  • Patent number: 8130158
    Abstract: An antenna apparatus is disclosed that includes a feeding portion; a looped antenna element connected to the feeding portion; and a resistor inserted into the looped antenna element.
    Type: Grant
    Filed: April 10, 2009
    Date of Patent: March 6, 2012
    Assignee: Fujitsu Component Limited
    Inventors: Shigemi Kurashima, Masahiro Yanagi, Takashi Arita
  • Patent number: 8058998
    Abstract: An RFID antenna comprising an elongated structure existing along an axis that is long compared to the signal wavelength and including twin ribbon-like feed lines of electrically conductive material, the feed lines being in a common plane and being uniformly laterally spaced from one another, and a plurality of radiating perturbations associated with the feed lines at a plurality of locations spaced along the feed lines, at each location each feed line has its own individual perturbation or portion of a perturbation.
    Type: Grant
    Filed: March 2, 2009
    Date of Patent: November 15, 2011
    Assignees: Wistron NeWeb Corporation, Ohio State University Research Foundation
    Inventors: Walter D. Burnside, Robert J. Burkholder, Feng-Chi Eddie Tsai
  • Patent number: 8035568
    Abstract: An electromagnetic reactive edge treatment including an array of capacitively-loaded loops is disposed at or near an edge of a conductive wedge. The axes of the loops are oriented parallel to the edge of the wedge. This edge treatment may enhance or suppress the hard diffraction coefficient, depending on the resonant frequency fo of the array of loaded loops. Diffraction of incident waves that are lower (higher) in frequency than fo may be enhanced (suppressed) due to the increase (decrease) in effective permeability of the volume occupied by the array of loops. Applications include controlling antenna patterns, side lobe levels, and backlobe levels for antennas mounted on conductive surfaces near edges or corners.
    Type: Grant
    Filed: June 18, 2010
    Date of Patent: October 11, 2011
    Assignee: Wemtec, Inc.
    Inventors: Rodolfo E. Diaz, William E. McKinzie, III
  • Publication number: 20110215978
    Abstract: An antenna receiving circularly polarized satellite radio signals has a conductive base surface and a conductor loop oriented horizontally above the base. The loop is configured as a ring line radiator, incorporating a polygonal or circular closed ring line, in a horizontal plane above the conductive base surface. The conductor loop is electromagnetically excited by a device including an antenna connector. The ring line radiator forms a resonance structure that is electromagnetically excited, whereby the current distribution of a running line wave in a single rotation direction occurs on the ring line. At least one vertical radiator extends toward the conductive base surface and is disposed on the ring line radiator, wherein the vertical radiator is electromagnetically coupled both with the ring line radiator and the electrically conductive base surface, to support the vertically oriented component of the electromagnetic field.
    Type: Application
    Filed: September 2, 2010
    Publication date: September 8, 2011
    Applicant: DELPHI DELCO ELECTRONICS EUROPE GMBH
    Inventors: Stefan LINDENMEIER, Heinz LINDENMEIER, Jochen HOPF, Leopold REITER
  • Patent number: 7969373
    Abstract: A planar antenna device (AD) for a TV receiver (R) comprises i) a loop antenna (LA) comprising first (E1) and second (E2) ends spaced one from the other, ii) a tuning means (TM) connected to the first (E1) and second (E2) ends of the loop antenna (LA) and arranged to control the frequency of the VHF TV signals this loop antenna (LA) is able to receive from command signals, iii) a first ground plane (GP1) cooperating with the loop antenna (LA) in order to act as a UHF monopole in receiving TV signals with UHF frequencies, iv) a first coupling means (CM1) coupled to the loop antenna (LA) at a first chosen location and arranged to deliver the received VHF signals, v) a second coupling means (CM2) coupled to the loop antenna (LA) at a second chosen location and arranged to deliver the received UHF signals, vi) an amplification means (AM) coupled to the first ground plane (GP1) and arranged to amplify TV signals, and vii) a switching means (SM) arranged to couple the amplification means (AM) to the first coupling
    Type: Grant
    Filed: October 18, 2006
    Date of Patent: June 28, 2011
    Assignee: NXP B.V.
    Inventors: Efthimios Tsilioukas, Peter Boekestein
  • Publication number: 20110115607
    Abstract: The present invention is concerned with a transmitting/receiving antenna, which includes a dielectric board, a driven loop antenna provided to the dielectric board, transmit processing portion connection terminals connected to the driven loop antenna, a transmitting/receiving loop antenna arranged in close vicinity to the driven loop antenna in a non-contact state, a resonance capacitor connected to both ends of the transmitting/receiving loop antenna, and receive processing portion connection terminals connected to the transmitting/receiving loop antenna. The driven loop antenna is constructed to have a loop wound in a single turn, and the transmitting/receiving loop antenna is constructed to have a loop wound in plural turns. According to this configuration, a wider frequency band of the frequency characteristic and a reduction of the power consumption can be achieved.
    Type: Application
    Filed: March 26, 2010
    Publication date: May 19, 2011
    Applicant: PANASONIC CORPORATION
    Inventors: Futoshi DEGUCHI, Youichirou HONDA, Masaaki SANO
  • Patent number: 7880680
    Abstract: A tag device that performs high-quality radio communication without radio wave radiation or receiving characteristics being deteriorated near a person's body and without hindering communication by another IC tag. A main loop section sends and receives radio waves. The main loop section is a metal foil and has the shape of a long thin loop. The area of the main loop section is smaller than the area of a dielectric substrate. The main loop section covers part of surfaces of the dielectric substrate and part of sides of the dielectric substrate so as to put the dielectric substrate inside the loop. The main loop section is mounted in a horizontal direction of the dielectric substrate. Each of capacitive load sections is a metal foil and has a load corresponding to a capacitance component.
    Type: Grant
    Filed: July 6, 2007
    Date of Patent: February 1, 2011
    Assignee: Fujitsu Limited
    Inventors: Takashi Yamagajo, Toru Maniwa, Manabu Kai
  • Patent number: 7768467
    Abstract: An easy-to-fabricate and relatively strong circularly polarized loop antenna of a simple construction is built. A circularly polarized loop antenna 1 has a loop section 11, which is made up of a loop-shaped conductor whose length is equal to 1 wavelength (?) of the transmitted and received signals, and a coupling section 12, made up of a conductor, is connected thereto at a prescribed point. The coupling section 12 is shaped such that it is connected to the loop section 11 at a connection point 201 at one end and extends along the loop section 11 throughout a length equal to ?/4. A reflective plate 2 is placed in a predetermined position in the vertical direction from the circumferential plane of the loop section 11, in parallel to the circumferential plane. In addition, the other end of the loop section 11 is connected to external circuitry carrying out the processing of signals transmitted and received via a first feed conductor 13 and a second feed conductor 14 and operates as a feed point, 200.
    Type: Grant
    Filed: June 9, 2005
    Date of Patent: August 3, 2010
    Assignee: Furuno Electric Company Limited
    Inventor: Tatsuhiko Iwasaki
  • Patent number: 7609213
    Abstract: A broadband antenna is capable of generating an upper resonant mode (at about 700 MHz) from a first radiating arm and a lower resonant mode (at about 500 MHz) from a second radiating arm. The first and second radiating arms are bent at least one time. An open end of the second radiating arm is extended toward an open end of the first radiating arm with a predefined distance there between. The predefined distance can be adjusted to improve the impedance matching of lower resonant mode, which can be further combined with the upper resonant mode to achieve a broad bandwidth covering the complete spectrum of digital TV channels (470-862 MHz).
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: October 27, 2009
    Assignees: Lite-On Technology Corp., National Sun Yat-Sen University
    Inventors: Kin-Lu Wong, Yu-Chan Yang, Wei-Yu Li, Saou-Wen Su, Jui-Hung Chou
  • Publication number: 20090160720
    Abstract: A planar antenna device (AD) for a TV receiver (R) comprises i) a loop antenna (LA) comprising first (E1) and second (E2) ends spaced one from the other, ii) a tuning means (TM) connected to the first (E1) and second (E2) ends of the loop antenna (LA) and arranged to control the frequency of the VHF TV signals this loop antenna (LA) is able to receive from command signals, iii) a first ground plane (GP1) cooperating with the loop antenna (LA) in order to act as a UHF monopole in receiving TV signals with UHF frequencies, iv) a first coupling means (CM1) coupled to the loop antenna (LA) at a first chosen location and arranged to deliver the received VHF signals, v) a second coupling means (CM2) coupled to the loop antenna (LA) at a second chosen location and arranged to deliver the received UHF signals, vi) an amplification means (AM) coupled to the first ground plane (GP1) and arranged to amplify TV signals, and vii) a switching means (SM) arranged to couple the amplification means (AM) to the first coupling
    Type: Application
    Filed: October 18, 2006
    Publication date: June 25, 2009
    Applicant: NXP B.V.
    Inventors: Efthimios Tsilioukas, Peter Boekestein
  • Publication number: 20090051612
    Abstract: An antenna coil formed on a substrate surface of an insulating substrate has conductor lines forming four sides of a basic loop shape. Furthermore, the antenna coil has corner lines at a corner portion of the loop. For example, by forming trimming lines on the inner side of one of the corner lines, it becomes possible to adjust the resonant frequency in various ways without considerably disturbing the shape of distribution of magnetic flux density generated by the antenna coil as a whole.
    Type: Application
    Filed: June 10, 2008
    Publication date: February 26, 2009
    Inventor: Yuichi Shimizu
  • Patent number: 7411559
    Abstract: A headset has a first and an optional second earpiece 12, 16 respectively coupled to a plug 30 via first and an optional second conductors 14, 20, 18, 22. An antenna loop section 36 has a first loop section 31 at least partially bound to a portion of the first conductor 20, and a second loop section 33 bound to at least a portion of the second conductor 22. Where bound, the first conductor and first loop section may be coaxial or side-by-side. The loop sections include inductors 42,44, and the conductors include ferrite rings 38,40 near the earpieces. A connector 24 mechanically holds the first and second conductors in proximity to one another, and also includes a conductive bridge 34 to electrically couple the first and second loop segments, which may be via a contact connection or a capacitive connection. Audio and RF signals are separated by frequency in a device 50 to which the headset is coupled.
    Type: Grant
    Filed: June 29, 2004
    Date of Patent: August 12, 2008
    Assignee: Nokia Corporation
    Inventors: Marko Leinonen, Marko Autti
  • Publication number: 20080055173
    Abstract: Described is the transformation of a mono-band antenna into a or multi-band antenna by adding matching circuits, in either serial or parallel fashion, to a mono-band antenna. The matching circuits contain reactive elements such as inductors and capacitors which create impedance matching for two or more frequency bands. These multi-band loop antennas can be used for frequencies extending from a few megahertz to several hundred megahertz. The method of tuning such multi-band antennas is also described.
    Type: Application
    Filed: September 1, 2006
    Publication date: March 6, 2008
    Inventor: Michael Chominski
  • Patent number: 7315287
    Abstract: An antenna device includes a rectangular parallelepiped base member made of a dielectric or magnetic material, a band-shaped first radiation conductor, including a plurality of divided first radiation conductor portions, spirally wound around the base member, a plurality of variable capacitance elements connected between pairs of adjacent portions and disposed on a upper surface of the base member, and a feeding conductor for supplying a tuning voltage to the variable capacitance elements. The first radiation conductor has first radiation conductor parts respectively formed on upper, lower, and rear side surfaces of the base member and first connecting through-holes passing through the upper and lower surfaces are provided in the base member, and the first radiation conductor part on the upper surface and the first radiation conductor part on the lower surface are connected to each another by the first through-holes, and the feeding conductor is disposed on the front surface of the base member.
    Type: Grant
    Filed: February 27, 2006
    Date of Patent: January 1, 2008
    Assignee: ALPS Electric Co., Ltd.
    Inventor: Makoto Shigihara
  • Patent number: 7307598
    Abstract: An antenna device includes a prism-shaped or plate-shaped base member made of a dielectric or magnetic material, band-shaped first and second radiation conductors wound around the base member and connected to each other, and a third radiation conductor wound around the base member and connected to the second radiation conductor. The first and second radiation conductors include a plurality of divided portions, and the divided first radiation conductor portions are connected in series by first variable capacitance elements, the divided second radiation conductor portions are connected in series by second variable capacitance elements, and a node between the first and second radiation conductors is used as a feeding end.
    Type: Grant
    Filed: February 24, 2006
    Date of Patent: December 11, 2007
    Assignee: ALPS Electric Co., Ltd.
    Inventor: Makoto Shigihara
  • Patent number: 7292195
    Abstract: An energy density diversity antenna (EDA) has a least a pair of antenna elements, whose feeding points are connected to outputs of a hybrid coupler configured such that a sum and a difference signal may exist at the feed points of the antenna elements. First reactive elements are respectively inserted in the antenna elements proximal the respective feed points. The antenna elements are joined at a point distal from the feed points by a second reactive element, and a third reactive element is coupled between feed lines coupled to the feed points at a location between the feed points and the outputs of the hybrid coupler.
    Type: Grant
    Filed: July 26, 2005
    Date of Patent: November 6, 2007
    Assignee: Motorola, Inc.
    Inventors: James P. Phillips, Andrew A. Efanov, Kristen M. Leininger
  • Patent number: 7289075
    Abstract: There are disposed first coupling conductors, which comprise a pair of coupling branch lines 1 and 2 connected to the first antenna conductor 3 and extend inward from the first antenna conductor. The coupling branch lines 1 and 2 have open ends 1a and 2a disposed so as to be adjacent to each other and be capacitively coupled to each other. The open ends 1a and 2a of the coupling branch lines 1 and 2 are located at closest or substantially closest portions to each other. The second antenna conductor 13 includes second coupling conductors, which comprise a pair of coupling branch lines 11 and 12 connected the second antenna conductor 13 and extending inward from the second antenna conductor. The coupling branch lines 11 and 12 have open ends disposed so as to be adjacent to each other and be capacitively coupled to each other. The open ends of the coupling branch lines 11 and 12 are located at closest or substantially closest portions to each other.
    Type: Grant
    Filed: December 7, 2004
    Date of Patent: October 30, 2007
    Assignee: Asahi Glass Company, Limited
    Inventors: Osamu Kagaya, Kiyoshi Oshima, Koji Ikawa
  • Patent number: 7253779
    Abstract: An antenna system comprising a plurality of antennas designed and oriented to provide one or more of radiation pattern, signal polarization and spatial diversity. The various diversity operational characteristics are achieved by using similar antennas physically oriented to provide the diversity attributes or by using dissimilar antennas, that is, antennas having different radiation pattern and/or signal polarization characteristics.
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: August 7, 2007
    Assignee: SkyCross, Inc.
    Inventors: Kerry L. Greer, Frank M. Caimi, Jason M. Hendler, Jay A. Kralovec
  • Patent number: 7071887
    Abstract: The present invention provides an antenna device capable of automatically obtaining excellent receiving sensitivity over a wide band. The antenna device comprises a rod-shaped base made of a dielectric material or a magnetic material; a stripe-shape radiating conductor divided into a plurality of radiating conductors wound around the base; and variable capacitive elements provided to correnspond to the same number of the radiating conductors. The radiating conductors and the variable capacitive elements are alternatively arranged on the base and are connected in series to each other, the radiating conductor having its one end connected to the variable capacitive element serves as an opening side and the variable capacitive element having its one end connected to the radiating conductor serves as a signal feeding side, and capacitance values of the variable capacitive elements increase or decrease in the same direction to be tuned to a predetermined frequency.
    Type: Grant
    Filed: January 21, 2005
    Date of Patent: July 4, 2006
    Assignee: Alps Electric Co., Ltd.
    Inventors: Makoto Shigihara, Yusuke Nakamura
  • Patent number: 7053846
    Abstract: An antenna includes a radiating ring element formed as a spherical sector or about a one-half wavelength circumference in natural resonance for obtaining uniform current distribution and enhancing the gain relative to the size of the antenna. A capacitive element, such as a gap, can be formed therein for forcing the radiating ring element to resonance. A variometer feeds the radiating ring element and is operative for varying feed impedance.
    Type: Grant
    Filed: October 27, 2003
    Date of Patent: May 30, 2006
    Assignee: Harris Corporation
    Inventor: Francis Parsche
  • Patent number: 7034760
    Abstract: An antenna device of transmission line type having two antenna elements opposed to each other, and a signal is fed between the two antenna elements. A variable-capacitance unit capable of changing the electrostatic capacity is provided at one or both of connection points at which opposite ends of the two antenna elements are connected to each other. Each variable-capacitance unit has a variable-capacitance diode, the electrostatic capacity of which changes according to a direct-current voltage applied between the anode and the cathode.
    Type: Grant
    Filed: March 17, 2004
    Date of Patent: April 25, 2006
    Assignee: NEC Corporation
    Inventor: Mitsuyuki Nakamura
  • Patent number: 6961024
    Abstract: An antenna for transmitting information by means of electromagnetic fields in free space is formed as a supertoroidal conductor, comprising a helical coil of wire with the coil itself being wound helically around a toroidal former to form a toroidally shaped coiled coil. Higher orders of supertoroid are formed by replacing the wire of the above first order supertoroidal conductor with a helical coil. The supertoroidal antenna is energized from a signal generator generating signals including frequencies not less than 2 c/l, where l is the length of conductor in the supertoroidal antenna. Both transmitting and receiving arrangements are disclosed.
    Type: Grant
    Filed: March 29, 2000
    Date of Patent: November 1, 2005
    Inventors: Nikolay Zheludev, Boris I. Kokorin
  • Patent number: 6960984
    Abstract: Methods and systems for compensating magnetic current loops provide current magnitude and phase uniformity within the magnetic current loops. A magnetic current loop is divided into k sections. Each of the k sections has a series reactance. Series reactive compensation is added to each of the k sections such that the reactive compensation substantially cancels the series reactance of each section. Adding reactive compensation to the loop that cancels the series reactance of each section of the loop provides current magnitude and phase uniformity along the loop at any given instant in time. As a result, the magnitude and phase of the magnetic field at a point in space can be controlled with precision to achieve a desired result, such as precise field cancellation or precise field generation.
    Type: Grant
    Filed: November 27, 2000
    Date of Patent: November 1, 2005
    Assignees: University of North Carolina, dBTag, Inc.
    Inventors: Leandra Vicci, Wayne D. Dettloff
  • Patent number: 6919857
    Abstract: Differential mode capacitively loaded magnetic dipole designs are provided for usage in various applications. Impedance matching may be accomplished with changes to antenna structures without concomitant changes in resonant frequency.
    Type: Grant
    Filed: January 27, 2003
    Date of Patent: July 19, 2005
    Assignee: Ethertronics, Inc.
    Inventors: Jeff Shamblin, Laurent Desclos, Gregory Poilasne, Sebastian Rowson
  • Patent number: 6906672
    Abstract: An antenna arrangement for use over a metallic surface in motor vehicles is adapted to improve reception in the AM frequency range. An FM loop includes two conductor sections separated by a capacitor. An AM probe extends from one of the conductor sections near an antenna feed line connector and isolates AM signals by an L-C circuit between the probe and the connection to the conductor section. Omnidirectional reception is achieved by a coplanar WB probe, FM probe and AM coiled loop between them, mounted to a substrate.
    Type: Grant
    Filed: July 25, 2003
    Date of Patent: June 14, 2005
    Assignee: R.A. Miller Industries, Inc.
    Inventors: Paul E. Miller, Paul A. Bogdans