With Antenna Ejection Or External Support Patents (Class 455/97)
  • Patent number: 10031238
    Abstract: Systems and methods for improved Global Positioning System (“GPS”) function employ two multiband, multiport antennas to receive GPS signals. The antennas also serve WiFi frequencies, and the system utilizes the received WiFi signal strength to correct the GPS reception pattern for detuning due to user contact or other factors. The correction is made via selective combination of the GPS signals from the antennas. In addition, a phase shifter in one of the signal paths is used to account for changes in device orientation and to maximize the upper hemisphere component of the GPS reception pattern.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: July 24, 2018
    Assignee: Motorola Mobility LLC
    Inventors: Umesh D. Navsariwala, Mohammed Abdul-Gaffoor, Prem K. Ganeshan, Richard Muryanto, Hariharan Muthukrishnan
  • Patent number: 8971816
    Abstract: An object of the present invention is to provide an improved and simplified mechanism for assisting in antenna direction adjustment. The object is achieved by a method in a wireless communication device 120 for assisting in direction adjustment of a directional antenna 125. The wireless communication device 120 is adapted to be connected to a wireless communication system 100 via a directional antenna 125. The wireless communication system 100 comprises a service node 150.
    Type: Grant
    Filed: January 31, 2008
    Date of Patent: March 3, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Peter Hakansson, Benny Lennartson
  • Patent number: 8918325
    Abstract: A signal processing device is provided, including a prediction error calculating unit that calculates an error signal between a left signal l(n) and a prediction signal of the left signal l (n) predicted from a right signal r(n), a gain adjusting unit that makes a gain adjustment and outputs an error signal, a first adder that adds the left signal l(n) and the error signal and outputs, and a second adder that adds the right signal r(n) and the error signal in opposite phase and outputs.
    Type: Grant
    Filed: May 17, 2010
    Date of Patent: December 23, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masaru Kimura, Bunkei Matsuoka
  • Patent number: 8774866
    Abstract: An Electrically Floating, Near Vertical Incidence, Skywave (NVIS) Antenna comprising an antenna element, a floating ground element, and a grounding element. At least part of said floating ground element is positioned between said antenna element and said grounding element. The antenna is separated from the floating ground element and the grounding element by one or more electrical insulators. The floating ground element is separated from said antenna and said grounding element by one or more electrical insulators.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: July 8, 2014
    Assignee: United States Department of Energy
    Inventors: Allen A. Anderson, Timothy G. Kaser, Paul A. Tremblay, Belva L. Mays
  • Patent number: 8725214
    Abstract: A Method of Tuning a Frequency Agile Electrically Small Tactical AM Broadcast Band Antenna System (NC#102174) comprising determining a desired operating frequency for a frequency agile electrically small tactical AM broadcast band antenna system; configuring tophat jumpers of the frequency agile electrically small tactical AM broadcast band antenna system to operate near the desired operating frequency; erecting an antenna of the frequency agile electrically small tactical AM broadcast band antenna system; transmitting a signal through the frequency agile electrically small tactical AM broadcast band antenna system; adjusting inductor values of an antenna tuning unit of the frequency agile electrically small tactical AM broadcast band antenna system so that the frequency agile electrically small tactical AM broadcast band antenna system operates at the desired operating frequency.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: May 13, 2014
    Assignee: The United States of America, as Represented by the Secretary of the Navy
    Inventor: Ken Allen Crawley
  • Patent number: 8670803
    Abstract: The invention relates to a radiofrequency communication device that comprises a gripping beating body having a surface; an electronic and/or electric circuit extending in the gripping beating body; at least one antenna provided in the vicinity of the electronic circuit. The device includes a connection circuit for connection to the antenna, that is provided at least partially in the gripping beating body and extends from the electronic circuit up to connection points of the antenna, said antenna connection points being accessible from the outside of the beating body.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: March 11, 2014
    Assignee: Gemalto SA
    Inventors: Jean-Francois Schuh, Didier Bonnet
  • Patent number: 8526535
    Abstract: A communications device, in one aspect as a portable wireless communications device, includes an in-phase modulator and power amplifier that receives a baseband I signal and modulates and amplifies the I signal. A quadrature modulator and power amplifier receives a baseband Q signal and modulates and amplifies the Q signal. A power combiner sums and outputs the I and Q signals. An I demodulator circuit receives a signal fed back from the I power amplifier and demodulates the fed back signal to produce demodulated I signals. A Q demodulator circuit receives a signal fed back from the Q power amplifier and demodulates the fed back signal to produce demodulated Q signals. A processor compares the digital, baseband I and Q signals with a demodulated I and Q signals to compensate for amplitude, frequency and phase modulation errors.
    Type: Grant
    Filed: June 18, 2012
    Date of Patent: September 3, 2013
    Assignee: Blackberry Limited
    Inventors: Lizhong Zhu, George Soliman Mankaruse, Michael Stephen Corrigan, Perry Jarmuszewski, Oleksiy Kravets, Kent Arnold Nickerson, Nagula Tharma Sangary
  • Patent number: 8422947
    Abstract: A communication device includes a communication circuit part, a transmission path for signals, a ground, a coupler electrode, and a resonance part. The coupler electrode includes an upper flat part as an electrode, a support, and a connecting portion. The support supports the upper flat part. Thus, the upper flat part faces the ground and is separately placed therefrom at a height only enough to ignore the wavelength of the signal, while having a flexible portion which is elastically deformable in the height direction. On the connecting portion, the other end of the support is connected to the transmission path. The resonance part enlarges a current flowing into the coupler electrode through the transmission path. A micro dipole is a line segment connecting between the center of accumulated electric charge in the coupler electrode and the center of mirror charge accumulated in the ground.
    Type: Grant
    Filed: March 3, 2010
    Date of Patent: April 16, 2013
    Inventor: Satoshi Konya
  • Patent number: 8374660
    Abstract: An apparatus for reducing the electromagnetic interference between two or more co-located antennas is described herein. In one embodiment, the apparatus is positioned proximate to a second antenna for intercepting electromagnetic energy radiated from a first antenna during transmission of a signal. To reduce interference at the second antenna, the apparatus includes a plurality of resonant circuit elements, each being configured to resonate at or near a carrier frequency of the transmitted signal for redirecting at least a portion of the electromagnetic energy away from the second antenna. A method for reducing the electromagnetic interference between two or more antennas coupled to a wireless communication device is also disclosed herein.
    Type: Grant
    Filed: January 4, 2007
    Date of Patent: February 12, 2013
    Assignee: Motion Computing, Inc.
    Inventors: Todd W. Steigerwald, Jerry Mayfield
  • Patent number: 8306588
    Abstract: This mobile device includes a control portion determining whether or not a selection antenna module and a selection circuit module are matched to each other, and the control portion controls radio communication by the selection antenna module and the selection circuit module to be disabled when the selection antenna module and the selection circuit module are not matched to each other and controls radio communication by the selection antenna module and the selection circuit module to be enabled when the selection antenna module and the selection circuit module are matched to each other.
    Type: Grant
    Filed: July 27, 2010
    Date of Patent: November 6, 2012
    Assignee: Funai Electric Co., Ltd.
    Inventor: Naoyuki Wakabayashi
  • Patent number: 8208882
    Abstract: An antenna sense circuit includes a detector and a level shifter. The detector consists of a voltage drop component, a transistor component, a first resistor component, and a second resistor component. The voltage drop component is coupled between a first power supply and a first terminal of the first resistor component. The second resistor component has a first terminal coupled to a second terminal of the first resistor component and a second terminal coupled to a second power supply. The transistor component has a control terminal coupled to the second terminal of the first resistor component and the first terminal of the second resistor component, a second connection terminal coupled to the first power supply, and a first connection terminal for outputting a first detecting signal. The level shifter adjusts a voltage level of the first detecting signal to generate a second detecting signal.
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: June 26, 2012
    Assignee: Wistron NeWeb Corporation
    Inventors: Chen-An Hsieh, Cheng-Hsiung Hsu, Tsai-Wang Chang
  • Patent number: 7941194
    Abstract: Systems and methods are disclosed for the co-location of radio frequency (RF) antennas in portable devices, portable devices and their docking stations and related systems, and devices with restrictive space constraints to allow for simultaneous receive (RX) and transmit (TX) operation without degradation. The systems and methods disclosed overcome RX channel degradation, receiver performance, and other problems seen in prior solutions. More particularly, transmit and receive antennas are oriented to provide for cross-polarization of their electro-magnetic fields, are oriented to allow one or both antenna to fall within null regions of the other antenna, and/or oriented with both cross-polarization and null region considerations in mind. Other variations and implementations are also described.
    Type: Grant
    Filed: November 16, 2007
    Date of Patent: May 10, 2011
    Assignee: Silicon Laboratories Inc.
    Inventors: Nisha Ganwani, Greg Allan Hodgson, Russell Croman, Jonathan D. Pearce, Wade R. Gillham
  • Patent number: 7725083
    Abstract: A wireless communication device such as a cellular telephone handset is disclosed including a housing having a transceiver circuit disposed therein. An internal antenna is also disposed within the housing which is RF connected to the transceiver circuit. An external, retractable antenna is mounted on the housing and is selectively movable between a retracted position and an extended position. The external, retractable antenna is RF connected to the transceiver circuit. When the external antenna is retracted, the internal antenna functions as a primary antenna. Should the need arise, the external antenna may be extended to improve the quality of the radio signals.
    Type: Grant
    Filed: January 5, 2000
    Date of Patent: May 25, 2010
    Assignee: Centurion Wireless Technologies, Inc.
    Inventor: Jonathan Lee Sullivan
  • Patent number: 7725132
    Abstract: A system for reducing electromagnetic interference between two or more co-located antennas is described herein. In one embodiment, the system includes a first antenna for transmitting a first signal within a first frequency band, and a second antenna for operating within a second frequency band during transmission of the first signal. The first and second frequency bands may be substantially identical, or may occupy overlapping or nearby channels within the radio frequency spectrum. The system also includes an apparatus. In one embodiment, the apparatus is positioned proximate to the second antenna for intercepting the electromagnetic energy radiated from the first antenna during transmission of the first signal. In other embodiments, the apparatus may be positioned proximate to the first antenna for intercepting the electromagnetic energy radiated from the second antenna during transmission of a second signal.
    Type: Grant
    Filed: June 13, 2007
    Date of Patent: May 25, 2010
    Assignee: Motion Computing, Inc.
    Inventors: Todd W. Steigerwald, Jerry Mayfield
  • Patent number: 7546153
    Abstract: An antenna mounting device for a mobile terminal comprises a cradle configured to detachably install to the mobile terminal and a rotary bar rotatably coupled to the cradle, configured to rotate with respect to the cradle. The antenna mounting device also comprises an antenna coupled to the rotary bar, configured to rotate with the rotary bar. The rotation of the antenna is configured to control a reception angle of the antenna. The antenna mounting device may further comprise stopping protrusions formed on the cradle, configured to mate with stopping grooves formed in the mobile terminal to fix the cradle to the mobile terminal.
    Type: Grant
    Filed: July 19, 2005
    Date of Patent: June 9, 2009
    Assignee: LG Electronics, Inc.
    Inventor: Dong-Gook Kang
  • Patent number: 7509143
    Abstract: A telecommunications card which includes a cavity in which an antenna structure is movably mounted between a first position in which the antenna structure is substantially located within the cavity and a second position in which the antenna structure is extended from the cavity, the telecommunications card further including moving mechanism for moving the antenna structure from the first position to the second position, the antenna structure comprising a slide portion and an antenna portion which are movably connected to each other, wherein the antenna structure further including an erecting mechanism for erecting the antenna portion from the second position to a third position suitable for wireless communication with a telecommunications network.
    Type: Grant
    Filed: July 18, 2001
    Date of Patent: March 24, 2009
    Assignee: Option
    Inventors: Richard Lintern, Charles Dillon, Nick Ward
  • Patent number: 7471933
    Abstract: A computer host including a casing, an antenna and an antenna holder is provided. More specifically, the antenna holder has an opening perpendicular to one side of the host and is located in the back side of the host and close to the intersection of a top, a side and the back side of the host so that an antenna fixed into the antenna holder can rotate and swing on a higher place relative to the casing of the host. This means that the antenna can be adjusted to any direction to receive the best signals while the host is either straightened up or lay down.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: December 30, 2008
    Assignee: Giga-Byte Technology Co., Ltd.
    Inventor: Wen-Hao Lin
  • Patent number: 7457650
    Abstract: A portable radio communication apparatus is provided with a boom portion having both ends connected with a housing of the portable radio communication apparatus and having a central portion located between both ends. In the portable radio communication apparatus, at least one through hole is formed between the boom portion and the housing. The boom portion includes a central portion and two end portions. The central portion extends in parallel to a width direction of the portable radio communication apparatus, and the two end portions are bent respectively from both ends of the central portion.
    Type: Grant
    Filed: July 30, 2003
    Date of Patent: November 25, 2008
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroshi Iwai, Shinji Kamaeguchi, Kenichi Yamada, Toshihiro Asahina, Atsushi Yamamoto
  • Patent number: 7421258
    Abstract: A compact industrial process transmitter is provided having an electronics module that includes a top surface with a plurality of lead attachment points thereon. At least one of the lead attachment points disposed on the top surface of the compact temperature transmitter electronics module includes a upwardly extending external lead attachment clip. In some aspects, a plurality of upwardly extending lead attachment clips as well as lead attachment points that have a lead wire engaging surface that is substantially flush with or raised above the top surface of the compact temperature transmitter electronics module.
    Type: Grant
    Filed: October 10, 2003
    Date of Patent: September 2, 2008
    Assignee: Rosemount Inc.
    Inventors: Dirk W. Bauschke, Hiep Huu Nguyen
  • Patent number: 7389127
    Abstract: Short-distance radio communication equipment having a Bluetooth communication feature can maintain a stable reception status by automatically adjusting the reception status of an antenna when the reception status thereof deteriorates.
    Type: Grant
    Filed: February 7, 2002
    Date of Patent: June 17, 2008
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yasuhiko Nomiyama, Hideto Miyazaki
  • Patent number: 7369879
    Abstract: A system for reducing electromagnetic interference between two or more co-located antennas is described herein. In one embodiment, the system includes a first antenna for transmitting a first signal within a first frequency band, and a second antenna for operating within a second frequency band during transmission of the first signal. The first and second frequency bands may be substantially identical, or may occupy overlapping or nearby channels within the radio frequency spectrum. The system also includes an apparatus. In one embodiment, the apparatus is positioned proximate to the second antenna for intercepting the electromagnetic energy radiated from the first antenna during transmission of the first signal. In other embodiments, the apparatus may be positioned proximate to the first antenna for intercepting the electromagnetic energy radiated from the second antenna during transmission of a second signal.
    Type: Grant
    Filed: March 2, 2004
    Date of Patent: May 6, 2008
    Assignee: Motion Computing, Inc.
    Inventors: Todd W. Steigerwald, Jerry Mayfield
  • Patent number: 7164933
    Abstract: An apparatus for reducing the electromagnetic interference between two or more co-located antennas is described herein. In one embodiment, the apparatus is positioned proximate to a second antenna for intercepting electromagnetic energy radiated from a first antenna during transmission of a signal. To reduce interference at the second antenna, the apparatus includes a plurality of resonant circuit elements, each being configured to resonate at or near a carrier frequency of the transmitted signal for redirecting at least a portion of the electromagnetic energy away from the second antenna. A method for reducing the electromagnetic interference between two or more antennas coupled to a wireless communication device is also disclosed herein.
    Type: Grant
    Filed: March 2, 2004
    Date of Patent: January 16, 2007
    Assignee: Motion Computing, Inc.
    Inventors: Todd W. Steigerwald, Jerry Mayfield
  • Patent number: 7089037
    Abstract: A system and method for maximizing throughput in a telecommunications system is disclosed. The system includes an antenna system using fixed narrow beams that transmits and allows improved capacity gain to be realized without degrading call performance. The system can include: forming a plurality of directional narrow uplink beams at a main antenna; receiving communications signals on the plurality of directional uplink beams; periodically scanning across the plurality of uplink beams associated with a given call; assessing a set of beams from the plurality of uplink beams based upon a quality of reverse link information; selecting a first subset from the set of beams to be turned off when the quality of reverse link information reaches a first predetermined value; and instructing the subset to not transmit a traffic channel and to continue to transmit the power control sub channel.
    Type: Grant
    Filed: January 15, 2003
    Date of Patent: August 8, 2006
    Assignee: Nortel Networks Limited
    Inventor: Mark Harris
  • Patent number: 7039367
    Abstract: A communications system and method utilizes an unmanned surface vehicle (USV) capable of collecting data about an environment in which the USV resides. At least one micro-aerial vehicle (MAV), equipped for unmanned flight after a launch thereof, is mounted on the USV. Each MAV has onboard radio frequency (RF) communications. Each MAV launched into the air transmits the data collected by the USV using the MAV's RF communications.
    Type: Grant
    Filed: January 31, 2003
    Date of Patent: May 2, 2006
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Daniel Kucik
  • Patent number: 6990322
    Abstract: An apparatus and method for equipping a locomotive with a modular radio communication system capable of being expanded to incorporate future improvements in radio and data communication electronics. The modular radio communication system provides for the installation of a standardized mounting plate and housing onto the rooftop of the locomotive to reduce the need to make extensive mechanical and electrical modifications to the locomotive when the radio communications system is updated. Sunscreens and vent openings in the standard mounting plate and housing work to reduce the temperature of the internal components of the modular radio communications system.
    Type: Grant
    Filed: October 30, 2001
    Date of Patent: January 24, 2006
    Assignee: General Electric Company
    Inventors: Jeff Harris, William Neeley, Brian Schroeck, Scot Stewart
  • Patent number: 6959173
    Abstract: A server downloads data to a mobile station mounted in a vehicle through a roadside device using dedicated short range communication (DSRC). The server is capable of computing downloading transmission rate from the roadside device to the mobile station and maximum speed of the vehicle that enables completion of the downloading of the data to the mobile station. The maximum speed is computed based on the computed downloading transmission rate, a communication area of the roadside device, and size of the data. The server is further capable of notifying the maximum speed to the mobile station. By contrast, the mobile station is capable of transmitting information relating to the data to the server, receiving the data to be downloaded in the communication area of the roadside device, and notifying the maximum speed received from the server to a crew of the vehicle.
    Type: Grant
    Filed: February 11, 2003
    Date of Patent: October 25, 2005
    Assignee: Denso Corporation
    Inventor: Takeo Kawai
  • Patent number: 6944429
    Abstract: A gutter-like antenna tube storage part having a half cylindrical shape, is recessed downward from a flat part of a battery storage part, integrally with a rear case of a housing of a portable terminal device. Therefore, the section modulus of the rear case in terms of the strength of materials can be large, and thus deterioration of the rigidity can be prevented even in the case the device main body is made thinner.
    Type: Grant
    Filed: October 23, 2000
    Date of Patent: September 13, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Toshiyasu Kitamura, Nobutoshi Hamada, Katsuhisa Furukawa
  • Patent number: 6928271
    Abstract: A cholesteric liquid crystal display has pixel address circuits (84) with an input (12) for receiving a data signal and a plurality of outputs, wherein each output is for applying a pixel drive signal to a respective portion of the liquid crystal material (20), and wherein the pixel drive signal for each output is independently switchable by the pixel address circuit to each output. This provides spatially-separated sub-pixels, and a number of the sub-pixels can be addressed in order to provide a grey scale output for each pixel. Each pixel drive signal can however be a two-level digital signal.
    Type: Grant
    Filed: March 26, 2002
    Date of Patent: August 9, 2005
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: David A. Fish, Neil C. Bird
  • Patent number: 6917793
    Abstract: An antenna assembly has an antenna set, a rotation assembly and a control circuit for driving the rotation assembly to rotate to adjust receiving angel of the antenna set. The control circuit can learn to adjust remote signals represented different channel number on a remote control to automatically control the receiving angle and direction of an antenna set. Thus, the antenna assembly can be suitable to general remote control to automatically adjust the antenna set to search the wireless bands. Besides, the control circuit further stores data related to the wireless bands with the corresponding channel number to be easy for user turn to specific wireless band without searching step.
    Type: Grant
    Filed: September 16, 2002
    Date of Patent: July 12, 2005
    Assignee: Cheng-Fa Wang
    Inventor: Cheng-Si Wang
  • Patent number: 6904296
    Abstract: A balanced antenna is provided for a mobile telephone which couples to the outputs from a balanced power amplifier stage without needing connection through a lossy conversion circuit. The balanced antenna comprises two radiating elements positioned opposite one another with the feed points positioned so that the radiating fields from the two elements superpose. A floating ground is also provided which reduces the effects of components located on the PCB under the antenna.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: June 7, 2005
    Assignee: Nokia Mobile Phones Limited
    Inventors: Francis Geeraert, Hans Erik Gram
  • Patent number: 6813481
    Abstract: A mobile radio machine of folding type with simple structure which can receive a pull-out type whip antenna and function as antenna even when the antenna is restored is disclosed. In the mobile radio machine, when the antenna is pulled out, a change-over circuit 8 connects a radio circuit 12 with an impedance matching circuit 9 and supplies power to a linear antenna element 1 through a feeding terminal 5, so that only the linear antenna element 1 functions as antenna. When the antenna is restored, the change-over circuit 8 connects the radio circuit 12 with an impedance matching circuit 10 and supplies power to a coil antenna element 3 through a feeding terminal 6, and therefore only the coil antenna element 3 functions as antenna. Thus, antenna can be used in a small size, folding type mobile radio machine in simple structure.
    Type: Grant
    Filed: October 24, 2000
    Date of Patent: November 2, 2004
    Assignee: NEC Corporation
    Inventor: Yoshiyuki Ide
  • Patent number: 6810275
    Abstract: A hand-held communication device with vertically oriented antenna includes a housing with a main body and a cover hingedly attached to the main body for movement between a closed position and an open position. The main body has a control surface enclosed by the cover in the closed position and accessible for operation with the cover in the open position. An antenna is movably affixed to the cover so as to form a portion of the cover with the cover in the closed position and to extend generally vertically from the cover with the cover in the open position and the communication device housing held in an operative orientation.
    Type: Grant
    Filed: December 20, 2000
    Date of Patent: October 26, 2004
    Assignee: Motorola, Inc.
    Inventors: David W. Edwards, Kenneth H. Schmidt, Richard E. Grams
  • Patent number: 6751476
    Abstract: An information processing apparatus utilizes a function of a wireless communication card including a control section and a wireless communication section. The apparatus includes a body, and an antenna supported by the apparatus main body. A slot is provided to the body and configured to detachably insert the card therein. A first connector is provided to the apparatus main body, and configured to connect the control section to the body when the card is inserted in the slot. A second connector is provided to the body, and configured to connect the wireless communication section to the antenna in a state where the card is inserted the slot.
    Type: Grant
    Filed: October 25, 2002
    Date of Patent: June 15, 2004
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshiyuki Masaki, Kenji Hibi
  • Publication number: 20030181227
    Abstract: In an electronic device having a wireless communication module and an antenna, the antenna is designed such that at least a portion of the antenna is formed from a conductive tape and is shaped to have dimensions such that when the antenna is mounted in contact with a mounting surface on the electronic device, a frequency characteristic of the antenna has a value determined in consideration of a predetermined dielectric constant of the mounting surface. Mounting location indicators are included on the mounting surface, whereby during assembly the antenna can be mounted accurately. The antenna is formed from the conductive tape in a substantially planar shape such that the antenna can be mounted effectively in accordance with the mounting location indicators on the mounting surface within the limited space inside the electronic device.
    Type: Application
    Filed: December 20, 2002
    Publication date: September 25, 2003
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Hirota Toshiyuki
  • Patent number: 6597926
    Abstract: Antenna-gain diversity is obtained in the following manner. A first and a second antenna element (A1,A2) are electro-magnetically coupled. A switchable antenna-coupler (SAC) is switchable between: a first antenna-coupling state (S1) in which the first and the second antenna element (A1,A2) are electrically coupled to an antenna-signal node (N); and a second antenna-coupling state (S2) in which the first antenna element (A1) is electrically coupled to the antenna-signal node (N) and the second antenna element (A2) is electrically coupled to signal ground (GND). This type of antenna-gain diversity is particularly suitable for use in an application which needs to be relatively small in size or relatively inexpensive, or both, such as a cordless telephone, for example.
    Type: Grant
    Filed: February 25, 1999
    Date of Patent: July 22, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Leo Rek
  • Publication number: 20030096637
    Abstract: A multi-band compressed loop antenna is formed of multiple, directly and/or indirectly connected, compressed loops for use in a communication device to exchange energy over multiple frequency bands of operation. Each loop is formed by multiple and numerous segments arrayed in multiple diverse directions which forms a compressed loop so that the area of the antenna is decreased by combining such compressed loops. The multiple loops provide for resonances in multiple discrete frequency bands of operation. The multiple loops are arrayed in different configurations that include nested (concentric) and non-nested (non-concentric) loops as well as closely located and separated loops on the same or different layers of single or multi-layer structures.
    Type: Application
    Filed: November 9, 2001
    Publication date: May 22, 2003
    Inventors: Walter John Keller, Osbaldo Jose Romero, Jesada Sivaraks, Robert Paul Garcia
  • Patent number: 6400931
    Abstract: A card-like wireless communication device including at least a frame part and an antenna structure, the antenna structure comprising an antenna part and fixing means for arranging the antenna part in connection with the frame part. The card-like wireless communication device also includes a first part and a second part, the parts being arranged to be movable in relation to each other in at least the longitudinal direction of the card-like wireless communication device. The first part is arranged as the frame part and the second part is arranged as the antenna part which can be moved in at least two different positions.
    Type: Grant
    Filed: February 9, 1999
    Date of Patent: June 4, 2002
    Assignee: Nokia Mobile Phones Limited
    Inventors: Sami Inkinen, Timo Herranen
  • Publication number: 20020045427
    Abstract: A method (300) for receiving radio signal comprises the steps of: receiving (301, 303) first and a second received signal components using first and second antennas having different properties; processing (305) a received signal component to produce a sampled signal component; producing (307) at least one combined signal, which is a linear combination of at least two sampled signal components; and selecting (306) at least one set of complex values for coefficients of the linear combination so that a quality of a combined signal is at least equal to the quality of that sampled signal components having the best quality. Furthermore, the antennas are alternately connected (302, 304) via a switching element to radio frequency means so that the received signal components are interleaving and so that first and second parts of a certain piece of transmitted information are received with the first and second antennas, respectively. A corresponding receiver device is also presented.
    Type: Application
    Filed: October 16, 2001
    Publication date: April 18, 2002
    Inventors: Saku Lahti, Ilkka Kontola
  • Publication number: 20020022460
    Abstract: A telecommunications card comprising a cavity in which an antenna structure is movably mounted between a first position in which the antenna structure is substantially located within the cavity and a second position in which the antenna structure is extended from the cavity, the telecommunications card further comprising moving means for moving the antenna structure from the first position to the second position, the antenna structure comprising a slide portion and an antenna portion which are movably connected to each other, characterised in that the antenna structure further comprises erecting means for erecting the antenna portion from the second position to a third position suitable for wireless communication with a telecommunications network.
    Type: Application
    Filed: July 18, 2001
    Publication date: February 21, 2002
    Applicant: OPTION INTERNATIONAL
    Inventors: Richard Lintern, Charles Dillon, Nick Ward
  • Patent number: 6246891
    Abstract: To enable use of an intelligent mobile communication unit (1) in areas where there are restrictions on the emission of radio frequency energy, the unit is provided with means (3) for actively preventing radio frequency radiation from the unit (1) even if non-radio frequency energy emitting parts of the unit (1) are operable.
    Type: Grant
    Filed: November 19, 1997
    Date of Patent: June 12, 2001
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventors: B. Johanna Isberg, Mikael Dahlkvist, L. Fredrik Liljegren, Ulf C. Björkengren, Anders Khullar
  • Patent number: 6212400
    Abstract: An antenna device is provided that is particularly suitable for mobile radio telephone device. The antenna device has a first helix antenna, a helix antenna connectible to the first helix antenna as well as an extensible rod antenna. In the extended condition of the rod antenna, a connector element connects only the rod antenna to the first helix antenna. In the retracted condition of the rod antenna, the connector element connects only the second helix antenna to the first helix antenna. An antenna device having a low space requirement is thus created. It is simultaneously assured that, regardless of the retracted or extended condition of the rod antenna, an antenna device that is matched to the optimum transmission/reception power is always formed by a combination of two antennas.
    Type: Grant
    Filed: April 15, 1998
    Date of Patent: April 3, 2001
    Assignee: Siemens Aktiengesellschaft
    Inventor: Ralf Scholz
  • Patent number: 6097307
    Abstract: A transmitting unit of a wireless security system having randomized successive ("rolling") verification codes transmits a different synchronization code each time that the transmitter unit is powered up. After power up, a pseudo-random value is generated by a pseudo-random number generator. The pseudo-random value is at least in part dependent upon a manipulation of a manually-operable switch of the transmitting unit. The pseudo-random value is incorporated into the first synchronization code transmitted after the first power up. If power to the transmitting unit is then interrupted and then resupplied, for example by removing and then replacing a battery, then the pseudo-random number generator generates another pseudo-random value, the value again depending at least in part upon a manipulation of the manually-operable switch. The pseudo-random value is then incorporated into the first synchronization code transmitted after the second power up.
    Type: Grant
    Filed: August 15, 1997
    Date of Patent: August 1, 2000
    Assignee: National Semiconductor Corporation
    Inventor: Hubert W. Utz
  • Patent number: 5909653
    Abstract: In a portable radio device having a speaker, key buttons, and microphone arranged on the front surface of the case, an antenna support mechanism supports an extended rod-shaped antenna on the top surface of the case. The antenna support mechanism allows rotation of the antenna, which is extended parallel to the front surface of the case, away from the front surface, and holds the antenna in a locked state with respect to the case when the angle of rotation reaches a prescribed angle with respect to the front surface of the case. Accordingly, the antenna can be distanced from the user's face during use and degradation of antenna performance can be prevented.
    Type: Grant
    Filed: November 21, 1995
    Date of Patent: June 1, 1999
    Assignee: NEC Corporation
    Inventors: Minoru Imura, Naoki Hirasawa
  • Patent number: 5819185
    Abstract: A portable satellite communication apparatus constituted by a body portion and an antenna portion, wherein the antenna portion is attached on an azimuth angle adjustor provided on the body portion so that the upper surface of the antenna portion is made to be the transmission/reception direction of radio waves and the antenna portion is made rotatable so as to act also as a cover for covering the body portion. The antenna portion can be adjusted with respect to its azimuth angle, elevation angle and polarization angle. A panel portion and a handling instruction indicating portion are provided on the upper surface of the body portion and a lamp is provided on the antenna support portion so as to illuminate the panel portion and the handling instruction indicating portion to facilitate the handling of the apparatus in the night or the like.
    Type: Grant
    Filed: June 5, 1996
    Date of Patent: October 6, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Koichi Umezawa, Takashi Ohwada, Shiro Fujimori, Shiho Nakagawa, Minako Sasahara, Tohru Higashihara
  • Patent number: 5819162
    Abstract: An electromagnetic interference (EMI) shield for a handheld cellular phone that is particularly useful for shielding a hearing aid against EMI from the phone's antenna. The device includes a base and a flap laminated with a metallic shielding. The base attaches to the receiver end of the cellular phone and the flap rests over the base when the phone is not in use. In operation, the flap extends away from the base forming an enclosure about the user's ear for shielding the hearing aid from EMI when the phone is in use.
    Type: Grant
    Filed: July 31, 1996
    Date of Patent: October 6, 1998
    Assignee: Northern Telecom Limited
    Inventors: Charles L. Spann, Michael J. Lynch
  • Patent number: 5797084
    Abstract: A small radio communication unit which requires no antenna adjustment is provided by using small chip antennas whose gain is not degraded and which have a wide bandwidth.
    Type: Grant
    Filed: June 14, 1996
    Date of Patent: August 18, 1998
    Assignee: Murata Manufacturing Co. Ltd
    Inventors: Teruhisa Tsuru, Harufumi Mandai, Koji Shiroki, Kenji Asakura
  • Patent number: 5774794
    Abstract: An antenna for radio communications such as portable telephone systems including a rod-form antenna element installed in the case of a radio communication set so that the antenna element can be retracted and pulled out with one portion of the antenna element remains outside of the case when the antenna element is accommodated inside the case; an impedance matching device connected to the feeding point of the antenna element and to the radio communication set; a stub which is a grounded conductive member and is installed so as to surround the outer circumference of the antenna element without touching the antenna element when the antenna element is accommodated inside the case. The base end of the antenna element and the base end of the stub are electrically coupled when the antenna element is completely accommodated inside the case so that good impedance matching can be obtained even when the antenna element is accommodated inside the case and that incoming calls are received without any failure.
    Type: Grant
    Filed: April 12, 1995
    Date of Patent: June 30, 1998
    Assignee: Harada Kogyo Kabushiki Kaisha
    Inventor: Takashi Kido
  • Patent number: 5706332
    Abstract: A portable telephone with a fundamental structure consisting of a first housing with a built-in receiver and a second housing with a built-in transmitter which are connected around a hinge section in a rotatable manner, which further has biasing means for biasing the first housing and the second housing for their unfolding, attaching means for attaching the first housing and the second housing and detaching means for detaching the attached housings. An antenna is attached to the second housing in a rotatable manner.The first housing and the second housing are folded when the telephone is not in use. For reception or transmission, the attached first housing and second housing and the attached antenna are detached to unfold the telephone to set a usable state by a one-touch operation with a slide button.
    Type: Grant
    Filed: September 22, 1995
    Date of Patent: January 6, 1998
    Assignee: NEC Corporation
    Inventor: Michio Nagai
  • Patent number: 5659889
    Abstract: A radio transceiver of the present invention includes a transmission line within a housing. The transmission line is comprised of a hollow center conductor and an outer conductor, both connected to a transceiver circuit. The transmission line is also connected to a low impedance connector which is coupled to the housing. A retractable 1/2 wave antenna having an integral matching section will be matched to a transceiver circuit when extended. When the antenna is retracted, the antenna is retracted within the center conductor and acts as a 1/4 wave antenna and will still be matched to the transceiver circuit.
    Type: Grant
    Filed: January 4, 1995
    Date of Patent: August 19, 1997
    Assignee: Centurion International, Inc.
    Inventor: Mark G. Cockson
  • Patent number: 5551069
    Abstract: A radio apparatus, particularly a radio telephone has an antenna which, rather than extending away from the housing of the apparatus, is bent around the housing to overlap it in a clip-like formation. The antenna acts as a fixed antenna to receive and transmit radio signals but is less vulnerable to damage and breakage their conventional fixed antennas. The antenna also acts a clip enabling the apparatus to be clipped over a pocket or belt.
    Type: Grant
    Filed: August 2, 1993
    Date of Patent: August 27, 1996
    Assignee: Nokia Mobile Phones Ltd.
    Inventors: Peter D. Harrison, Sarah Hodgkinson