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| Number | Title | Issue Date |
| 8165552 | Method and system for identifying radio frequency identification (RFID) tag location using a switchable coil Aspects of a method and system for identifying a radio frequency identification (RFID) tag location using a switchable coil are presented. Aspects of the systems may include one or more processors that enable selection of an inductor coil from a plurality of inducto... | 04/24/2012 |
| 8019302 | Integrated air loop antenna and transformer antenna assembly Systems and methods are disclosed for an integrated air loop antenna and transformer antenna assembly that provides improved performance in receiving RF signals and AM broadcast channels, in particular. In one embodiment, an air loop antenna is coupled to a transfor... | 09/13/2011 |
| 7319433 | Wideband antenna device with extended ground plane in a portable device An antenna device for a portable device has an antenna loop of conducting material to be connected to radio circuitry in the portable device. The antenna loop is positioned opposite a ground plane of a PCB. Also, the antenna device also comprises at least one batter... | 01/15/2008 |
| 7158819 | Antenna apparatus with inner antenna and grounded outer helix antenna A dual-band cellular telephone antenna. A monopole antenna is tuned to a first resonant frequency of operation. A first helical antenna is coupled to the monopole antenna and has turns surrounding the monopole antenna, where the first helical antenna is tuned to a s... | 01/02/2007 |
| 7065379 | Portable radio terminal equipment having conductor for preventing radiation loss A portable radio terminal where the total length of a terminal body and an antenna is less than ½ wavelength. The terminal equipment includes a conductor connected to a printed circuit board in the terminal body so that an electrical equivalent length is ½ wavelen... | 06/20/2006 |
| 7043214 | Tower discovery and failover Described is a communication system including wireless client devices. In the described system, the client devices may be wrist-worn watches such as are in common use today, except that the watches are specially configured to receive transmissions from broadcast tow... | 05/09/2006 |
| 6975834 | Multi-band wireless communication device and method The present invention relates to a wireless communication device, such as a transponder, that has a plurality of antennas for multi-frequency usage. The wireless communication device comprises a control system, communication electronics, memory, and the aforemention... | 12/13/2005 |
| 6960016 | Wristband or bracelet adjustable in length, in particular a watchband, including an electrical conductor embedded in its thickness There is disclosed a wristband for a portable electronic instrument including at least a first wristband strand (50) including outer and inner faces and one end (50A) of which is intended to be fixed to a case of a portable electronic instrument, this ... | 11/01/2005 |
| 6950642 | System and method for reducing noise in a recording receiver An apparatus and method is related to wireless communication devices with a reduced-noise recording receiver. The recording receiver receives a transmitted signal, converts the received signal to a digital base-band signal and stores the digitized base-band signal i... | 09/27/2005 |
| 6940466 | Enhanced magnetic field communication system Devices and methods are provided to enhance magnetic field communication. One aspect of the present subject matter relates to a method for transmitting and receiving signals using an antenna element electrically connected to a driver and an amplifier. According to v... | 09/06/2005 |
| 6907234 | System and method for automatically tuning an antenna An apparatus and method is related to a wireless system with an antenna that is automatically tuned to a desired frequency. The antenna is coupled to an adjustable tuning circuit to form a tuned antenna circuit that has a resonant frequency. The adjustable tuning ci... | 06/14/2005 |
| 6636728 | Portable multi-antenna signal receiver A portable receiver comprised of several antennas that are connected to a receiver unit for receiving a signal transmitted by an electromagnetic induction process. The antennas are made in the form of coils, that are carried by a support in such a way tha... | 10/21/2003 |
| 6366250 | Wrist mounted wireless instrument and antenna apparatus A wrist mounted wireless instrument is provided with a wrist strap containing an antenna therein. An electrically conductive shield is disposed in the wrist strap between the antenna and the wrist to shield the antenna from the effects of the body of the ... | 04/02/2002 |
| 6175729 | Wrist band with embedded antenna A wrist band for a device main body containing communication circuits, having a first wrist band at least partially covering a first antenna plate, a second wrist band at least partially covering a second antenna plate, and a clasp device including a cont... | 01/16/2001 |
| 5548815 | Inductive radio communication system An inductive radio communication system in which two sets of parallel lines are provided so as to be separated from each other at a predetermined distance therebetween along the track of a mobile unit, and a loop antenna having a double loop structure and... | 08/20/1996 |
| 5469178 | Low profile antenna system for a cardlike communication receiver A low profile antenna system comprises a frame having front and side surfaces for enclosing a printed circuit board supporting a receiver, the front surface of the frame including a first conductive plate, an isolated portion thereof, which couples to the... | 11/21/1995 |
| 5408699 | Portable radio equipment having a display A structure of a loop antenna installed in a portable radio device having a display prevents the gain of the antenna from being lowered despite the fact that a conductive support member or frame, which fixes the display in place, is located in close proxi... | 04/18/1995 |
| 5303421 | Method and apparatus for coupling straps of a wrist worn device A selective call receiver (100) including a receiver (102) for receiving messages and a housing (104) for housing the receiver (102). A clasp (200) for securing first and second wrist straps (112, 114) including a base member (202) and a pair of sides (20... | 04/12/1994 |
| 5280645 | Adjustable wristband loop antenna A wristworn receiving device suitable for being worn about a wrist comprises a receiver (404) for receiving radio frequency signals on a particular operating frequency, a housing (142) for enclosing the receiver (404), a first wristband section (102) incl... | 01/18/1994 |
| 5134724 | Wrist band for wrist-mounted radio with an uninsulated buckle A wrist band for a wrist-mounted radio system is provided wherein a metallic wrist-band buckle need not be insulated. The system includes a radio receiver which includes a differential input in a wrist-band antenna with a "null point" at the location of t... | 07/28/1992 |
| 4977614 | Wristband with loop antenna An apparatus for adjusting the length of a single segment loop antenna while automatically compensating for the antenna so as to maintain a substantially constant resonant frequency thereof.... | 12/11/1990 |
| 4790030 | Tuner with insertable antenna coupler Antenna coupling components including a coil and a static discharge resistor are mounted on a separate printed circuit board within a tuner that is positioned by means of projecting tabs on each end so as to self-center the coil with the inductor. A first... | 12/06/1988 |
| 4686708 | Antenna circuit An antenna circuit includes a ferrite core around which a main coil and a negative feedback coil are wound, and a field effect transistor (FET) with its source grounded, and with a voltage induced in the main coil being applied across the gate and the sou... | 08/11/1987 |
| 4442434 | Antenna circuit of the negative impedance type An aerial circuit comprises a first antenna in connection with an impedance, which is a "negative impedance", whereby a broad frequency range is achieved. The "negative impedance" is based on a second antenna similar to the first antenna, whereby the resu... | 04/10/1984 |
| 4342999 | Loop antenna arrangements for inclusion in a television receiver A single-turn loop antenna suitable for inclusion within the cabinet of a television receiver has at least one gap forming a pair of feed terminals. Circuitry connects to the feed terminals for tuning the antenna over at least a portion of the television ... | 08/03/1982 |
| 4278980 | Antenna input circuit for radio receiver A low-impedance loop antenna for receiving medium-frequency-band radio waves has an inductance of 1 microhenry up to 100 microhenries and an effective loop area larger than 20 cm2, whereby it is capable of receiving radio waves with a markedly ... | 07/14/1981 |
| 4025856 | Antenna apparatus An omnidirectional antenna apparatus for processing received FM stereophonic radio signals to substantially eliminate multipath distortion in the stereophonic sound reproduced by a radio receiver coupled thereto.... | 05/24/1977 |
| 4016553 | Article detection system with near field electromagnetic wave control An electronic theft detection system includes antenna clusters connected to electromagnetic wave transmitter and receiver means. Each antenna cluster comprises a group of spaced apart parallel loops connected in phase opposition or bucking relationship. E... | 04/05/1977 |
