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| Number | Title | Issue Date |
| 7358848 | Wireless remote sensor An integrated circuit implements a wireless remote sensor. The wireless remote sensor includes an antenna coupled to an energy distribution unit to allow passive collection of electrical charge. A signal processing unit couples to the energy distribution unit and mo... | 04/15/2008 |
| 7313409 | Method and apparatus for transmit power control during beam switching A method and apparatus for transmit power control (TPC) while switching a beam among a plurality of beams in a wireless communication system. An antenna array generates a plurality of directional beams and preferably an omni-directional pattern and switches a beam a... | 12/25/2007 |
| 7308286 | Multi-dimensional joint searcher and channel estimators A wireless communication receiver (20) comprises an antenna structure (22) and a joint searcher and channel estimator (24). The antenna structure acquires dimensionally differentiated signals which are concurrently utilized by the joint searcher... | 12/11/2007 |
| 7292831 | Radio communicate method and system A transmitter 1 transmits from a transmission antenna 7 a mixture signal containing a radio-frequency (RF)-band modulated signal, and a portion of power of a local oscillation signal used for frequency conversion. Meanwhile, a receiver 8 detects... | 11/06/2007 |
| 7260424 | Dynamically configured antenna for multiple frequencies and bandwidths A wireless communication device includes a reconfigurable antenna and one or more wireless transceivers coupled to the antenna. The reconfigurable antenna can be dynamically configured to transmit and receive wireless signals at a plurality of frequencies and bandwi... | 08/21/2007 |
| 7218277 | Antenna failure detection The present invention provides an apparatus, method, and computer-executable program for detecting antenna failures in directional antennas. In particular, the present invention compares a bearing calculated from received positional data concerning a target to the b... | 05/15/2007 |
| 7155267 | Apparatus and method for monitoring antenna state of mobile station An apparatus and method are provided for monitoring an antenna state of a mobile station. A resister may be provided between a battery voltage terminal and a power source voltage terminal of a power amplifier. A voltage level corresponding to a dropped amount of a v... | 12/26/2006 |
| 7138952 | Array antenna with dual polarization and method According to one embodiment of the invention, an array antenna includes a substrate body, a first antenna element, and a second antenna element. The first antenna element is coupled to the substrate body and is operable to transmit or receive a first signal. The sec... | 11/21/2006 |
| 7129897 | Array antenna apparatus capable of switching direction attaining low gain An array antenna apparatus includes a dielectric substrate, a feeder element, a parasitic element, and a directivity control unit. The feeder element and the parasitic element have an equal length. The feeder element and the parasitic element are arranged such that ... | 10/31/2006 |
| 6999022 | Surveillance system A surveillance system for an aircraft includes a first antenna comprising a four radiating element antenna. The first antenna is configured for electrical coupling to a first air traffic control transponder and a first traffic alert and collision avoidance system, a... | 02/14/2006 |
| 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 |
| 6950074 | Noncontact type IC card The present invention relates to an electronic device that suppresses reduction in reception sensitivity and occurrence of distortion when IC cards are used while stacked. A loop antenna equipped on the IC card has up to four turns, and is designed so that one turn,... | 09/27/2005 |
| 6946958 | Contactless data storage medium A contactless data storage medium has at least two antennas, in each case for different transmission bands. This makes it possible to configure a data storage medium such that it can be operated with read/write units that operate in accordance with different standar... | 09/20/2005 |
| 6882317 | Dual antenna and radio device An arrangement for enhancing electrical isolation between antennas in antenna structures comprising at least two antennas, and a radio device applying the arrangement. The interfering antenna comprises components causing substantial degradation in radiation characte... | 04/19/2005 |
| 6771224 | Direction finding system using body-worn antenna Body-worn antennas operate in combination with a direction finding processor to be able to detect the presence of electromagnetic radiation involved in communication as well as the direction of the source of the electromagnetic radiation. In one embodiment, a number... | 08/03/2004 |
| 6580398 | Low profile antenna The invention is a low profile antenna array, particularly beneficial for AM broadcasting stations, which dramatically reduces the height of the antenna. The antenna array is constructed of at least two conductors oriented horizontally or sloping slightly... | 06/17/2003 |
| 6459588 | Noncontact IC card and fabrication method thereof A noncontact IC card is provided with a card substrate 11, an IC chip 12 disposed on the card substrate 11, and a antenna circuit 13 formed on the card substrate 11 and having a pair of antenna terminals 13a and 13b, where one antenna terminal 13a is conn... | 10/01/2002 |
| 6429828 | VHF/UHF self-tuning planar antenna system A wide-band self-tuning antenna system for the reception of VHF/UHF signals includes planar antenna elements located on both the surfaces of a printed circuit board and a tuner unit which includes a plurality of matching networks for the respective plural... | 08/06/2002 |
| 6201511 | Composite antenna for duplexer-free duplex operation terminals and method An antenna assembly includes a receiving antenna and a separate transmitting antenna with an isolation circuit disposed in between to thereby isolate the Tx and Rx signals and provide a sufficient amount of attenuation outside the desired frequency band. ... | 03/13/2001 |
| 5797084 | Radio communication equipment 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. The inventive radio communication unit comprises a first chip antenna contained with... | 08/18/1998 |
| 5767812 | High efficiency, broadband, trapped antenna system The invention provides an efficient, broadband, antenna system for RF communications. The benefits of the invention include: a single integrated system for total band coverage; high system efficiency across the operating band; multiple instantaneous trans... | 06/16/1998 |
| 5708833 | Antenna cap, antenna connectors and telephone line connectors for computer devices utilizing radio and modem cards A computer apparatus for receiving a removable communication card such as a radio card or a modem card. A radio or modem is serf-contained inside a housing of the communication card and has an electrical interface for communicating information to and from... | 01/13/1998 |
| 5191349 | Apparatus and method for an amplitude monopulse directional antenna A directional antenna suitable for use with the transmission and reception of information related to the traffic alert and collision avoidance systems (TCAS) of a monitoring aircraft is disclosed. The directional antenna includes four monopole antennas po... | 03/02/1993 |
| 4750000 | Ultra-broadband impedance matched electrically small self-complementary signal radiating structures with impedance-inverting feed for complementary pairs using thin wire elements Ultra-broadband impedance matched electrically small self-complementary pair antennas using thin wire elements with impedance inverting feed are presented. Efficiencies are determined by achieveable loss resistances in the radiating structure itself, rath... | 06/07/1988 |
