Matches 201 - 250 out of 290 < 1 2 3 4 5 6 >
Match Document Document Title
5926128 Radar systems  
A target tracking radar system for a guided missile wherein sum and difference signals from a reception antenna are multiplexed at a variable rate into a single channel receiver, the multiplexing...
5923300 Multi-phase transmitter with single receive antenna for transponder interrogator  
An antenna includes a transmitter including a first transmit coil wound in a first direction. A second transmit coil is electrically coupled to the first transmitter and wound in a second direction...
5914697 Method of fabricating radio device helical antennas  
A portable radio device helical antenna 1 is fabricated by a method wherein the cutting boss component 6 of a molded element 7, that has a spirally cut groove 4 formed around an insulator and that...
5907522 Portable device for receiving and/or transmitting radio-transmitted messages comprising an inductive capacitive antenna  
Portable device for receiving and/or transmitting radio-transmitted messages comprising: a case (11; 42; 51), an antenna (12; 31, 32; 52, 53) capable of picking up both a magnetic component...
5905467 Antenna diversity in wireless communication terminals  
A wireless communication terminal comprises a first housing section including an antenna for enabling wireless communications with the terminal and a second housing section including a second...
5847683 Transmission line antenna and utility meter using same  
A transmission line antenna (10) comprises first and second ends (14 & 16). Each end has a mounting portion defining a mounting height and an overlapping portion (18 & 20) defining an overlapping...
5838283 Loop antenna for radiating circularly polarized waves  
A loop antenna for a circularly polarized wave can operate in a wide frequency range and can be simply constructed. A radiating power fed to a feeding point via a coaxial line and a feeder...
5825335 Sheet antenna apparatus  
A sheet antenna apparatus capable of favorably receiving vertically polarized electromagnetic waves is provided which includes an antenna element 11 comprising a main antenna portion 15 having a...
5808558 Remote universal send/receive utility usage data gathering system  
A universal utility usage data gathering system that is capable of operating with any other remote data gathering system, regardless of protocol, such as a standard Supervisory Control And Data...
5805114 Expanded quadruple-delta antenna structure  
An antenna structure is disclosed that is a set of approximately coplanar conductors which form four approximately triangular conductors. Three parallel conductors are the central part and the two...
5767813 Efficient electrically small loop antenna with a planar base element  
An efficient electrically small loop antenna includes a radiation device, an impedance matching network, and a connector that interfaces to associated electronic circuitry. The radiation device...
5760747 Energy diversity antenna  
An energy diversity antenna (100) includes a first antenna (103) and second antenna (113) positioned on a substrate (101). The first antenna is preferably a loop used for receiving radio frequency...
5751255 Electrically small receiving antennas  
A small loop antenna employs circuits for increasing the power output and bandwidth of such antennas by employing coaxial cable or wide antenna elements on which the coaxial cable may be mounted or...
5734353 Contrawound toroidal helical antenna  
An electrically small antenna is constructed from a generalized contrawound toroidal helix made from a single continuous conductor divided into two length portions each of which are substantially...
5714965 Active reception antenna with coplanar feeder  
An active reception antenna with a coplanar waveguide having a high actual gain in the frequency band as broad as 100% or larger of the central frequency. The reception active antenna with a...
5694139 Short-distance communication antenna and methods of manufacturing and using the short-distance communication antenna  
A short-distance communication antenna can satisfactorily transmit and receive an information signal within a regulation range of the radio law. Also, the short-distance communication antenna...
5673054 Antenna and miniature portable wireless transceiver  
A loop antenna device of the invention, when incorporated in a transceiver, stably a high level of sensitivity without being substantially influenced by the body, regardless of the posture or...
5654723 Contrawound antenna  
An antenna is disclosed that has windings that are contrawound in segments on a toroid form and that have opposed currents on selected segments. An antenna is disclosed that has one or more...
5627552 Antenna structure for use in a timepiece  
Antenna structure for use with a timepiece (100) adapted to be worn on the wrist and including a microreceiver (117,118), said antenna structure comprising an antenna (81) comprising at least one...
5598032 Hybrid chip card capable of both contact and contact-free operation and having antenna contacts situated in a cavity for an electronic module  
A contact-free card and a method for the manufacture of such a card. The card comprises a card body, an electronic module having an integrated chip card and two contact zones, and an antenna...
5589840 Wrist-type wireless instrument and antenna apparatus  
A wrist-type wireless instrument equipped with an antenna body that is formed on a wrist band is disclosed. The wireless instrument provides a simple compact arrangement within the wireless...
5585811 Antenna device for electronic product anti-theft systems  
The antenna device has an antenna wire (1), a screening plate (2) and a casing receiving the antenna wire (1) and the screening plate. (2) and which is assembled from a front part (3) and a rear...
5583523 Planar microwave tranceiver employing shared-ground-plane antenna  
A preferred embodiment of an antenna for radiating and collecting electromagnetic radiation includes a substantially planar conductive member having a first side and a second side. A strip...
5526006 Electronic device wristband  
A wrist mounted electronic device, including a loop antenna embedded within a single-injection molded, multiple-segment wristband, has an electrically conductive, obtusely angled mounting bracket...
5485166 Efficient electrically small loop antenna with a planar base element  
An efficient electrically small loop antenna includes a radiation device, an impedance matching network, and a connector that interfaces to associated electronic circuitry. The radiation device...
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...
5451965 Flexible antenna for a personal communications device  
An antenna for a portable radiotelephone which is configured in consideration of the nature of the electromagnetic wave and of the antenna-user relation in order to improve antenna performance in...
5442369 Toroidal antenna  
An antenna has windings that are contrawound in segments on a toroid form and that have opposed currents on selected segments. The windings may have a helical pattern, poloidal peripheral pattern...
5406297 Inventory management system  
An inventory management system which includes a transponder, an interrogation transceiver and control devices utilized therewith. The control devices operate to minimize the power consumption of...
5371509 Planar microwave transceiver employing shared-ground-plane antenna  
A microwave intrusion detection system having a transceiver positioned to one side of a substantially conductive member and an antenna positioned on the other side of the conductive member. The...
5319354 Antenna structure for communicating with an electronic tag implanted in a pneumatic tire  
The identification of pneumatic tires by electromagnetic coupling with a nsponder embedded in the thickness of the pneumatic tire is made possible by a suitable interrogation antenna so that,...
5307081 Radiator for slowly varying electromagnetic waves  
A radiator useful for radiating pulses with a duration of about 10 ms is disclosed. Such pulses occupy the frequency band from zero to a few hundred Hertz. For a given time variation of an...
5274392 Tilted antenna  
A novel antenna system disposed around a conveyor belt for the interrogation of objects passing through the antenna which overcomes centralized dead zone problems is disclosed. A frame antenna is...
5206657 Printed circuit radio frequency antenna  
A radio frequency antenna comprises a pair of double-sided printed circuit boards that are etched on each side to form conductive loops around the periphery of each board. The circuit boards are...
5182568 Loss cancellation element for an integral antenna receiver  
An antenna system for a communication receiver comprising a first circuit portion located on a first circuit substrate, and a second circuit portion located on a second circuit substrate comprises...
5039996 Method of placing an electronic responder in or near an electrically conductive article, as well as an electrically conductive article provided with an electronic responder  
A method of placing an electronic responder of an electromagnetic interrogation system or an antenna coil of an electromagnetic interrogator device in or near an electrically conductive article. An...
5017932 Miniature antenna  
A miniature antenna, in which a pair of square conductor plates disposed in parallel with a spacing sufficiently smaller than the wavelength used are fixed to each other to an insulating frame to...
4992799 Adaptable antenna  
An antenna with a first and second portions (16 and 18) that are rotatably movable with respect to each other. The antenna may be rotated from a first position to a second position and from the...
4983985 Cellular antenna  
A cellular antenna including a matching transformer section connected to a substantially rectangular member of braid. An off-center feed provides for an omni-polar radiation.
4963880 Coplanar single-coil dual function transmit and receive antenna for proximate surveillance system  
A coplanar antenna system having a single-coil loop antenna provides both transmit and receive functions. The antenna operates in a tuned mode during transmitting and an untuned mode during...
4899039 Photodetector array for soft hat mounting using a loop antenna  
A photodetector array which mounts to a soft hat, such as a military fatigue hat, and which includes circumferentially spaced and outwardly facing photodetectors on radial arms extending from a...
4862181 Miniature integral antenna-radio apparatus  
An integral portable receiver/antenna system is provided which includes an isolation coupler element exhibiting a geometry which is substantially closed upon itself and which is situated between...
4823141 Vehicle antenna system  
The present invention provides a vehicle antenna system for detecting broadcast waves received by the vehicle body and then transmitting detected signals to various onboard receivers. The vehicle...
4816837 Automobile antenna system  
An automobile antenna disclosed is built in within a vehicle body without any externally protruding portion. It includes an electromagnetic coupling type high-frequency pickup, which has a loop...
4806943 Set of transmit/receive antennas situated at a fixed station for a two-way radio link with a vehicle  
In a fixed station for a two-way radio link with a vehicle (5) which has a self-contained transmit/receive device (6) including a transmit antenna (8) in the form of a vertical axis coil so as to...
4804965 Flat wide-band antenna  
An antenna for receiving or transmitting electromagnetic waves with circular polarization or, in certain configurations, linear polarization. The antenna element is low-cost, wide-band and...
4789866 Automobile antenna system  
The present invention provides an automobile antenna system including a high-frequency pick-up device for receiving broadcast waves and which includes a loop antenna or detection electrode element...
4785303 Omnidirectional dipole loop antenna array  
An omni-directional aerial, more especially for the reception of domestic television programs in the U.H.F. band, comprises four folded dipole elements (1-4), each formed as a self-supporting...
4754284 Automobile antenna system  
An automobile antenna system includes a loop antenna disposed along a marginal edge portion of the vehicle body of an automobile for detecting broadcast waves flowing on the vehicle body. A...
4717922 Automobile antenna system  
The present invention provides an autombile antenna system for detecting surface currents induced on the vehicle body by radio waves. The antenna system includes an electrostatic shielding case...
Matches 201 - 250 out of 290 < 1 2 3 4 5 6 >