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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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,...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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.
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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4679052 |
Automobile antenna device
An automobile antenna device in which broadcasted waves received by the automobile body is efficiently detected so that the various kinds of receivers equipped with the automobile can be supplied...
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4445123 |
Method for establishing a vertical E-field antenna installation
A method of establishing an ELF/VLF, vertical E-field transmitter loop antenna installation. The method comprises the steps of ascertaining a land region having contiguous areas of widely differing...
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4290070 |
Magnetic loop antenna with diamagnetic properties
An antenna including a first elongated magnetic member having at least one diamagnetic portion and a first magnetic pole orientation, a second elongated magnetic member having at least one...
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3673334 |
ANTENNA FOR USE WITH AN AUDIO INDUCTION COMMUNICATION SYSTEM
An antenna for use with an audio induction communication system provides a communication field of substantially uniform strength at all points within a given pick-up zone along which...
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3573832 |
UHF TELEVISION ANTENNA
A UHF television band antenna includes two or more conductive loops, at least one of which is broken and is provided with terminals adapted for connection to a television receiver. One of the loops...
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3550136 |
SEMI-HELICAL ANTENNA
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3514780 |
CIRCULARLY POLARIZED LOOP V ANTENNA
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3228030 |
Shielded antenna
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3216016 |
Buried inner and outer loop conductors forming annulus producing radiation in plane of annulus
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3210766 |
Slot type antenna with tuning circuit
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3154786 |
Luggage rack antenna with opposite feed points
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3122747 |
Multi-turn loop antenna with helical twist to increase the signal-to-noise ratio
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3096518 |
Loop antenna with impedance matching
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3011051 |
Means for the generation and transmission of very large pulses of radio frequency waves
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2971191 |
Slot type antenna having an autotransformer coupling circuit
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2950479 |
Loop antenna utilizing conductive cabinet
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2878473 |
Television antenna
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2863147 |
Radio antenna
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2825061 |
Wave radiator
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2817838 |
Indoor television antennas
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0932913 |
Title is not available
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D160016 |
Title is not available
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D066902 |
Title is not available
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3560983 |
Title is not available
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