Matches 101 - 150 out of 257 < 1 2 3 4 5 6 >
Match Document Document Title
6441622 Method and apparatus for time domain reflectometry moisture sensing in various media  
A method and apparatus for time domain reflectometry sensing of moisture in a test material. The sensor ( 200 ) having a generally helical shaped electrode ( 206 ) and at least one secondary...
6400330 Bar antenna and method of manufacturing the same  
A bar antenna includes a single body ferromagnetic substance core, a bobbin which accommodates the core in a hollow space and has a plurality of coil windings, a case in which is positioned the...
6396455 Antenna with reduced magnetic far field for EAS marker activation and deactivation  
An EAS activation/deactivation antenna in accordance with the invention comprises a core; a coil arrangement having at least two coils spirally wrapped about the core, the first coil having a first...
6396454 Radio unit for computer systems  
A radio unit for computer systems for receiving and/or presenting data information transmitted within a commercial broadcast band and methods of manufacturing and using the same. The radio unit...
6249259 Downhole magnetic dipole antenna  
A downhole magnetic hollow core dipole antenna has a high permeability material magnetic core composed of laminated sections placed around a section of drill pipe and running substantially along...
6249258 Transponder arrangement  
The invention concerns a transponder arrangement in which the transponder is disposed on a conductive surface. According to the invention, the coils forming the transponder antenna are aligned at a...
6243045 Removal data storing medium having loop antenna  
An antenna device including a loop antenna main body having a predetermined aperture area, and a conductor element insulated from the loop antenna main body, connected to a ground potential, and...
6232931 Opto-electronically controlled frequency selective surface  
An optically controlled frequency selective surface (FSS) includes an electrically conductive layer having an array of radio frequency scattering elements such as slots formed in an electrically...
6215455 Armored magnetic field antenna in printed circuit  
A shielded magnetic-field antenna has at least one turn of a metallic element and metallic tubular shielding positioned around the element. The turn (3a) is produced in a printed circuit on a card...
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...
6163305 Loop antenna device  
A loop antenna has a first antenna generating a first magnetic field and a second antenna generating a second magnetic field such that the first magnetic field and the second magnetic field each...
6107974 Apparatus and method of generating an RF field  
An RF antenna includes an input terminal for receiving an RF signal, a supporting element, an electrically conductive coil on the supporting element and disposed to receive the RF signal from the...
6067235 Process and a device for the production of a transponder unit and a transponder unit  
6061030 Aerial arrays for magnetic induction communication systems having limited power supplies  
Communication systems requiring a user to wear a headset or body pack preferably include small aerials that use ferrite cores to achieve transmission efficiency. Driving such aerials typically...
6052097 Antenna circuit and method for collar-mounted remote animal training system  
An improved antenna system for a collar-mounted receiver-stimulator unit of an electronic animal training apparatus includes a conductive antenna mounting connector for detachable connection of an...
6014111 Ferrite crossed-loop antenna of optimal geometry and construction and method of forming same  
A novel loop antenna containing a thin-walled ferrite box or other hollow; magnetic core structure of high permeability (considerably greater than 100), particularly useful for crossed loop...
5977927 Chip antenna  
A chip antenna in which correct evaluation and inspection of a conductor can be performed regardless of the state of grounding. The chip antenna has a rectangular-prism-shaped substrate formed of a...
5933120 2-D scanning antenna and method for the utilization thereof  
Systems and methods for two dimensional millimeter wave imaging are described. A system includes a spindle assembly defining a rotation axis; a waveguide assembly connected to the spindle assembly,...
5933117 Flexible ferrite loaded loop antenna assembly  
A buoyant loop antenna, deployable along a cable, includes a core region prising a plurality of annular ferrite beads. These annular shaped beads include a center hole and generally concave first...
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...
5916476 Oxide magnetic materials, making method, antenna coils, and inductance elements  
To an oxide magnetic material consisting essentially of, calculated as oxides, 15-30 mol % of Fe 2 O 3 , 6-12 mol % of CuO, and 58-79 mol % of NiO as main ingredients, 1.5-4.5% by weight of PbO,...
5903242 Helical antenna and method of making same  
A helical antenna is provided in which a predetermined resonance frequency can be determined at the design stage. The helical antenna includes a conductor which is formed from copper or a copper...
5889496 Consolidated system of antennas  
A system of antennas for conserving space and concealing the separate identity of the individual antennas. The antennas may be a radio antenna and a telecommunications antenna. The antennas may...
5864323 Ring antennas for resonant circuits  
A ring antenna (10) for resonant circuits for identifying metallic containers has an annular core (11) having at least one core surface (11a') corresponding to at least one surface of the container...
5818173 Cylindrical antenna having means for generating a magnetic field in a vicinity of the antenna  
The invention relates to a microwave antenna having at least one tubular portion with a central axis, and magnets which are located within the tubular portion along the central axis. The magnets...
5768813 Carrier for an electronic identification device  
A carrier (10) for an electronic identification device which permits the electronic device to be attached to an object to be identified. The electronic device is integrally moulded into the carrier...
5767628 Helicon plasma processing tool utilizing a ferromagnetic induction coil with an internal cooling channel  
Disclosed is a plasma dry processing apparatus for producing a plasma with a resonance zone including a chamber for plasma processing at least one workpiece, the workpiece situated at a first end...
5767816 Ferrite core marker  
A passive electronic marker uses a plurality of ferrite cores to increase locating range, and the cores are attached in such a manner that a slight bend of the marker at a junction between the...
5727408 Signal processing device with magnetism antenna and key device with the signal processing device  
A key device includes a signal processing device for generating a signal containing specific information, a key plate having a stem and fitting device for fitting the signal processing device and...
5696518 Antenna device integrally fixed to portable electronic appliance  
An antenna device used for portable electronic appliances such as electronic wristwatches furnished with a reception function. Antenna device 100 is bent conforming to the side of watch case 201...
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...
5691731 Closed slot antenna having outer and inner magnetic loops  
An RF identification system having an interrogator operable to send RF interrogations to a transponder and to receive RF responses from the transponder. The interrogator is in electrical...
5638080 Manufacture of a flexible antenna, with or without an inner permeable magnetic layer  
An HF antenna comprising a sheet-like, flexible multipart magnet core (16) manufactured of ferromagnetic material is provided with an antenna winding which is made up of a plurality of turns and...
5633649 Radar system and components therefore for transmitting an electromagnetic signal underwater  
An antenna for transmitting electromagnetic signals having a frequency less than 500 Hz includes a beam of dielectric material and a conductive sheet wound in a helical pattern around the beam of...
5633648 RF current-sensing coupled antenna device  
An apparatus for, and method of, replacing conventional antennas which intercept radio frequency fields and develop electrical signals for input to an RF receiver. The invention eliminates the use...
5625366 Flat flexible antenna  
Apparatus and method for producing a flexible antenna suitable to be incorporated in a badge or similar object. The antenna comprises electrical windings (28, 38) surrounding a flexible antenna...
5625370 Identification system antenna with impedance transformer  
The present invention discloses an electromagnetic device which includes a magnetic flux producing apparatus for producing a magnetic flux path loop. The magnetic flux producing apparatus...
5621199 RFID reader  
A compact rf reader apparatus integrated into a single compact package structure. In one embodiment, a rotatably adjustable head is mounted on the compact reader body portion containing read/write...
5568162 GPS navigation and differential-correction beacon antenna combination  
An antenna system comprises a stack of elements that include a GPS patch antenna on a groundplane with an associated low-noise amplifier (LNA), a first Faraday shield of flat ribbon cable covering...
5567537 Magnetic core element for antenna, thin-film antenna, and card equipped with thin-film antenna  
A magnetic core element for use in a thin antenna. The magnetic core element has a thickness of 25 μm or less and is made of a particular amorphous alloy strip or a particular nano-crystalline...
5561438 Ferrite Antenna  
A ferrite antenna is disclosed. The antenna includes a board on which a ferrite component is mounted. The board includes a plurality of slots and a conductive pattern extending between two of the...
5530358 Method and apparatus for measurement-while-drilling utilizing improved antennas  
A method and apparatus is provided for measurement-while-drilling utilizing improved antennas. An elongated tubular member is provided with an outer peripheral surface having a contoured portion...
5521609 Magnetic antenna using metallic glass  
A lightweight search-coil antenna or sensor assembly for detecting magnetic fields and including a multi-turn electromagnetic induction coil wound on a spool type coil form through which is...
5495259 Compact parametric antenna  
A compact parametric antenna (CPA) employs the principle of stimulating an electric field E and a magnetic field H for synthesis of an electromagnetic wavefront according to the Poynting vector...
5434584 Submarine communications system  
A low frequency submarine communication system which utilizes the submarine ody as part of the antenna. The antenna is coiled around the submarine hull and utilizes the hull as the core for low...
5408243 Method for producing a flat flexible antenna  
Apparatus and method for producing a flexible antenna suitable to be incorporated in a badge or similar object. The antenna comprises electrical windings (28, 38) surrounding a flexible antenna...
5373303 Built-in chip transponder with antenna coil  
An antenna circuit to be used in conjunction with a chip transponder such that the antenna circuit serves for both the reception of interrogative signals intended for the transponder as well as for...
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...
5305002 Hinged read-out antenna system  
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...
5223851 Apparatus for facilitating interconnection of antenna lead wires to an integrated circuit and encapsulating the assembly to form an improved miniature transponder device  
A method and apparatus for facilitating interconnection of antenna lead wires to an integrated circuit and encapsulating the assembly to form an improved miniature transponder device including the...
Matches 101 - 150 out of 257 < 1 2 3 4 5 6 >