Matches 151 - 200 out of 248 < 1 2 3 4 5 >
Match Document Document Title
6160525 Low impedance loop antennas  
Low impedance loop antennas utilize a loop separated into a plurality of radiating segments fed in parallel. A four point feed loop antenna, including radiating segments 12, 13, 14, 15 had a...
6150952 System with a lock and a key which cooperate according to the transponder principle, as well as a key and a lock for such a system  
A key and lock system has a key with an integrated transponder coil that is connected to a transponder unit, and a lock with an integrated write/read coil. The key has a key bit portion and a bow...
6147659 Tire with transponder and transponder for tire  
The present invention relates to a reliable transponder 3 for a tire and a reliable transponder-provided tire which are not broken while the tire runs or the tire is formed or cured, by using...
6147655 Flat loop antenna in a single plane for use in radio frequency identification tags  
A flat compact loop pattern provides an antenna for radio frequency identification tags with an enhanced voltage and/or current across two closely adjacently spaced terminals which are disposed on...
6144346 Antenna arrangement  
An antenna arrangement which is used for transmitting and receiving radio signals includes a capacitively tunable loop, from which received radio signals can be coupled symmetrically into a...
6137445 Antenna apparatus for mobile terminal  
An antenna apparatus for a mobile terminal is provided having a hula hoop antenna secured to a housing of the mobile terminal; a conductive line coupling the hula hoop antenna to a transceiver of...
6118411 Loop antenna and antenna holder therefor  
A closed loop is formed by loop antenna elements which equivalently function as inductance, a capacitor inserted in such a manner as to divide the loop antenna into the loop antenna elements, and...
6118367 Data carrier system  
A data carrier system is provided including: a main apparatus including a first control unit for outputting a first signal and a first coil unit having at least a transmission coil for transmitting...
6115001 Antenna device  
An earth configuration achieving easy installment without deteriorating performance of an antenna device. The antenna device has a balanced antenna element, a shield plate arranged between the...
6107921 Conveyor bed with openings for capacitive coupled readers  
Identification tags are secured to parcels moving upon a conveyor belt. The identification tags each contain a transponder circuit in electrical communication with a transponder antenna. The...
6104354 Radio apparatus  
A small radio apparatus such as a pager has a printed circuit loop antenna(12) comprising a generally elongate loop formed by first and second electrical conductors(22,24) interconnected by first...
6094177 Planar radiation antenna elements and omni directional antenna using such antenna elements  
An antenna of the long frame-type wherein the ratio between the long side and the short side is between 1:4 and 1:8 and the length of the long side is equivalent to one wavelength of the central...
6094173 Method and apparatus for detecting an RFID tag signal  
An antenna array for detecting a coded radio frequency identification (RFID) tag signal generated by a tag during passage of the tag through a detection volume, or portal. The array comprises at...
6067052 Loop antenna configuration for printed wire board applications  
A loop antenna includes a dielectric substrate, and an antenna conductor forming a loop that extends over a surface of the substrate. A matching circuit near the conductor is dimensioned and...
6043792 Single antenna arrangement providing interrogation field  
An antenna arrangement includes a passageway having at least one side and an antenna located in a substantially vertical plane of the side. The antenna has one or more coils, each having a corner...
6034651 Antenna coil with reduced electrical field  
An antenna coil with low electrical field emissions comprises a flat winding with a specified shape and a conductive screen facing the winding. The conductive screen has substantially the same...
6028559 Loop antenna  
A first loop antenna apparatus is disclosed which includes an open loop antenna portion and an inductor having a predetermined inductance and first and second ends connected to first and second...
6025784 Vehicles, license plate frame assemblies, methods of forming license plate frames, and methods of attaching RFIDs, transponders and modulators to vehicles  
The invention encompasses license plate frame assemblies having modulators, transponders or radio frequency identification devices (RFIDs) incorporated therein. Further, the invention encompasses...
6016128 GPS wave antenna apparatus  
A GPS wave antenna apparatus according to the present invention includes a substrate unit having a printed board on which an antenna constituting element including a GPS wave antenna element is...
6011519 Dipole antenna configuration for mobile terminal  
The present invention provides an internal antenna for mobile terminals that provides performance comparable with externally mounted antennas. The antenna is of a looped dipole configuration...
6008761 Loop antenna  
A loop antenna for a portable, compact radio device, which has a high gain and a high strength according to this invention, is realized such that side surfaces of the loop antenna are inclined or...
5995054 Communications device  
A communications device comprises a loop antenna having a plurality of feed terminals defining at least two terminal pairs. A controller is provided for selecting one terminal pair to enable...
5986566 Wrist band antenna  
A wrist band antenna prevents connection failure and/or breakdown due to attachment/detachment of a loop antenna and has a receivable frequency band which is not affected by the thickness of the...
5977921 Circular-polarization two-way antenna  
An antenna for transmitting and receiving circularly polarized electromagnetic radiation which is configurable to either right-hand or left-had circular polarization. The antenna has a conductive...
5966100 Quadruple-delta antenna structure  
An antenna element is disclosed that is a set of approximately coplanar conductors that form four approximately triangular conductors, each of which has a perimeter of approximately one wavelength....
5963177 Methods of enhancing electronmagnetic radiation properties of encapsulated circuit, and related devices  
Methods of forming electronic signal transmitting/receiving devices and electronic signal transmitting/receiving devices are described. In one implementation, integrated circuitry including...
5952978 Contrawound toroidal antenna  
An electrically small antenna is disclosed that is constructed from a generalized contrawound toroidal helix made from a single continuous conductor divided into two length portions each of which...
5949384 Antenna apparatus  
An antenna apparatus for receiving an electric wave, includes an antenna element for receiving an electric wave made from an elastic linear body of a loop shape which can be collapsed into a...
5943022 Portable communication device including loop antenna  
A portable communication device is described comprising a loop antenna. The loop antenna consists of a dielectric strip with overlapping conductive plates on both sides, so that capacitors are...
5929825 Folded spiral antenna for a portable radio transceiver and method of forming same  
A spiral antenna (100) having a feed-point end and a termination end for use within a portable two-way radio housing includes a ground substrate (102) and a number of spiral elements (103, 105)...
5929760 RFID conveyor antenna  
An RFID antenna system is described comprising an elongated antenna disposed proximate an interrogation path for interrogating transponders moving along the interrogation path. The antenna is...
5926144 Wearable electronic device and antenna therefor  
An internal antenna (302) for a wearable electronic device (1000) includes first and second elongated conductor segments (416, 418) which are fabricated in a form of an arc to conform substantially...
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...
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...
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...
Matches 151 - 200 out of 248 < 1 2 3 4 5 >