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| Number | Title | Issue Date |
| 7876277 | Adjustable antenna coil An antenna coil formed on a substrate surface of an insulating substrate has conductor lines forming four sides of a basic loop shape. Furthermore, the antenna coil has corner lines at a corner portion of the loop. For example, by forming trimming lines on the inner... | 01/25/2011 |
| 7812774 | Active tuned loop-coupled antenna An active tuned loop-coupled antenna capable of optimizing performance over incremental bandwidths and capable of tuning over a large total bandwidth to be used in wireless communications. The active loop is capable of serving as the radiating element or a radiating... | 10/12/2010 |
| 7358965 | Tapping to create writing The present invention provides a method and system for tapping to create document structure, such as writing. A tapping gesture received from the user is interpreted by a writing application to indicate that the user is about to write in a certain location on the pa... | 04/15/2008 |
| 7355516 | Method and apparatus for protecting culinary products A microwave-resistant and waterproof security tag for use with food products, especially meat products. The security tag includes a pair of single, open loop conductive traces in between which is disposed a similarly-shaped dielectric layer. This combination is enca... | 04/08/2008 |
| 7307591 | Multi-band antenna An antenna having a plurality of resonant frequencies and comprising a feed point, a ground point and a conductive track that extends from the feed point and returns to the ground point and means for locally increasing the reactance of the antenna track at a first p... | 12/11/2007 |
| 7271772 | Mobile wireless communications device comprising multi-frequency band antenna and related methods A mobile wireless communications device may include a housing and a multi-frequency band antenna carried within the housing. The multi-frequency band antenna may include a main loop conductor having a gap therein defining first and second ends of the main loop condu... | 09/18/2007 |
| 7250910 | Antenna apparatus utilizing minute loop antenna and radio communication apparatus using the same antenna apparatus An antenna apparatus includes a minute loop antenna and at least one antenna element. The minute loop antenna is provided to be electromagnetically close to a dielectric substrate including a grounding conductor, has a predetermined number N of turns and a predeterm... | 07/31/2007 |
| 7242359 | Parallel loop antennas for a mobile electronic device A mobile electronic device, such as a smart personal object includes an antenna system for emitting and receiving signals. The antenna system includes at least two antennas electrically connected in parallel to define an equivalent circuit having a reduced inductanc... | 07/10/2007 |
| 7202790 | Techniques for tuning an antenna to different operating frequencies Techniques for tuning an antenna to different operating frequencies are described. An apparatus includes a security tag with a substrate having a surface, a lead frame to mount on the surface and connect to an antenna, and an integrated circuit to connect to the lea... | 04/10/2007 |
| 7185278 | Separating and moving document objects using the movement of a wiper bar A tool is provided for managing the available space in an electronic document. The tool can be used to move document objects and/or expand the boundaries or margins of a page to enable the addition or expansion of one or more document objects. The tool also can be u... | 02/27/2007 |
| 7098866 | Reader or transmitter and/or receiver comprising a shielded antenna The reader or transmitter and/or receiver (22) includes a sheathed antenna formed of two groups of turns or coils (6, 8, 9; 16, 17). The first group of turns or coils forms a sheathed antenna. The second group includes two coils (16, 17) arrange... | 08/29/2006 |
| 7088879 | Miniature antenna and electromagnetic field sensing apparatus An electromagnetic field sensing apparatus includes an optical modulator, a miniature antenna for sensing the electromagnetic field, a light source, a first optical fiber, an optical detector and a second fiber. The optical modulator can vary the amplitude of a ligh... | 08/08/2006 |
| 7071887 | Antenna device capable of being tuned in wide band The present invention provides an antenna device capable of automatically obtaining excellent receiving sensitivity over a wide band. The antenna device comprises a rod-shaped base made of a dielectric material or a magnetic material; a stripe-shape radiating conduc... | 07/04/2006 |
| 7057574 | Method for designing a small antenna matched to an input impedance, and small antennas designed according to the method A method for designing a high performance, small antenna that is matched to a required output impedance, does not require filtering, is simple and inexpensive to manufacture, and is easily integrable with an RF power amplifier- with minimum cost, minimum external co... | 06/06/2006 |
| 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 |
| 6943688 | Antenna arrangement for RFID smart tags An antenna arrangement comprises at least two antenna loops disposed and overlapping in a plane to define a detection region adjacent thereto in which the antenna loops transmit and/or receive electromagnetic signals and through which a wireless article may pass. Th... | 09/13/2005 |
| 6924773 | Integrated dual band H-field shielded loop antenna and E-field antenna A dual band antenna system that combines into a single integrated device an H-field shielded loop antenna and an E-field antenna. The system includes an unshielded section bounded on each end by first and second shielded sections, respectively. Input frequency filte... | 08/02/2005 |
| 6867709 | Vehicle detector and classifier A vehicle detector and classifier comprises a plurality of electrically conductive loops 1 arranged substantially in a plane perpendicular to a road surface, for detecting vehicle wheels. The loops can be arranged in a transverse, vertical slot 2 and h... | 03/15/2005 |
| 6853341 | Antenna means The present invention relates to an antenna means for transmitting and/or receiving RF-signals in at least a first frequency band. The antenna means comprising a ground plane means (20) arranged to be connected to ground of a circuitry of a radio communicatio... | 02/08/2005 |
| 6839035 | Magnetically coupled antenna range extender A magnetically coupled antenna range extender structured to be interposed between an RF antenna and an electronic device. The antenna range extender is positioned between and proximate to one of the RF antenna and the electronic device, for extending the operating r... | 01/04/2005 |
| 6828940 | Communication device A communication device has at least one transmitter and/or receiver, an energy storage, and a signal coupling connecting the transmitter and/or receiver with the energy storage for transmitting and/or receiving a radio signal. ... | 12/07/2004 |
| 6791505 | METHOD FOR INCREASING EFFECTIVE HEIGHT OF A COMPACT ANTENNA ASSEMBLY, METHOD FOR ENSURING DIRECTIONAL EFFECT OF THE COMPACT ANTENNA ASSEMBLY AND COMPACT ANTENNA ASSEMBLIES FOR CARRYING OUT SAID METHODS A radio technology can be used for developing compact antenna assemblies for various uses. The compact antenna assembly includes and oscillatory circuit including a reactive component (8) and an inductance coil. The reactive component (8) is embodied i... | 09/14/2004 |
| 6696954 | Antenna array for smart RFID tags An antenna array comprises a plurality of antenna loops disposed to define a portal or passageway or other detection region in which the plural antenna loops transmit and/or receive electromagnetic signals. A processor coupled to the plural antenna loops ... | 02/24/2004 |
| 6675461 | Method for manufacturing a magnetic dipole antenna A method for manufacturing a magnetic dipole antenna employing one or more spacers is disclosed. The magnetic dipole antenna having three plates, where each plate has holes for inserting one or more spacers through the bottom and middle plates. The distan... | 01/13/2004 |
| 6351215 | Monitoring antenna system A monitoring system incorporates antennas that transmit signals at predetermined frequencies; the transmitted signals are received by tags located in the active monitoring area of the antenna which then transmit signals back to the antenna. The antennas a... | 02/26/2002 |
| 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 formed in parallel with the loop antenna main body.... | 06/05/2001 |
| 6239760 | Contrawound toroidal helical antenna An electrically small broadband antenna comprises a plurality generalized contrawound toroidal helical antenna elements, each made from a single continuous conductor divided into two length portions each of which are substantially the same length and whic... | 05/29/2001 |
| 6236378 | Antenna and cordless telecommunication apparatus comprising an antenna The antenna (1) includes a first conductor (2) folded in a plurality of loops (3) which at least partly overlap, seen in a first direction (z). As a result, the antenna (1) seen in the first direction (z) is compact and is therefore highly suitable for in... | 05/22/2001 |
| 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 and second electrically conductive end portions(18,20). A f... | 08/15/2000 |
| 6054965 | External antenna device for short-wave receivers An external antenna device for receiving short-wave broadcasts includes an antenna circuit section consisting of a tuner in which a loop antenna element and a variable-capacity diode are high-frequency-connected to each other in parallel, and a high-frequ... | 04/25/2000 |
| 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 antennas, and of optimal geometry and configuration for minimum v... | 01/11/2000 |
| 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 are substantially the same length and which have a generali... | 09/14/1999 |
| 5923298 | Multiband reception antenna for terrestrial digital audio broadcast bands The invention combines a loop antenna and a dipole antenna in a conformal antenna on the rear window glass of an automotive vehicle above the defogging heater grid. The loop and dipole are adapted to receive Digital Audio Broadcasting (DAB) signals in bot... | 07/13/1999 |
| 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 includes a conductive planar base element extending in a base... | 06/16/1998 |
| 5764196 | Multiple loop antenna In a multiple loop antenna comprising a combination of a plurality of loop antennas, at least one factor among the diameter of each loop antenna, the number of turns thereof, the direction thereof, the effective permeability thereof, the relative values o... | 06/09/1998 |
| 5754142 | High efficiency antenna using parallel conductors, single conductor and supporting materials A versatile antenna system that, can help improve and produce a new line of TVS, radios, pagers, cordless, radio telephone and other communications gear. In its basics, the antenna is smaller in its wavelength, competitive in value. Some additional featur... | 05/19/1998 |
| 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 the same length and which have a generalized helical patter... | 03/31/1998 |
| 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 direction of the transceiver when the transceiver is mounted on... | 09/30/1997 |
| 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 includes a conductive planar base element extending in a base... | 01/16/1996 |
| 5469180 | Method and apparatus for tuning a loop antenna A method and apparatus for rapidly determining the resonance of a loop antenna (7). In order to set the loop antenna (7) to the desired operating frequency, the antenna is used with an amplifier (15). In view of the high Q provided by the loop, it is used... | 11/21/1995 |
