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| Number | Title | Issue Date |
| 8330667 | Portable wireless device A method of offsetting a mismatch due to user interaction when handling a portable wireless terminal in which antenna matching is changed from inductive matching to capacitive matching in response to a reactance change exceeding a threshold level and vice versa when... | 12/11/2012 |
| 8319695 | Adjustable integrated circuit antenna structure An adjustable integrated circuit antenna structure includes an antenna, a ground plane, a plurality of transmission line circuit elements and a coupling circuit. The coupling circuit is operable to couple at least one of the plurality of transmission line circuit el... | 11/27/2012 |
| 7973730 | Adjustable integrated circuit antenna structure An adjustable integrated circuit antenna structure includes a plurality of antenna elements, a coupling circuit, a ground plane, and a transmission line circuit. The coupling circuit is operable to couple at least one of the plurality of antenna elements into an ant... | 07/05/2011 |
| 7768468 | Arrangement and method for increasing bandwidth An antennal arrangement for radio signals includes two loop antennas. Each of the antennas is provided with a capacitor. The antennas are separated from one another by a gap and are coupled to each other by a conductor. ... | 08/03/2010 |
| 7414533 | System for placing radio frequency identification (RFID) antennas, tags and interrogators A system and method for optimally placing radio frequency identification (RFID) antennas. The system varies the placement of RFID tag and interrogator antennas with respect to each other and a stationary object or objects. A signal generator sends a known reference ... | 08/19/2008 |
| 7391386 | Array antenna control device and array antenna device An array antenna apparatus (100) includes a radiating element (A0) for receiving a transmitted radio signal, two parasitic elements (A1, A2), and two variable reactance elements (12-1, 12-2) connected to the respectiv... | 06/24/2008 |
| 7362274 | Coupled feed-in butterfly shaped left/right hand circularly polarized microstrip antenna A coupled feed-in butterfly shaped left/right hand circularly polarized microstrip antenna includes a delta resonator, a butterfly shaped radiator, an elongated rectangular feed line, a connecting sheet, a cylindrical conductor, a signal receiving adapter, and a fee... | 04/22/2008 |
| 7330157 | Antenna device having wide operation range with a compact size This patent specification describes an antenna device which includes a non-directional antenna having a radiating element and a ground plate, a coaxial line configured to feed an electromagnetic power to the non-directional antenna, a dielectric film arranged on the... | 02/12/2008 |
| 7286095 | Inverted feed discone antenna and related methods The discone antenna includes a conical antenna element, having an apex, and a disc antenna element adjacent the apex of the conical antenna element. An inverted antenna feed structure, such as a flanged coaxial connector or coaxial cable, is connected to the disc an... | 10/23/2007 |
| 7269399 | Receiver of double conversion system with antenna tuning with variable capacitance using digital-to-analog converter having temperature coefficient setting section A receiver of double conversion system wherein unwanted components included in received signals can be removed without fail and wherein the number of constituent parts has been reduced. The receiver comprises an antenna tuning circuit 10 including a tuning co... | 09/11/2007 |
| 7209096 | Low visibility dual band antenna with dual polarization A low visibility, field-diverse, dual band antenna provides cross-polarized fields enhancing signal communications. A generally flat, but helical, antenna is achieved in conjunction with a core substrate about which the antenna is wrapped, wound, or fixed. The core ... | 04/24/2007 |
| 7180458 | Antenna and information communication apparatus using the antenna An antenna including a grounded conductor and a radiating element having a diameter that increases from the top to the bottom in which the top of the radiating element is opposed to the grounded conductor is disclosed. The radiating element of the antenna includes t... | 02/20/2007 |
| 7176840 | Variable spacing inductance coil apparatus and method A variable inductance electrical device is an electrical conductor arranged in a flexible helical coil with a multiplicity of windings connected to a traveler plate and a fixed plate coaxially arranged a distance from the traveler plate. The conductor is arranged in... | 02/13/2007 |
| 7132948 | System for optimally placing radio frequency identification (RFID) antennas, tags, and interrogators A system and method for optimally placing radio frequency identification (RFID) antennas. The system varies the placement of RFID tag and interrogator antennas with respect to each other and a stationary object or objects. A signal generator sends a known reference ... | 11/07/2006 |
| 7129907 | Broadband tunable antenna and transceiver systems The present invention is directed to multi-element antennas that include, for each adjacent pair of antenna elements, at least one switch arranged to selectively connect that pair to thereby selectively alter an antenna dimension. Accordingly, a multi-element antenn... | 10/31/2006 |
| 7113139 | Tunable antenna circuit, particularly for contactless integrated circuit reader An antenna circuit tunable to a determined resonance frequency, includes an antenna coil and adjustable components. The antenna circuit includes a filter having at least one point to tap an electric voltage the amplitude of which forms a pertinent indication for the... | 09/26/2006 |
| 7106270 | Array antenna capable of controlling antenna characteristic An array antenna includes a feeder element, a parasitic element implemented by a slot line, a variable capacitance element, and a directivity switching unit. The variable capacitance element is loaded in the slot line. The directivity switching unit supplies a contr... | 09/12/2006 |
| 7091917 | Complex antenna apparatus A complex antenna apparatus including a base, a circular polarization antenna and a capacitance (inductance) cylinder loading monopole antenna. The base has a central through hole. The circular polarization antenna is disposed on the base and has a hollow feeding po... | 08/15/2006 |
| 7084824 | Antenna system utilizing top loading wires having adjustable electrical lengths An antenna system is presented herein. This includes an electrically conductive vertical mast radiator. A plurality of top loading electrically conductive wires extend from the radiator. Each wire has an inner end electrically connected to the radiator and an outer ... | 08/01/2006 |
| 7084835 | Compact antenna assembly A compact antenna assembly which includes a lower member having a mast that is an elongated configuration terminating at an upper end and a lower end. The mast can be located at the center of an upper member. The upper member includes an emitter, having a perimeter,... | 08/01/2006 |
| 7078642 | Arc extinguishing device with a high speed whip Rapid arc extinguishing devices for air break switches have a whip with at least an end portion of nonmetallic material such as fiber reinforced plastic with a conductive path on its surface. The nonmetallic material is a single tapered rod or an assembly of a plura... | 07/18/2006 |
| 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 |
| 7068234 | Meta-element antenna and array An antenna having at least one main element and a plurality of parasitic elements. At least some of the elements have coupling elements or devices associated with them, the coupling elements or devices being tunable to thereby control the degree of coupling between ... | 06/27/2006 |
| 7034773 | Adaptive multifilar antenna A multifilar antenna (200) comprises n spaced antenna filaments, where n is on integer greater than 1; a matching circuit (210) for matching the characteristic impedance of the antenna to that of a transmitting and/or receiving apparatus; a weig... | 04/25/2006 |
| 7002527 | Variable-directivity antenna and method for controlling antenna directivity A variable-directivity antenna comprises an omnidirectional antenna element, a transmission line connected to the antenna element, and an electric field adjusting structure provided in a boundary region between the antenna element and the transmission line. The elec... | 02/21/2006 |
| 6972720 | Antenna device capable of adjusting frequency An antenna device includes a ground conductor plate, and a radiating conductor plate made of a metal plate, which is spaced from the ground conductor plate. The radiating conductor plate is provided with adjusting means for adjusting the electrical length. Thus, the... | 12/06/2005 |
| 6965353 | Multiple frequency band antenna and signal receiving system using such antenna A multiple frequency band antenna includes a dipole antenna (4a), which is formed of two dipole antenna elements (8a, 10a). Two extension elements (24a, 26a) extend outward from respective ones of... | 11/15/2005 |
| 6963313 | Dual band sleeve antenna A cost efficient multi-band antenna, for use with non-harmonically related frequency bands, for example dual Wi-Fi frequency bands. An antenna element extends away from a ground plane. A sleeve positioned coaxial about the antenna element is spaced apart from the an... | 11/08/2005 |
| 6950070 | Arrangement for a mobile terminal A mobile terminal (1), comprising a casing (2), which accommodates radio electronic circuits (REC) and a screening device (SD) for the radio electronic circuits, comprises an antenna system comprising an end-fed antenna (EA), having an extended shape, ... | 09/27/2005 |
| 6919858 | RF antenna coupling structure An RF antenna coupling structure includes a first transformer, a second transformer, and a transformer balun. The first transformer includes a primary winding and a secondary winding, wherein the primary winding of the first transformer is operably coupled to a powe... | 07/19/2005 |
| 6906677 | Antenna, antenna device, and radio equipment An antenna has a conductive bottom member; a conductive side member; and a conductive member arranged in a space surrounded by the bottom member and the side member, wherein the conductive member i... | 06/14/2005 |
| 6873300 | Antenna system utilizing elevated, resonant, radial wires An antenna system is presented including an electrically conductive radiating mast that extends generally vertical relative to earth ground. The mast has a lower end for receiving RF energy for radiation thereby at an operating RF frequency and an upper end. A plura... | 03/29/2005 |
| 6795037 | Radio-frequency antenna for a magnetic resonance system A radio-frequency antenna for a magnetic resonance system has a basic element with two end rings and a number of antenna rods, and a radio-frequency mirror. The end rings are arranged concentrically relative to an antenna axis can and are axially offset from one ano... | 09/21/2004 |
| 6791504 | Tunable antenna system A tunable antenna system includes an antenna, a tuning mechanism, and a key that relates points of adjustment in the tuning mechanism to different installations of the antenna. The antenna can be tuned for a given installation by applying the key to the antenna with... | 09/14/2004 |
| 6721544 | Duplexer structure for coupling a transmitter and a receiver to a common antenna A duplexer structure for allowing an RF transmitter and an RF receiver to share a common antenna includes impedance matching circuitry to match the receiver input impedance to the antenna impedance during a receive operation and impedance transformation circuitry to... | 04/13/2004 |
| 6693541 | RFID tag with bridge circuit assembly and methods of use Radio frequency identification tag devices with bridge circuit assemblies and methods for high-volume, low-cost production are disclosed. The bridge circuit assemblies and methods of the present invention can reduce the complexity of the RFID tag devices ... | 02/17/2004 |
| 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 |
| 6590543 | Double monopole meanderline loaded antenna A wideband double monopole meanderline loaded antenna having a single feed a single feed is disclosed. Equalizing delay lines of the antenna can be manipulated to equalize reactance of the antenna thereby enabling proper impedance matching.... | 07/08/2003 |
| 6496154 | Frequency adjustable mobile antenna and method of making A frequency adjustable radio antenna includes a conductive whip on an insulated cylindrical coil housing electrically connected to the upper end of a tuning coil within the housing. A commutator attached to a conductive shaft is raised/lowered to interpos... | 12/17/2002 |
| 6407719 | Array antenna An array antenna apparatus includes a radiating element (6) for transmitting and receiving radio signals, and at least one parasitic element (7) arranged at a predetermined distance (d) away from the radiating element (6) and incapable of transmitting or ... | 06/18/2002 |
