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7633459 |
Antenna and an antenna feed structure
A dielectrically-loaded helical antenna has a ceramic cylindrical core and, formed on the cylindrical surface of the core, a plurality of conductive helical antenna elements. The antenna elements...
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7629942 |
Antenna
An antenna includes inductance elements that are magnetically coupled together, an LC series resonant circuit that includes one of the inductance elements capacitance elements, and an LC series...
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7619566 |
Impedance transformation type wide band antenna
The present invention relates to an impedance transformation-type wide band internal antenna. The wide band antenna includes a radiation part, a short circuit part, a feeding part, and a feeding...
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7612733 |
Transition region for use with an antenna-integrated electron tunneling device and method
An electron tunneling device includes a first non-insulating strip and a second non-insulating strip spaced apart from one another such that first and second end portions, respectively, of the...
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7595732 |
Power generating circuit
A power generating circuit includes a rectifying module and a tuning module. The rectifying module is operably coupled to convert a radio frequency (RF) signal into a voltage. The tuning module is...
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7592961 |
Self-tuning radio frequency identification antenna system
A self-tuning antenna that automatically adjusts its input impedance to compensate for externally induced impedance variations is provided. A variable impedance is adjusted by a control circuit to...
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7583237 |
Antenna module having a multilayered substrate with built-in components which are connected to mounted components
A multilayered substrate includes a first layer and at least one second layer laminated on one face of the first layer. A first component is mounted on the other face of the first layer. A second...
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7583235 |
Folded dipole loop antenna having matching circuit integrally formed therein
A folded dipole loop antenna has a matching circuit integrally formed therein. The antenna includes a radiating unit formed in the shape of a loop, and the matching circuit has an extended part...
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7557757 |
Inductively coupled feed structure and matching circuit for RFID device
A feed structure ( 18 ) and matching circuit ( 20 ) for inductively coupling an antenna ( 16 ) with an IC ( 22 ) in an RFID tag ( 10 ). The tag ( 10 ) includes first and second feed structures (...
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7525504 |
Low cost multi-beam, multi-band and multi-diversity antenna systems and methods for wireless communications
Systems and methods for employing switched phase shifters and a feed network to provide a low cost multiple beam antenna system for wireless communications. The present systems and methods may also...
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7508349 |
Antenna device and wireless communication apparatus
The present invention relates to an antenna device built into a casing, the antenna device configured to prevent the deterioration of antenna characteristics by switching the antenna operation. The...
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7501959 |
Signal incoming direction estimation apparatus
A signal incoming direction estimation apparatus is constructed so as to comprise a sensor array having plural sensors and the impedance of each of the sensors being set to a predetermined value,...
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7454227 |
Wireless communication module, communication terminal, and impedance matching method
A wireless communication module for engaging in communications with a base station, the wireless communication module being incorporated into an information device having an antenna, includes a...
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7439934 |
Antenna and an antenna feed structure
A dielectrically-loaded helical antenna has a cylindrical ceramic core bearing metallised helical antenna elements which are coupled to a coaxial feeder structure passing axially through the core....
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7409245 |
Variable antenna matching network for an implantable antenna
An implantable medical device may have an antenna for communication with external devices or other internal devices. Changes in the patient's body position, weight, composition or other factors may...
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7382324 |
Recording/playback apparatus with electric wave transmission
A recording/playback apparatus accommodates a recording medium in a cassette shell and performs recording and/or playback with respect to the recording medium cassette provided with a cassette-side...
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7379714 |
Method and apparatus for dynamically adjusting a transmitter's impedance
A method and apparatus for dynamically adjusting the impedance between a transmitter's power amplifier (PA) and antenna to efficiently transfer power from the PA to the antenna. The impedance...
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7358923 |
Enhanced magnetic field communication system
Devices and methods are provided to enhance magnetic field communication. One aspect of the present subject matter relates to a method for transmitting and receiving signals using an antenna...
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7348931 |
Unbalanced power feeding antenna device for making radio communications
An antenna device which is connected to a radio module performing radio communications with a system using a first band and a system using a second band, has an antenna element which...
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7342545 |
Antenna system configuration for mobile phones
An antenna configuration for a flip type mobile phone is disclosed. The antenna configuration is designed to reduce, to a hearing aid compatibility (HAC) M 3 rating or better, any scattered EM...
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7339545 |
Impedance matching means between antenna and transmission line
An impedance matching means according to the present invention is used with an antenna and is realized by a parasitic element ( 3 ) for tuning an impedance of the antenna. The antenna comprises a...
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7292194 |
Inverted-F antenna and method of modulating impedance of the same
An inverted-F antenna ( 1 ) used in a portable electrical device formed in a metal patch and includes a radiating element ( 2 ), a grounding element ( 5 ), and an impedance matching element ( 3 )...
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7274340 |
Quad-band coupling element antenna structure
An antenna module has a substrate, first and second coupling elements, and first and second resonant circuits disposed on the substrate. The first and second coupling elements are mounted to the...
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7265731 |
Method and apparatus for improving the performance of a multi-band antenna in a wireless terminal
A method and apparatus for improving the efficiency of a multi-band antenna in a wireless terminal over a wide range of frequencies is described herein. To compensate for the undesirable coupling...
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7262701 |
Antenna structures for RFID devices
An improved antenna structure for RFID tags uses a pair of bent dipole antennas having arms that extend substantially about an outer edge of an RFID substrate. The antennas can be adjusted to...
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7242364 |
Dual-resonant antenna
A wide-band antenna comprises a series-resonant antenna and a resonant circuit. The antenna has a radiative element and a feed pin. The resonant circuit comprises an inductive element connected to...
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7239289 |
Device and method for antenna matching in portable wireless terminal with built-in antenna
Disclosed is an antenna matching device of a folder type portable wireless terminal with a built-in antenna. In the antenna matching device, a π-type matching circuit is connected between an...
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7221327 |
Tunable matching circuit
The present invention provides for low loss tunable matching circuits at rf frequencies. Ferro-electric materials are used to produce low loss tunable capacitors and inductors for use in matching...
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7209792 |
RF-energy modulation system through dynamic coil detuning
An RF-energy modulation system dynamically adjusts tuned receiving circuits within a plurality of slave devices, thereby regulating the level of power reception in each slave device. The slave...
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7202829 |
Broadband mobile antenna with integrated matching circuits
A wide band mobile antenna assembly having a whip, a base defining a housing, an adaptor extending on top of the base above the housing, and a mounting element extending in the housing. The...
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7190933 |
Method and apparatus for automatic tuning of a resonant loop antenna in a transceiver circuit
Disclosed is a circuit and method for automatic tuning of a resonant circuit in a transceiver having a receiver and a transmitter that includes a power amplifier for driving the resonant circuit....
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7184727 |
Full-duplex antenna system and method
A system and method is provided for full-duplex antenna impedance matching. The method comprises: effectively resonating a first antenna at a frequency selectable first channel in a first frequency...
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7181171 |
System and method for providing auxiliary reception in a wireless communications system
A system and method for providing auxiliary reception in a wireless communications system includes a wireless communications device. The wireless communications device includes a first antenna and...
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7162264 |
Tunable parasitic resonators
A mobile terminal can include a printed circuit board with a reference voltage conductor, an antenna coupled to the first side of the printed circuit board, and a parasitic resonator coupled to the...
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7158091 |
Radio frequency identification transponder with a quadrupler or N-tupler circuit for efficient RF to DC conversion
A multistage voltage multiplying circuit for single chip passive RF tags is provided, wherein the parasitic capacitance of the diodes of each stage of the voltage multiplying circuit is much less...
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7154448 |
Antenna module
An antenna module having at least one reception antenna for converting electromagnetic waves to electrical signals, at least one transmission antenna for converting electrical signals to...
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7148858 |
Portable receiver
A portable receiver includes an antenna to which at least FM broadcast wave is inputted, a matching circuit to which the signal input to the antenna is supplied via minute resistance component, an...
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7142166 |
Wide band biconical antennas with an integrated matching system
A biconical antenna; an entry conic having an entry base opposite an entry vertex and a termination conic having a termination base opposite a termination vertex. The entry and termination conics...
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7123202 |
Antenna window with high-frequency component
An antenna window with a high-frequency electric component placed fixedly on one of its surfaces, which is electrically connected to a conductor structure provided on the same surface of the...
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7123209 |
Low-profile, multi-frequency, differential antenna structures
A differential antenna structure configured to connect to an electronic circuit having differential inputs and output. The antenna structure includes differential feeding points which are connected...
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7113087 |
Proximity sensing based on antenna impedance variation
Proximity of a user body part can be detected by measuring the effects such proximity has on antenna impedance mismatches. The amount of mismatch affects the amount of RF signal energy reflected...
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7109944 |
Antenna using variable capacitance element and wireless communication apparatus using the same
An antenna is constituted in which a variable capacitance capacitor portion Ct is connected between an antenna element and a ground. In the variable capacitance capacitor, a plurality of variable...
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7107026 |
Automatic matching and tuning unit
An automatic matching and tuning unit (AMTU), which connects the output from a low or medium frequency, high power radio transmitter, which requires a 50 ohm terminating impedance, to an antenna...
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7102587 |
Embedded antenna connection method and system
A technique is provided for interconnecting an embedded antenna with external circuitry. The antenna may be formed on an intermediate layer of a layered structure, such as a laminate. The...
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7091918 |
Rectifying antenna and method of manufacture
In accordance with the present invention, an aperture rectenna is provided where the substrate is transparent and of sufficient mechanical strength to support the fabricated structure above it. An...
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7088307 |
Antenna matching circuit, mobile communication device including antenna matching circuit, and dielectric antenna including antenna matching circuit
In an antenna matching circuit including a parallel resonant section connected to a radiation element constituting an antenna, the parallel resonant section includes a series resonant portion...
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7084831 |
Wireless device having antenna
A wireless device includes a first antenna element resonating with a first frequency, a first feeding point coupled to the first antenna element and disposed on a ground plane in the wireless...
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7058372 |
Method and apparatus for automatic tuning of a resonant loop antenna
Disclosed is a circuit and method for continuous automatic tuning of a resonant circuit. A resonance voltage of the resonant circuit is phase shifted by a predetermined phase shift Φ degrees and...
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7050016 |
Matching unit and receiver apparatus using the same
A matching device causes an antenna to match a receiving section arranged to receive a signal in a first frequency band and a signal in a second frequency band lower than the first frequency band....
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7015870 |
Integrated bi-band inductance and applications
A multi-band inductive circuit in an integrated circuit, including at least two parallel branches respectively including a first inductance and a second inductance in series with a capacitor, the...
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