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Class 343/860 - Impedance matching network


Subclass of Class 343 - Communications: radio wave antennas
Definition: Subject matter wherein the passive coupling network includes
No. of patents: 251
Last issue date: 03/19/2013


1              
NumberTitleIssue Date
8400369Multiband antenna and radio communication terminal
A multiband antenna includes at least two antenna elements for use in a low frequency band and a high frequency band, a feeding point unit configured to be shared by both of the antenna elements for use in the low frequency band and the high frequency band and an im...
03/19/2013
8294632Antenna interface circuits including tunable impedance matching networks, electronic devices incorporating the same, and methods of tuning antenna interface circuits
An antenna interface circuit for a wireless communication device includes a tunable matching circuit that is coupleable to an antenna. The tunable matching circuit includes a variable impedance element having a variable impedance Ztune. The interface circuit further...
10/23/2012
8284116Antenna apparatus for internal impedance matching
An antenna apparatus allows for internal impedance matching by employing an internal matching device therein. The antenna apparatus includes a board body formed of a dielectric material and having a flat structure. The antenna apparatus also includes an antenna devi...
10/09/2012
8279133Antenna device
An antenna device is provided with an antenna element including a base, an inductance adjustment pattern that is formed on the upper surface and a side surface of the base and has a substantially U-shape, a capacitance adjustment pattern that is formed on the upper ...
10/02/2012
8228258Multi-port antenna
A multi-port antenna structure includes a plurality of electrically conductive elements arranged generally symmetrically about a central axis with a gap between adjacent electrically conductive elements. Each of the electrically conductive elements has opposite ends...
07/24/2012
8144071Antenna device and portable radio communication device comprising such an antenna device
A quad-band antenna device (10) for a portable radio communication device comprises two radiating elements (12, 14) of different lengths and two common conductors (18, 20) of different lengths. One of the common conductors can be selectively con...
03/27/2012
8144072Multi-band antenna for notebook computer
A multi-band antenna includes an insulative carrier board arranged on the top side of the display screen of a notebook computer, a main antenna which has the top metal strip thereof disposed at the top edge of the insulative carrier board and the grounding metal str...
03/27/2012
8120545Multifunctional antenna chip
A multifunctional antenna chip is able to mate with many kinds of matched circuits and is able to adjust the character of an antenna structure of the multifunctional antenna chip, in order that the antenna structure has one or multiple standard working frequencies. ...
02/21/2012
8106847Communication circuit, communication apparatus, impedance matching circuit and impedance matching circuit designing method
A communication circuit is provided with an antenna section, such as a nonresonant antenna, and a matching section which connects with the antenna section and adjusts impedance, for example. The matching section has a transmission line, and the electric length and c...
01/31/2012
8106848Programmable antenna with programmable impedance matching and methods for use therewith
A programmable antenna includes a fixed antenna element and a programmable antenna element that is tunable in response to at least one antenna control signal, wherein tuning the programmable antenna element changes an impedance of the antenna. A programmable impedan...
01/31/2012
8081136Dual-band antenna
The dual-band antenna is provided. The dual-band antenna includes an impedance matching control element, a first connection part, a first radiation element, a second radiation element, and a ground element. The first radiation element operates in a first frequency b...
12/20/2011
8040289Low-profile wide-bandwidth radio frequency antenna
The present invention relates to an RF antenna structure that includes a planar structure and a loading plate, such that the planar structure is mounted between a ground plane and the loading plate to form an RF antenna. The loading plate may be about parallel to th...
10/18/2011
8022888Antenna device
An antenna device includes a first radiator receiving a first feed signal, a second radiator spaced apart from the first radiator at a predetermined distance and capacitively coupled with the first radiator, a feed line connected to a feed terminal of the first radi...
09/20/2011
7982683Antenna design for FM radio receivers
An apparatus includes first and second speakers, and an antenna including a first pair of wires connected to the first speaker, a second pair of wires connected to the second speaker, and a conductive sleeve surrounding portions of the first and second pairs of wire...
07/19/2011
7948445Wideband antenna and clothing and articles using the same
Provided are a first planar radiating element and second planar radiating element that have at least one side. At least the first or second radiating element has a strip-shaped element. A first side of the first radiating element and a second side of the second radi...
05/24/2011
7893888Programmable antenna with programmable impedance matching and methods for use therewith
A programmable antenna includes a fixed antenna element and a programmable antenna element that is tunable to one of a plurality of resonant frequencies in response to at least one antenna control signal. A programmable impedance matching network is tunable in respo...
02/22/2011
7859478Dipole antenna with improved performance in the low frequency range
A dipole antenna is provided herein with improved performance at a lower end of the antenna's operating frequency range. According to one embodiment, the dipole antenna may include a plurality of antenna elements coupled to impedance transformer via a pair of cones ...
12/28/2010
7847751Planar broadband antenna
A planar broadband antenna includes a flat elliptical antenna device. The elliptical antenna device includes a central antenna element, a first angular antenna element and a second angular antenna element. The central antenna element is disposed parallel to a suppor...
12/07/2010
7812781Matching device and antenna matching circuit
A battery portion (BAT) or another type of voltage shift portion is provided for shifting a control voltage (V2) in a direction which causes the anode potential of a variable-capacitance diode (VD) to be a negative potential and superimposes its battery volta...
10/12/2010
7808444Two-way antenna connector
A system includes a first matching network having a first impedance and a second matching network having a second impedance, where the second impedance is different than the first impedance. The system further includes a switching connector having first and second s...
10/05/2010
7786949Antenna
An antenna includes inductance elements that are magnetically coupled together, an LC series resonant circuit that includes one of the inductance elements and capacitance elements, and an LC series resonant circuit that includes another of the inductance elements an...
08/31/2010
7746290Adaptive antenna matching
The present invention relates to a portable communication device and a method of controlling the matching of an antenna in a portable communication device. The device may include an antenna; a radio circuit to send a radio frequency signal to the antenna via a signa...
06/29/2010
7714795Multi-band antenna apparatus disposed on a three-dimensional substrate, and associated methodology, for a radio device
Antenna apparatus, and an associated methodology, for a multi-frequency-band-capable radio device, such as a quad-band mobile station. The antenna apparatus is formed from a three-dimensional rectilinear non-conductive dielectric antenna substrate, such as cube. An ...
05/11/2010
7696947Radio frequency identification transponder antenna
A RFID transponder having a microchip or integrated circuit, an impedance-matching structure and a resonant structure mounted on at least one substrate and connected to each other by an electric field. ...
04/13/2010
7659864Broadband antenna
A broadband antenna has a substrate, a coupling conductor, a conductor string, a ground conductor and a ground plane. The coupling conductor has a first coupling member and a second coupling member being separated from each other. The conductor string and the ground...
02/09/2010
7652636RFID devices having self-compensating antennas and conductive shields
A radio frequency identification (RFID) tag includes an antenna configuration coupled to an RFID chip, such as in an RFID strap. The antenna configuration is mounted on one face (major surface) of a dielectric material, and includes compensation elements to compensa...
01/26/2010
7639199Programmable antenna with programmable impedance matching and methods for use therewith
A programmable antenna includes a fixed antenna element and a programmable antenna element that is tunable to one of a plurality of resonant frequencies in response to at least one antenna control signal. A programmable impedance matching network is tunable in respo...
12/29/2009
7639200Antenna
An antenna includes a ground plane, a match portion, and a radiation portion. The ground plane is used for grounding. The match portion is parallel to the ground plane, and is connected to the ground plane. The radiation portion is connected to one end of the match ...
12/29/2009
7629942Antenna
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 resonant circuit that includes another of the inductance elements and ca...
12/08/2009
7612733Transition 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 first and second non-insulating strips cooperate to form an antenna havin...
11/03/2009
7583237Antenna 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 component is comprised of a pattern formed on at least one second laye...
09/01/2009
7439934Antenna 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. Secured to the end face of the core is an impedance matching section ...
10/21/2008
7409245Variable 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 change the antenna efficiency and hinder communication. The disclose...
08/05/2008
7382324Recording/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 antenna connected to an in-cassette memory. The playback apparatus i...
06/03/2008
7379714Method 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 between the PA and the antenna is adjusted based on power level measuremen...
05/27/2008
7372412Transceiver-integrated antenna
The transceiver-integrated antenna includes an antenna element, a ground plate for grounding the antenna element, and a transceiver configured to transmit and receive radio signals through the antenna element. The transceiver is housed in a recess formed in the grou...
05/13/2008
7372402Method for enhancing the measuring accuracy in an antenna array
The invention refers to a method and a system for enhancing the measuring accuracy in an antenna array (1), where the method comprises the steps of; a) receiving analog signals on all antenna elements (2) at a first time t1; producing first ...
05/13/2008
7369096Impedance matched passive radio frequency transmit/receive switch
A Radio Frequency (RF) structure services an antenna having a characteristic impedance and includes a differential Power Amplifier (PA), a differential Low Noise Amplifier (LNA), and a balun transformer. The differential PA has a differential PA output with a PA dif...
05/06/2008
7365701System and method for generating a genetically engineered configuration for at least one antenna and/or frequency selective surface
An optimal configuration for at least one antenna and/or at least one frequency selective surface is generated. A configuration of elements is generated by selecting a simple configuration of at least one element and applying a genetic algorithm to the simple config...
04/29/2008
7366304Cruable U-NII wireless radio with secure, integral antenna connection via SM BIOS in U-NII wireless ready device
A method that utilizes software and hardware mechanisms to meet the FCC requirement for a U-NII antenna to be an integral part of the device in which it operates, while providing wireless ready U-NII devices and CRUable U-NII radios. Enhancements are made to the sof...
04/29/2008
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