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Balun patents



      

This page is updated frequently with new Balun-related patent applications.




Date/App# patent app List of recent Balun-related patents
05/19/16
20160142077 
 Dual-band filter and operating method therof patent thumbnailDual-band filter and operating method therof
A dual-band filter and method thereof include a diplexer configured to process one of a first band signal and a second band signal, which includes a frequency band different from a frequency band of the first band signal, and block the other of the first band signal and the second band signal. A balun is configured to convert the first band signal from a differential signal to a single signal in response to the first band signal being transmitted, and convert the first band signal from a single signal to a differential signal in response to the first band signal being received.
Samsung Electro-mechanics Co., Ltd.


05/19/16
20160142037 
 Balun transformer patent thumbnailBalun transformer
A balun transformer includes an input terminal into which an unbalanced signal is input, a converter that includes at least a first signal line connected to the input terminal and that converts the unbalanced signal into a balanced signal, a first output terminal connected to the first signal line, a second output terminal from which the balanced signal is output, the balanced signal being also output from the first output terminal, and a capacitor connected between the input terminal and the second output terminal.. .
Murata Manufacturing Co., Ltd.


05/19/16
20160142036 
 Baluns for rf signal conversion and impedance matching patent thumbnailBaluns for rf signal conversion and impedance matching
A magnetically-coupled structure is integrated with an integrated circuit in back end-of-line (beol) digital cmos fabrication processes. A differential primary (or secondary) coil is formed by patterning a thick copper (cu) metal layer, and a single-ended secondary (or primary) coil is formed by patterning a thick aluminum (al) top metal bonding layer.
Texas Instruments Incorporated


05/12/16
20160134252 
 Method and balun for trapping rf current on a transmission line after installation patent thumbnailMethod and balun for trapping rf current on a transmission line after installation
Apparatus and method for a radially attachable rf trap attached from a side to a shielded rf cable. In some embodiments, the rf trap creates a high impedance on the outer shield of the rf cable at a frequency of rf signals carried on at least one inner conductor of the cable.
Life Services, Llc


05/05/16
20160126983 
 Multi-band amplifier patent thumbnailMulti-band amplifier
A multi-band amplifier may operate in a first frequency band and a second frequency band. The multi-band amplifier may include a first amplifier, a second amplifier, and a coupler.
Qualcomm Incorporated


05/05/16
20160126725 
 Electrostatic discharge protection for a transformer balun patent thumbnailElectrostatic discharge protection for a transformer balun
A balun includes an input coil and an output coil with first and second outputs that vary during normal operation. The output coil has a center point connection that remains substantially constant during normal operation.
Silicon Laboratories Inc.


05/05/16
20160126612 
 Balun for converting between multiple differential signal pairs and a single-ended signal patent thumbnailBalun for converting between multiple differential signal pairs and a single-ended signal
A balun includes a first transmission line and a number (n) of second transmission lines. The first transmission line includes an end terminal for receiving or outputting a signal with a target wavelength, and having a length of half the target wavelength.
National Chi Nan University


04/14/16
20160105154 
 High-frequency generator patent thumbnailHigh-frequency generator
The power stage at the output of a high-frequency generates operates in class d and comprises a voltage supply and a common earth, a first and a second switch linked to the common earth and periodically switched on at a high frequency f; these switches are linked to two common-mode inductors connected in a guanella balun. Each common-mode inductor comprises two inductive lines with strong mutual coupling.

03/31/16
20160093946 
 Interlaced element uhf/vhf/fm antenna patent thumbnailInterlaced element uhf/vhf/fm antenna
A uhf/vhf/fm antenna consisting of two elongated octagonal elements formed individually from ¼″ o.d. (outer dimension) flexible copper tubing, interlaced with each other before coupling of the open tubing ends, then concentrically aligned perpendicular to each other, and soldered at a interlacing cross points.

03/17/16
20160079662 
 Ultra-wideband antenna assembly patent thumbnailUltra-wideband antenna assembly
An antenna assembly having a pair of feed conductive elements directed in divergent directions, with each pair of conductive elements including a conical sheet conductor and a cylindrical sheet conductor, and radiating wire conductors extending away from each cylindrical sheet conductor. A balun feed system is defined between the pair of conical sheet conductors.

03/03/16
20160065392 

Mobile terminal


A mobile terminal is provided. The mobile terminal includes: a base band processor; a main rf transceiver electrically coupled to the base band processor; a balun unit adapted to receive single-ended rf signals, and convert the single-ended rf signals whose frequencies are within a preset range into differential rf signals; and a diversity rf receiver electrically coupled to the base band processor and the balun unit, which is adapted to receive the differential rf signals converted by the balun unit and process the differential rf signals to generate baseband signals to be processed by the base band processor.
Spreadtrum Communications (shanghai) Co., Ltd.


03/03/16
20160058508 

Narrow gauge high strength choked wet tip microwave ablation antenna


An electromagnetic surgical ablation probe having a coaxial feedline and cooling chamber is disclosed. The disclosed probe includes a dipole antenna arrangement having a radiating section, a distal tip coupled to a distal end of the radiating section, and a ring-like balun short, or choke, which may control a radiation pattern of the probe.
Covidien Lp


03/03/16
20160058507 

Microwave ablation system


A microwave ablation catheter assembly is provided. A coaxial cable configured to connect to a microwave energy source at its proximal end and at its distal end to a distal radiating section.
Covidien Lp


02/18/16
20160049910 

Doherty power amplifier combiner with tunable impedance termination circuit


Doherty power amplifier combiner with tunable impedance termination circuit. A signal combiner can include a balun transformer circuit having a first coil and a second coil.
Skyworks Solutions, Inc.


02/11/16
20160038234 

Microwave ablation catheter and utilizing the same


A microwave ablation catheter is provided. The microwave ablation catheter includes a coaxial cable connected at its proximal end to a microwave energy source and at its distal end to a distal radiating section.
Covidien Lp


02/11/16
20160038232 

Microwave energy-delivery device and system


A method of manufacturing a microwave ablation device, the method including applying a balun short circumferentially about an outer conductor of a coaxial feedline and applying a dielectric material circumferentially about the outer conductor of the coaxial feedline and in contact with the balun short to form a balun. The method further including extending a temperature sensor along the coaxial feedline such that the sensor contacts the balun short, securing the temperature sensor to the coaxial feedline with a first heat shrink material, and securing the dielectric material, balun short, and temperature sensor in contact with each other and to the coaxial feedline using a second heat shrink material..
Covidien Lp


02/04/16
20160036408 

Snap-on coaxial cable balun and trapping rf current on outside shield of coax after installation


Apparatus and method for a radially attachable rf trap attached from a side to a shielded rf cable. In some embodiments, the rf trap creates a high impedance on the outer shield of the rf cable at a frequency of rf signals carried on at least one inner conductor of the cable.
Life Services, Llc


02/04/16
20160036390 

Multi-mode integrated power amplifier


A method and apparatus are disclosed for transmitting communication signals through a multi-mode power amplifier. For at least some embodiments, a communication signal may be amplified by an amplifier of the multi-mode power amplifier selected based on a desired transmit output power.
Qualcomm Incorporated


02/04/16
20160033596 

Detector grid arrays for mr imaging


The present disclosure describes examples of magnetic resonance (mr) detector that may replace conventional mr imaging coil arrays. The present disclosure generally describes an example coil design approach that may reduce the number of components for mr imaging devices and may eliminate the need of tissue matching.
Children's Hospital Medical Center


01/28/16
20160028432 

Complementary metal oxide semiconductor differential antenna transmit-receive switches with power combining circuitry for orthogonal frequency-division multiplexing systems


A radio frequency (rf) transmit-receive switch has an antenna port, first and second transmit differential ports and first and second receive differential ports. Transmit transistor switches are connected to the transmit differential ports.
Rfaxis, Inc.


12/31/15
20150380946 

Wireless electric field power transmission system, transmitter and receiver therefor and wirelessly transferring power


A wireless electric field power transmission system comprises a transmitter comprising a transmit resonator and a transmit capacitive balun, and at least one receiver comprising a receive resonator and a receive capacitive balun. The transmit capacitive balun is configured to transfer power to the transmitter resonator, the transmit resonator is configured to transfer the power to the receive resonator, and the receive resonator is configured to extract the power to the receive capacitive balun via electric field coupling..

12/31/15
20150380801 

Planar balun transformer device


An electric transformer device (balun) is formed on a support plate having a first base face and an opposite second base face. The balun includes a first port (40) connectable to an electrical line for a differential signal and a second port connectable to an electrical line for a single-ended signal.
Stmicroelectronics S.r.l.


12/24/15
20150372377 

Dipole antenna array


According to the invention there is provided a dipole antenna array including at least one dipole antenna sub-array, wherein the dipole antenna sub-array includes a plurality of co-planar antenna units, each antenna unit including a pair of dipole radiating elements and a balun having an output line for providing output electrical signals to the pair of dipole radiating elements.. .
Bae Systems Plc


12/24/15
20150366615 

Microwave energy-delivery device and system


A microwave ablation device including a cable assembly configured to connect a microwave ablation device to an energy source and a feedline in electrical communication with the cable assembly. The microwave ablation device further includes a balun on an outer conductor of the feedline, and a temperature sensor on the balun sensing the temperature of the balun..
Covidien Lp


12/03/15
20150349732 

Common-source power amplifiers


A system includes a first amplifier stage and a second amplifier stage. The first amplifier stage is configured to amplify an input signal and generate first output signals.
Marvell World Trade Ltd.


11/26/15
20150341014 

Broadband integrated rf/microwave/millimeter mixer with integrated balun(s)


A broadband radio frequency, microwave, or millimeter mixer system may include a balun and a mixer. The balun may have an unbalanced port; a balanced port; a first and a second inductor tightly and inversely magnetically coupled to one another; and a third inductor which is not magnetically coupled to the first or the second inductors.
Linear Technology Corporation


11/26/15
20150340768 

Wideband and high gain omnidirectional array antenna


Systems and methods relating to antennas for transmission and reception of radio frequency communications. More particularly, implementations of the present invention relate to a high gain two element omnidirectional array, which through the employment of a combination balun/power divider and precise coaxial engagement to the antenna, converts the unbalanced coaxial transmission line voltage into a pair of balanced transmissions connecting with four radiating gaps..

10/22/15
20150304155 

Zigbee receiver exploiting an rf-to-bb current-reuse blixer and hybrid filter topology


A unified balun low noise amplifier (lna) and i/q mixer is provided as a single-chip design, and includes a passive/active gain-boosted balun-lna-i/q-mixer (blixer), a filter section and a buffer amplifier. The filter section includes an if-noise-shaping transistorized current-mode lowpass filter sharing a common power supply with the blixer, which allows the blixer and lowpass filter to draw a single bias current.
University Of Macau


10/22/15
20150303547 

Vaisman baluns and microwave devices employing the same


A planar balun comprises a balun input, a first balun output, a second balun output, two primary coupled lines with a first cross-sectional area disposed on an inhomogeneous medium, and two secondary coupled lines with a second cross-sectional area, the second coupled lines disposed on an inhomogeneous medium. Each of the primary coupled lines are coupled to one of the secondary coupled lines with a predetermined uniform surface space therebetween.
Scientific Components Corporation


10/15/15
20150295320 

Modified folded dipole antenna arrangement


Exemplary embodiments of the present disclosure include dipole arrangement, or an array of dipole arrangements which can include at least two poles extending in opposite direction from one another, each of the poles including capacitor and an inductor(s). A lattice balun can be located at a center gap between the poles, and can be a 50 ohm lattice balun.

10/08/15
20150288344 

Balun circuit


The present disclosure is directed to a balun circuit adapted to operate at a frequency of between about 5 ghz to about 110 ghz. The balun circuit includes first and second output striplines and an input stripline formed on a first surface of the substrate, and a slotline formed on a second surface of the substrate opposite the first surface.

10/08/15
20150288343 

Balun device


A balun device is disclosed herein. The balun device is configured to transform a single-ended signal into a differential signal.

09/17/15
20150263682 

Current re-using wideband low-noise active balun


Some aspects of the present disclosure relate to a low-noise amplifier (lna) having a balun configuration. The lna includes a dc current path coupling a first dc supply node to a second dc supply node.
Intel Mobile Communications, Gmbh


09/17/15
20150263404 

Thin film balun


A thin film balun that can be made smaller and thinner while maintaining required balun characteristics is provided. A thin film balun 1 includes: an unbalanced transmission line ul including a first coil portion c1 and a second coil portion c2; a balanced transmission line bl including a third coil portion c3 and a fourth coil portion c4 that are positioned facing and magnetically coupled to the first coil portion c1 and the second coil portion c2 respectively; an unbalanced terminal ut connected to the first coil portion c1; a ground terminal g connected to the second coil portion c2 via a c component d; and an electrode d2 connected to the ground terminal g and facing a part of the second coil portion c2.
Tdk Corporation


09/03/15
20150249292 

Electronic device with shared antenna structures and balun


An electronic device may be provided with shared antenna structures that can be used to form both a near-field-communications antenna such as a loop antenna and a non-near-field communications antenna such as an inverted-f antenna. The antenna structures may include conductive structures such as metal traces on printed circuits or other dielectric substrates, internal metal housing structures, or other conductive electronic device housing structures.
Apple Inc.


08/27/15
20150241529 

Loop coil with integrated balun for mr applications


An mr loop coil design incorporates a balun into the loop coil. With this approach, some components of the coil may be simultaneously part of the imaging coil and the balun.
Children's Hospital Medical Center


08/27/15
20150240459 

Communication device and working vehicle provided with the same


A reader writer (communication device) executes at least one of reading identification information stored in an ic tag and writing the identification information to the ic tag. The reader writer includes: a wireless control circuit that generates output for communication; a temperature sensor (temperature detector) that detects a temperature in an environment in which an rfid chip, balun, filter circuit, power amplifier, and coupler (elements for forming the wireless control circuit) are used; a temperature judging unit that judges whether or not the environment in which the element is used falls within a usable temperature range of the element based on the temperature detected by the temperature sensor; and a wireless power supply controller that suppresses a supply of power to the wireless control circuit when the temperature judging unit judges that the element is not in the environment within the usable temperature range..
Komatsu Ltd.


08/13/15
20150223883 

Electrosurgical devices with balun structure for air exposure of antenna radiating section and directing energy to tissue using same


An energy applicator for directing energy to tissue includes a feedline having an inner conductor, an outer conductor and a dielectric material disposed therebetween, and an antenna assembly having a radiating section operably coupled to the feedline. The energy applicator also includes a first balun structure configured to substantially confine energy to the radiating section when the energy applicator is energized and disposed in tissue, and a second balun structure configured to substantially prevent energy emitted from the radiating section from propagating proximal to the second balun structure along the feedline when the energy applicator is energized but not disposed in tissue..
Covidien Lp


07/30/15
20150214919 

Circuit


By separating the role of impedance transformation from balun signal conversion, the useful bandwidth of the circuit can be improved in comparison to a balun that provides both signal conversion and impedance transformation functions.. .

07/30/15
20150214592 

Feeding network, antenna, and dual-polarized antenna array feeding circuit


Embodiments of the present invention disclose a feeding network, and the feeding network includes: a first balun device of a first feeding subnetwork, where the first balun device is connected to a pcb positive 45-degree polarized port, which results in an equal amplitude and a 180-degree phase difference of signals at the first positive 45-degree polarized output port and the second positive 45-degree polarized output port; and a second balun device of a second feeding network, where the second balun device is connected to a pcb negative 45-degree polarized port, which results in an equal amplitude and a 180-degree phase difference of signals at the first negative 45-degree polarized output port and the second negative 45-degree polarized output port. The feeding network in the embodiments has a relatively small size and can cover multiple frequency bands..
Huawei Tachnologies Co., Ltd.


07/23/15
20150207499 

Frequency shift-keying reader circuit


A frequency shift-keying reader circuit includes a band-pass filter, a low noise amplifier, a first balun, an injection-lock divide-by-2 frequency divider, a sub-harmonic mixer and a low-pass filter. The band-pass filter performs a filtering procedure to a radio frequency signal, wherein the filtered radio-frequency signal is received by the low noise amplifier to provide an injection signal, and the injection signal is received by the first balun to generate a first differential signal and a second differential signal.
National Sun Yat-sen University


07/16/15
20150200645 

Snap-on coaxial cable balun and trapping rf current on outside shield of coax after installation


Apparatus and method for a radially attachable rf trap attached from a side to a shielded rf cable. In some embodiments, the rf trap creates a high impedance on the outer shield of the rf cable at a frequency of rf signals carried on at least one inner conductor of the cable.
Life Services, Llc


07/16/15
20150200460 

Dual polarized array antenna with modular multi-balun board and associated methods


An array antenna includes a modular, multi-layer, multi-balun board structure for use in feeding a dual polarization radiating element. In some embodiments, contacts on a multi-balun board structure may be directly conductively coupled to corresponding feed points of a dual polarization radiating element during antenna assembly.
Raytheon Company


07/09/15
20150194736 

Quasi-yagi-type antenna


An apparatus includes a first ground plane, a second ground plane, an antenna, and a balun coupled to the antenna. The balun is disposed between the first ground plane and the second ground plane..
Qualcomm Incorporated


07/09/15
20150194731 

Low profile dipole antenna assembly


A compact, low profile dipole antenna assembly includes first and second linear radiating elements that form the positive and negative sides of the dipole antenna, and a balun that extends in parallel with the second radiating element, i.e., the negative side of the dipole antenna. The second radiating element is connected to ground at one end and is an open circuit at an opposite end.
Novatel Inc.


06/18/15
20150171816 

Balun


There is disclosed a balun for dividing an input electrical signal to produce first and second output electrical signals which are substantially out of phase, the balun including: an input port for receiving the input electrical signal; an input line for coupling the input electrical signal to a slotline; and an output line for coupling the first and second output electrical signals to, respectively a first output port and a second output port, the output line having a junction with the slotline; wherein the slotline couples the input electrical signal to the junction, and the junction acts as a divider to produce the first and second electrical signals; in which at least one of the input line, slotline and output line has a width and a length wherein the width varies over the length.. .
Bae Systems Plc


06/18/15
20150168515 

Radio frequency coil unit and magnetic resonance imaging apparatus


According to one embodiment, a radio frequency coil unit includes cables, radio frequency coil elements and balun circuits. The cables correspond to channels.
Toshiba Medical Systems Corporation


06/18/15
20150164586 

Ablation devices with dual operating frequencies, systems including same, and methods of adusting ablation volume using same


An ablation device includes a feedline including an inner conductor having a distal end, an outer conductor coaxially disposed around the inner conductor, and a dielectric material disposed therebetween, an elongated electrically-conductive member longitudinally disposed at the distal end of the inner conductor and having a proximal end, a first balun structure disposed over a first portion of the outer conductor and positioned so that a distal end of the first balun structure is located at a first distance from the proximal end of the electrically-conductive member and a second balun structure disposed over a second portion of the outer conductor and positioned so that a distal end of the second balun structure is located at a second distance from the proximal end of the electrically-conductive member.. .
Covidien Lp


06/11/15
20150162879 

Wideband active balun lna topology with narrow-band filtering and noise cancelling


The present invention provides a wideband active balun lna topology with narrow-band filtering and noise cancelling. The amplifier includes three transconductance stages, a feedback network, and a load.
Montage Technology (shanghai) Co., Ltd.


06/11/15
20150157403 

Electrosurgical devices having dielectric loaded coaxial aperture with distally positioned resonant structure and manufacturing same


An electrosurgical device for directing energy to a target volume of tissue includes a coaxial feedline having an inner conductor, an outer conductor and a dielectric material disposed therebetween. A proximal cylindrical dielectric sleeve is coupled to the inner conductor at a distal end of the coaxial feedline.
Covidien Lp


05/28/15
20150145745 

Balun


According to the invention there is provided a balun including: a slotline which is coupled to an input line and an output line, in which at least a portion of the slotline is sandwiched between a first and a second layer of dielectric material.. .
Bae Systems Plc


05/21/15
20150137869 

Mixing circuit


A balun converts a single-ended radio-frequency signal into differential signals. A differential matching circuit outputs a maximum-level positive-phase output signal at a lower or higher frequency than the center frequency and outputs a maximum-level reverse-phase output signal at a higher or lower frequency than the center frequency.
Panasonic Intellectual Property Management Co., Ltd.


05/14/15
20150130539 

Quasi-differential rf power amplifier with high level of harmonics rejection


A quasi-differential amplifier with an input port and an output port. The amplifier has a phase shifter network with a first port connected to the input port, a second port, and a third port.

05/07/15
20150123864 

Antenna elements and array


Antenna elements are described that may include a radiator, a feeding portion, a first impedance transformer, a balun, and a second impedance transformer. The first impedance transformer, balun, and second impedance transformer may be disposed above a ground plane of an antenna array to reduce a bulk of the array.
Si2 Technologies, Inc.


04/30/15
20150116176 

Dipole antenna and wireless terminal device


Embodiments of the present invention disclose a dipole antenna and a wireless terminal device, which relate to communications technologies and enable an antenna to have a relatively high performance and a relatively low production cost. The dipole antenna includes a first radiation arm, a second radiation arm, and a balun.
Huawei Device Co., Ltd.


04/23/15
20150109059 

Distributed quality factor adjustment


A system includes a differential circuit, multiple cross-coupled transconductance circuits. In some implementations, the differential circuit may include an inductor coil in a balun or transformer.
Broadcom Corporation


04/16/15
20150102974 

Compact antenna with dual tuning mechanism


An antenna, including at least one set of conductive arms radiative at a resonant frequency, the at least one set of conductive arms including a first conductive arm having a first terminus and a second conductive arm having a second terminus, the first and second termini being closely spaced so as to form a capacitive gap therebetween, the capacitive gap having a width, a feed connection located on the first conductive arm, a first electrical length being defined along the first conductive arm between the feed connection and the first terminus, a ground connection located on the second conductive arm, a second electrical length being defined along the second conductive arm between the ground connection and the second terminus, the resonant frequency depending at least on the width of the capacitive gap and on the first and second electrical lengths, a total electrical length along the set of conductive arms between the first and second termini being less than or equal to half of a wavelength corresponding to the resonant frequency, and a balun coupled to the first and second conductive arms.. .
Galtronics Corporation Ltd.


04/16/15
20150102971 

Bi-polarized broadband annular radiation unit and array antenna


A bi-polarized broadband annular radiation unit, for being installed on a metal reflective plate thus constituting a communication antenna and defining an annular construction by two pairs of orthogonally polarized dipoles, includes two pairs of orthogonally polarized dipoles, each dipole comprising two symmetrical unit arms of a single line sheet shape, one end of a unit arm being facing to a corresponding end of the other unit arm, and a distal end of each unit arm of at least one pair of dipoles is provided with a loading line; and a plurality of balun arms feeding power to and supporting respective dipoles, each balun arm including two parallel balun lines, and the top ends of the two balun lines being connected with corresponding ends of the two unit arms of a corresponding dipole. Each unit arm and the balun line and/or loading line connected to the same unit arm are made by sheet metal stamping forming process or casting process..
Comba Telecom System (china) Ltd


04/02/15
20150092892 

Single phase differential conversion circuit, balun, switch, and communication device


Provided with one or more first transistors of a first conductivity type each including a gate, a source, and a drain, the gate being connected to an input terminal, the source being configured to be connected to a first voltage source, the drain being connected to an output node, one or more second transistors of a second conductivity type each including a gate, a source, and a drain, the gate being connected to the input terminal, the source being configured to be connected to a second voltage source, the drain being connected to the output node, a first resistor that is inserted and connected between the input terminal and the output node, a first output terminal that is connected to the input terminal, and a second output terminal that is directly or indirectly connected to the output node.. .
Sony Corporation


03/12/15
20150070234 

High-band radiators in moats for basestation antennas


A high-band radiator of an ultra-wideband dual-band basestation antenna is disclosed. The high-band radiator comprises at least one dipole, a feed stalk, and a tubular body made of conductive material and having an annular flange.
Andrew Llc


03/05/15
20150061766 

Wideband inductor-less balun-lna with improved pickup noise rejection


An inductor-less balun low-noise amplifier (lna) includes a cross-coupled network coupled between first and second input terminals and first and second summing nodes. The cross-coupled network may include: a first non-inverting gain stage coupled between the first input terminal and the first summing node; a first inverting gain stage coupled between the first input terminal and the second summing node; a second non-inverting gain stage coupled between the second input terminal and the second summing node; and a second inverting gain stage coupled between the second input terminal and the first summing node.
Broadcom Corporation


02/12/15
20150042340 

Apparatus and amplifying a radio-frequency signal


The present invention provides an apparatus and a method for amplifying a radio-frequency signal and an mri system comprising the apparatus. An aspect of the present invention proposes an apparatus for amplifying a radio-frequency (rf) signal comprising: a magnetically insensitive input balun (10) for converting the rf signal in unbalanced format into balanced signals; at least two groups of mosfets, each group including at least one mosfet (30, 40), for respectively amplifying the balanced signals in a push-pull way; a magnetically insensitive output balun (60) for converting the amplified balanced signals into an unbalanced format; a magnetically insensitive input matching network (20, 20′) for matching input impedances of the at least two groups of mosfets with output impedances of the magnetically insensitive input balun (10); a magnetically insensitive output matching network (50, 50′) for matching output impedances of the at least two groups of mosfets with input impedances of the magnetically insensitive output balun (60); a magnetically insensitive protection circuit (70, 70′) for protecting a direct current (dc) power supply which provides dc for driving the at least two groups of mosfets from the amplified balanced signals.
Koninklijke Philips N.v.


02/05/15
20150038095 

Transmit architecture for wireless multi-mode applications


In one embodiment, an apparatus includes an upconversion unit configured to upconvert a baseband signal to a radio frequency (rf) signal. A plurality of baluns for a plurality of wireless bands are provided.
Marvell World Trade Ltd.


02/05/15
20150034304 

Hydrocarbon resource heating system including balun having a ferrite body and related methods


A system for heating hydrocarbon resources in a subterranean formation having a wellbore therein includes a coaxial transmission line, a balun, and a radio frequency (rf) antenna coupled together in series and configured to be positioned in the wellbore so that the rf antenna heats the hydrocarbon resources in the subterranean formation. The coaxial transmission line includes an inner conductor and an outer conductor surrounding the inner conductor.
Harris Corporation


02/05/15
20150034303 

Hydrocarbon resource heating system including sleeved balun and related methods


A system for heating hydrocarbon resources in a subterranean formation having a wellbore therein includes a coaxial transmission line, a balun, and a radio frequency (rf) antenna coupled together in series and configured to be positioned in the wellbore so that the rf antenna heats the hydrocarbon resources in the subterranean formation. The coaxial transmission line includes an inner conductor and an outer conductor surrounding the inner conductor.
Harris Corporation


01/08/15
20150008926 

Non-cylindrical cable balun design for rf coils


A non-cylindrical cable balun design having reduced space requirements and that provides for a lighter-weight rf coil is disclosed. The balun includes a balun shell having a non-cylindrical profile, a dielectric foam positioned within the balun shell so as to fill an interior volume defined by the balun shell, and one or more capacitors formed on the balun shell.
General Electric Company


12/25/14
20140374616 

Imaging antenna and related techniques


An antenna array includes a plurality of antenna elements. The antenna elements include layers of dielectric material; an antenna inlaid in a top layer of the dielectric material so a surface of the antenna is substantially parallel to an outer surface of the top layer of dielectric material; and a conductive balun, coupled to the antenna, and embedded in one or more layers of the dielectric material.
Raytheon Company


12/18/14
20140368270 

Marchand balun and power amplifier using the same


A marchand balun has a primary transmission line with a width smaller than the two secondary transmission lines. The two secondary transmission lines also have different widths and lengths.
Nxp B.v.


12/11/14
20140361834 

Four lc element balun


A balun includes an unbalanced port having a single-ended terminal, a balanced port having first and second differential terminals, and first and second series resonant lc circuits. The first series resonant lc circuit is connected between the first and second differential terminals, and includes a first element of a first type and one element of a second type connected in series.

11/13/14
20140333387 

Conductor winding and inductors arranged to form a balun having a figure eight shape


A balun including a first conductor winding, a first inductor, a second inductor, a third inductor, and a fourth inductor. The first conductor winding has a figure eight shape including a first loop and a second loop.

11/06/14
20140327491 

Balun circuit using a defected ground structure


Disclosed is a balun circuit using defected ground structure. The balun circuit using a defected ground structure includes: a substrate; a ground surface formed on one surface of the substrate, the ground surface being formed with defect structure in a previously set shape; and two transmission lines formed on the other surface of the substrate opposing the ground surface, and separated from each other, and the defect structure of the ground surface is configured to have open circuit impedance characteristics, and one of the two transmission lines is grounded.

10/30/14
20140320374 

Multi bandwidth balun and circuit structure thereof


A multi bandwidth balun is provided, including a main signal port, a main inductor electrically connected to the main signal port, a first inductor inducted mutually with the main inductor to constitute a first inductor of a first conversion circuit, a first capacitor module connected in parallel to the first conversion circuit, two first signal ports electrically connected to the first capacitor module, a first main capacitor electrically connected to the first signal port and the first capacitor module therebetween, a second inductor inducted mutually with the main inductor to constitute a second inductor of a second conversion circuit, a second capacitor module connected in parallel to the second conversion circuit, two second signal ports electrically connected to the second capacitor module, and a second main capacitor electrically connected to the second signal port and the second capacitor module therebetween.. .

10/30/14
20140320373 

Monopole antenna with a tapered balun


Embodiments are directed to a balun structure comprising: a monopole antenna, and a microstrip coupled to the monopole antenna and comprising a ground plane modified to include at least two arms. Embodiments are directed to a balun structure comprising: a monopole antenna, and a microstrip coupled to the monopole antenna using a stepwise tapered microstrip feed..

10/30/14
20140320230 

Multi-loop transformer having wideband frequency applications


A balun is disclosed that includes a main tank circuit, and at least one auxiliary tank circuit. The main tank circuit includes a primary winding and a secondary winding.

10/23/14
20140312955 

Balun mixer circuits


A single-balanced balun mixer circuit includes a balun with a center tap connected to a differential pair with a tail resistor. The balun receives a first input signal and a second signal at the single-ended input terminal and the center tap, respectively.

10/09/14
20140302807 

Array antenna and related techniques


An antenna array includes a plurality of radiating elements disposed on a layer that is situated above an egg crate structure that is formed of interconnected dielectric panels. In some embodiments, balun circuitry is disposed on at least some of the dielectric panels of the egg crate structure for use in feeding corresponding radiating elements of the array in a balanced manner.

10/09/14
20140300430 

Ultra-broadband planar millimeter-wave mixer with multi-octave if bandwidth


In some embodiments, a system may include a passive uniplanar single-balanced millimeter-wave mixer. In some embodiments, a three-port diode-tee ic forming a mixer core is coupled between an end of a slotline balun and a second coplanar balun.

10/02/14
20140296839 

Step-down coaxial microwave ablation applicators and methods for manufacturing same


Microwave ablation applicators and methods for manufacturing the microwave ablation applicators are disclosed. A microwave ablation applicator includes a feed-line segment, a step-down segment, and a radiator base segment.

10/02/14
20140290934 

Radio frequency heat applicator for increased heavy oil recovery


A radio frequency applicator and method for heating a geological formation is disclosed. A radio frequency source configured to apply a differential mode signal is connected to a coaxial conductor including an outer conductor pipe and an inner conductor.

10/02/14
20140290830 

Step-down coaxial microwave ablation applicators and methods for manufacturing same


Microwave ablation applicators and methods for manufacturing the microwave ablation applicators are disclosed. A microwave ablation applicator includes a feed-line segment, a step-down segment, and a radiator base segment.

09/18/14
20140276739 

Microwave energy-delivery device and system


A microwave ablation device including a cable assembly configured to connect a microwave ablation device to an energy source and a feedline in electrical communication with the cable assembly. The microwave ablation device further includes a balun on an outer conductor of the feedline, and a temperature sensor on the balun sensing the temperature of the balun..

09/18/14
20140266469 

Current re-using wideband low-noise active balun


Some aspects of the present disclosure relate to a low-noise amplifier (lna) having a balun configuration. The lna includes a dc current path coupling a first dc supply node to a second dc supply node.

09/18/14
20140266443 

High-frequency, broadband amplifier circuit


According to one embodiment, a high-frequency, broadband amplifier circuit includes two drive elements, a matching circuit, a balun circuit, a power supply, and a power supply circuit. The matching circuit includes two pattern circuits.

09/18/14
20140259641 

Microwave energy-delivery device and system


A method of manufacturing a microwave ablation device, the method including applying a balun short circumferentially about an outer conductor of a coaxial feedline and applying a dielectric material circumferentially about the outer conductor of the coaxial feedline and in contact with the balun short to form a balun. The method further including extending a temperature sensor along the coaxial feedline such that the sensor contacts the balun short, securing the temperature sensor to the coaxial feedline with a first heat shrink material, and securing the dielectric material, balun short, and temperature sensor in contact with each other and to the coaxial feedline using a second heat shrink material..

09/11/14
20140253246 

Wideband doherty amplifier network


The present invention is directed to an amplifier system that includes a main amplifier configured to amplify and a peak amplifier that operates only in a high power mode. An impedance matching network is coupled to at least the peak power amplifier.

09/04/14
20140247096 

Balun printed on substrate


A balun includes an input port, a first output port, a second output port and a coupling microstrip group including an input line connected to the input port, a first output line connected to the first output port, a first coupling line, a second output line connected to the second output port and a second coupling line. The input line includes a first coupling section connected to the input port, a second coupling section opposite to the first coupling section and a connecting section connected between the first coupling section and the second coupling section.

08/28/14
20140240059 

Integrated receive filter including matched balun


A duplexer includes a transmit filter and an integrated receive filter configured to filter a receive signal from an antenna. The integrated receive filter includes a receive filter portion having multiple acoustic resonator filter elements and a matched balun configured to convert a single-ended input signal, received at a single-ended input of the matched balun from a single-ended output of the receive filter portion, to a differential output signal.

08/28/14
20140240056 

Symmetric baluns and isolation techniques


Wideband balun having good performance characteristics for use in feeding differential antenna elements in array antennas, balanced amplifier circuits and other applications is described. Also described is a common mode isolation circuit suitable for integration with the balun..

08/21/14
20140233671 

Signal generation device


A device for generating a signal, including: a balun; and a circuit capable of summing up, on a first access terminal of the balun, currents representative of signals received on first input terminals of the device, and on a second access terminal of the balun, currents representative of signals received on second input terminals of the device.. .

08/21/14
20140232589 

Receiver circuit, phased-array receiver and radar system


A receiver circuit, comprises an input balun circuit comprising a balanced balun output and being capable of receiving rf signals, an input amplification circuit comprising a balanced amplifier input and a balanced amplifier output, a single balanced in-phase mixing circuit comprising a first unbalanced rf mixer input and a balanced in-phase mixing frequency input, and a single balanced quadrature mixing circuit comprising a second unbalanced rf mixer input and a balanced quadrature mixing frequency input. The balanced amplifier input is connected to the balanced balun output, a first terminal of the balanced amplifier output is connected to provide an amplified rf signal to the first unbalanced rf mixer input and a second terminal of the balanced amplifier output is connected to provide a phase-shifted amplified rf signal to the second unbalanced rf mixer input..



Balun topics: Differential Signal, Magnetic Field, Circuit Board, Coaxial Cable, High Speed, Transceiver, Control Unit, Protection Circuit, Magnetic Resonance Imaging, Modulation, Leaky Wave Antenna, Amplitude Modulation, Antenna Array, Acoustic Wave, Transmission Path

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