Follow us on Twitter
twitter icon@FreshPatents


Balun patents

      

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




 Dipole antenna with micro strip line stub feed patent thumbnailDipole antenna with micro strip line stub feed
Various embodiments are described that relate to a line feed and a dipole element. The line feed can be supplied directly with a current without a balun.
The Government Of The United States, As Represented By The Secretary Of The Army


 Active balun for wideband applications patent thumbnailActive balun for wideband applications
An active balun uses two inverters to produce a differential output from a single-ended input. A current source supplies current to both inverters and a current sink sinks current from both inverters.
Qualcomm Incorporated


 Method and system for winding transformers to maximize symmetry of the primary and secondary coils patent thumbnailMethod and system for winding transformers to maximize symmetry of the primary and secondary coils
Methods and systems for winding transformers to maximize symmetry of the primary and secondary coils may comprise a transformer with a primary coil and a secondary coil. A first portion of the transformer has at least one turn around a core, and includes twisted pair sections of the primary coil and secondary coil.
Maxlinear, Inc.


 Active balun circuit and transformer patent thumbnailActive balun circuit and transformer
An active balun circuit includes a cg transistor having a source terminal thereof connected to an input terminal and a gate terminal thereof grounded, a cs transistor having a gate terminal thereof connected to the input terminal and a source terminal thereof grounded, an asymmetrical transformer, a first output terminal, and a second output terminal. The asymmetrical transformer includes a primary coil and a secondary coil.
Mitsubishi Electric Corporation


 Electrical energy storage apparatus having a balun patent thumbnailElectrical energy storage apparatus having a balun
The present invention relates to an electrical energy storage apparatus having a plurality of electrical storage cells connected in series and to an inductive balun for balancing the storage cell voltages, wherein the balun has a balancer transformer having separate single coils for the storage cells and has a respective electric switch for each storage cell. Provision is made in accordance with the invention that the coils of the balancer transformer are connected to a pole of the respective storage cell via a respective at least one inductance and a switch connected to the named inductance, with the switch associated with one respective storage cell being connected via a diode to a pole of a storage cell respective arranged upstream or downstream..
Liebherr-components Biberach Gmbh


 Frequency tunable balun patent thumbnailFrequency tunable balun
Systems and method are provided for making a balun's operational bandwidth tunable around multiple distinct center frequencies by using switches to vary the balun's dimensions. An embodiment of the present disclosure uses a pass gate structure for the switches, and the switches connect additional lengths of line in or out of the balun to change its frequency response.
The Government Of The United States Of America, As Represented By The Secretary Of The Navy


 Wideband doherty amplifier circuit with integrated transformer line balun patent thumbnailWideband doherty amplifier circuit with integrated transformer line balun
A doherty amplifier circuit includes an rf input terminal, an rf output terminal, a main amplifier having a first input terminal and a first output driving terminal, and a peaking amplifier having a second input terminal and a second output driving terminal. An output combining network is configured to feed output current from the first and second output driving terminals into a summing node.
Infineon Technologies Ag


 Balun patent thumbnailBalun
The present disclosure relates to a balun suitable for realising a wideband transition in the radio frequency band from an unbalanced transmission line to a balanced transmission line. The balun comprises an input terminal; a two conductor output terminal; and a layered structure comprising a number of conducting layers and dielectric layers alternatingly arranged on top of each other.
Saab Ab


 Dual-band printed omnidirectional antenna patent thumbnailDual-band printed omnidirectional antenna
A microwave antenna assembly is printed on a substrate with a first face and an opposing second face. The assembly includes at least one antenna disposed on the front face of the substrate and a balun disposed on the rear face of the substrate.
Cisco Technology, Inc.


 Front end circuit patent thumbnailFront end circuit
A front end circuit includes a switch including a common terminal and a plurality of individual terminals, in which at least two kinds of reception signals of different frequency bands are input to the common terminal, and in which one of the at least two kinds of reception signals is output to an individual terminal selected from the plurality of individual terminals, and in which a non-selected terminal is grounded, and a balun including a first terminal and a second terminal defining unbalanced ports as well as a third terminal and a fourth terminal defining balanced ports. The first individual terminal of the switch is indirectly connected to the first terminal of the balun and the second individual terminal of the switch is indirectly connected to the second terminal of the balun.
Murata Manufacturing Co., Ltd.


Integrated quantized inductor and fabrication method thereof

The present invention relates to rfic process design kits and microelectronics device technologies. More particularly, the invention relates to inductors, transformers, resonators, and electromagnetic (em) guard rings implemented in one chip.

Transconductance optimization using feedback-balun-transformer with inductance degeneration combinations

Disclosed are apparatuses and methods to overcome technology limitations to achieve linearity and efficiency performance suitable for practical wireless communications systems. In an embodiment, an amplifier is provided that superimposes the transconductance from a common source amplifier with inductor degeneration with the transconductance from a common source amplifier without degeneration.
Futurewei Technologies, Inc.

Devices with s-shaped balun segment and related methods

An electronic device may include a wireless circuit, and a coaxial cable device having an s-shaped balun segment coupled to the wireless circuit, and an antenna segment coupled to the s-shaped balun segment. The s-shaped balun segment may include a first inner conductor segment, and a first outer conductor segment surrounding the first inner conductor segment.
Harris Corporation

Wide-band antenna

A multiple-input multiple-output antenna is provided. The antenna may include, but is not limited to, at least one first dipole antenna including a first dipole arm, a second dipole arm, and a balun, the balun including a first bent conductive and a second bent conductive, and at least one second dipole antenna, the at least one second dipole antenna including a third dipole arm, a fourth dipole arm, a u-shaped balun galvantically coupled to the third dipole arm and the fourth dipole arm, a first conductive element galvanically isolated from the third dipole arm, the fourth dipole arm and the u-shaped balun, the first conductive element configured to capacitively couple to the third and fourth dipole arms, and a second conductive element galvanically connected to the u-shaped balun, the second conductive element configured to capacitively couple to the third dipole arm..
Galtronics Corporation Ltd.

Ltcc balun filter using two out-of-phase filtering circuits

The invention presents a ltcc balun filter using two out-of-phase filtering circuits. The ltcc balun filter is comprised of three half-wavelength resonators and grounds which are located on fourteen metal layers.
South China University Of Technology

Electrostatic discharge protection for a balun

A die is mounted in an integrated circuit package. The die includes a balun circuit and an electrostatic discharge (esd) circuit coupled to a ground of the integrated circuit die.
Silicon Laboratories Inc.

Circuits, devices and methods related to combiners for doherty power amplifiers

Circuits, devices and methods related to combiners for doherty power amplifiers. A signal combiner can include a balun transformer circuit having a first coil and a second coil.
Skyworks Solutions, Inc.

Balun device for uhf signals

A balun device for uhf signals includes two conductive connection pads, a printed conductive track and a conductive ground pattern that are formed on a dielectric base plate. The conductive connection pads are connectable respectively with a pair of first signal lines for a pair of differential signals.
Trans Electric Co., Ltd.

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.

Radio frequency antenna assembly for hydrocarbon resource recovery including adjustable shorting plug and related methods

A radio frequency (rf) antenna assembly configured to be positioned within a wellbore in a subterranean formation for hydrocarbon resource recovery may include an rf transmission line and an rf antenna coupled to the rf transmission line. The rf antenna assembly may also include an adjustable balun that may include a tubular balun housing surrounding the rf transmission line and defining a space therebetween.
Harris Corporation

Modified vivaldi antenna with dipole excitation mode

Systems and techniques are provided for a modified vivaldi antenna with dipole excitation mode. An antenna may include a ground plane and a modified vivaldi antenna.

High-selectivity low-loss duplexer

A high-selectivity low-loss duplexing system includes a first duplexer having a first port, a second port, a transmit port and a receive port. A second duplexer has a third port, a fourth port, an inverted transmit port and the receive port.

Output combination of transistors in an mrt radio-frequency power amplifier

A power electronic unit for an amplifier of an imaging magnetic resonance tomography (mrt) system is provided. The power electronic unit includes at least one printed circuit board, on which a plurality of transistors are arranged.

Systems and methods related to linear and efficient broadband power amplifiers

Systems and methods related to linear and efficient broadband power amplifiers. A power amplifier (pa) system can include an input circuit configured to receive a radio-frequency (rf) signal and split the rf signal into a first portion and a second portion.
Skyworks Solutions, Inc.

Balun filter and radio-frequency system

A balun filter utilized for a radio-frequency (rf) system includes a first terminal coupled to an antenna of the rf system for delivering an rf signal; a differential port has a second terminal and a third terminal for delivering a differential signal; a band pass filter coupled between the first terminal and the differential port has a plurality of resonators, each including a surrounding line substantially surrounding an area and forming a loophole on a side of the each resonator; and at least a line segment connected to the surrounding line and disposed separately within the area surrounded by the surrounding line.. .
Wistron Neweb Corporation

Dual-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.

Balun 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.

Baluns 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

Method 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

Multi-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

Electrostatic 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.

Balun 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

High-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.

Interlaced 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.

Ultra-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.

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.

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

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

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.

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

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

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

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

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

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.

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..

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.

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

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

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.

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

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..

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

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

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.

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.

Balun device

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

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

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

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.

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

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.

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

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.. .

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.

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

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

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

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

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.

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

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

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

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.

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

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

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.

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.

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.

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.

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

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.

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

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

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

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

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.

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.

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

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

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

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



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


  • Follow us on Twitter
    twitter icon@FreshPatents

    ###

    This listing is a sample listing of patent applications related to Balun for is only meant as a recent sample of applications filed, not a comprehensive history. There may be associated servicemarks and trademarks related to these patents. Please check with patent attorney if you need further assistance or plan to use for business purposes. This patent data is also published to the public by the USPTO and available for free on their website. Note that there may be alternative spellings for Balun with additional patents listed. Browse our RSS directory or Search for other possible listings.


    2.0353

    file did exist - 4015

    2 - 1 - 97