70 results about "Branch line coupler" patented technology

High-frequency couplers and coupling techniques are described utilizing artificial composite right / left-handed transmission line (CRLH-TL). Three specific forms of couplers are described; (1) a coupled-line backward coupler is described with arbitrary tight / loose coupling and broad bandwidth; (2) a compact enhanced-bandwidth hybrid ring coupler is described with increased bandwidth and decreased size; and (3) a dual-band branch-line coupler that is not limited to a harmonic relation between the bands. These variations are preferably implemented in a microstrip fabrication process and may use lumped-element components. The couplers and coupling techniques are directed at increasing the utility while decreasing the size of high-frequency couplers, and are suitable for use with separate coupler or couplers integrated within integrated devices.

A balanced power amplifier that includes two or more power amplifiers with equal but phase-shifted signal paths. Balanced power amplifiers need to achieve phase delay and also need to perform power combining. A power amplifier includes at least one quadrature hybrid (also referred to as a branch-line coupler). The quadrature hybrid is utilized for multiple functions, such as power dividing, power combining, impedance matching or a combination thereof. This implementation with the quadrature hybrid reduces the amount of area needed to implement the balanced power amplifier.

A combined microwave sensor comprises metal ground at the bottom layer, dielectric at the middle layer, an input port, an output port I, a branched line coupler, a power divider, an open resonant ring, a microstrip line I and a microstrip line II, wherein the input port, the output port I, the branched line coupler, the power divider, the open resonant ring, the microstrip line I and the microstrip line II are arranged in the top layer. The input port and the output port I are connected with a vector network analyzer. The output side of the branched line coupler is provided with an isolated port and the output port I. The input end of the power divider is connected with the input port. The output port II and the output port III are connected with an annular directional coupler through a microstrip line. The open resonant ring is arranged between the power divider, the branched line coupler and the two microstrip lines. The combined microwave sensor has advantages of effectively eliminating background noise, realizing testing for weak background signals, and ensuring large offset of the sensor resonant frequency through small disturbance of the tested object. Therefore the combined microwave sensor provided by the invention has higher sensitivity and higher accuracy in dielectric constant measurement and can be used in high-sensitivity testing with small dielectric constant change.

An integrated receiver circuit includes aphase locked loop circuit (21) with a voltage controlled oscillator (VCO) (25) and a quadrature generator circuit (29) which uses hybrid-branch line coupler circuits (27, 28) coupled to buffered VCO outputs, where the hybrid-branch line coupler circuits (27, 28) are tuned by same control voltage (25a) that controls the VCO (25). By replicating the VCO core circuitry in each hybrid-branch line coupler circuit (27, 28) under common control of a control voltage, calibrated quadrature signals are generated that have the same frequency as the phase locked loop circuit (21).

The invention provides a hybrid coupler with reconfigurable frequency and phase and a design method thereof. The coupler is formed by four microstrip lines parallel in pairs, four port impedance match wires, four blocking capacitors, four radio frequency choke coils, four varactors, a medium substrate, and a metal ground, the four microstrip lines and the four port impedance match wires are used for forming a basic branch line coupler, and the varactors are used for realizing the reconfigurable function of the phase and the frequency of the coupler. According to the hybrid coupler and the design method thereof, the directional coupler with reconfigurable phase and frequency is firstly proposed, a power-dividing device and a phase-shifting device are combined, and the hybrid coupler can be widely applied to beam-forming and antenna array systems.

The invention discloses a large-wide-angle low-standing-wave microstrip frequency sweep antenna based on a suspended strip slow-wave line. One end of a suspended strip meander line is used for feeding; the middle of the suspended strip meander line is connected with a plurality of narrow-edge directional couplers, wide-edge directional couplers and broadband circular branch line couplers; the coupling port of each coupler is connected with a section of compensation line; a separating port is connected with a matched load; each compensation line is also connected to an ultra-wideband small-size microstrip dipole antenna; and the tail end of the suspended strip meander line is directly fed into one ultra-wideband small-size microstrip dipole antenna through one section of compensated line. According to the invention, the standing wave is increased; the performance of the frequency sweep antenna is enhanced; the scanning airspace of the frequency sweep antenna is greatly widened; and the structure is simple.

The invention discloses a compensation type spiral microstrip resonance unit which includes an input port, an output port, a spiral microstrip line and a central microstrip line, wherein the spiral microstrip line is symmetrically disposed taking the central microstrip line as symmetrical line, and the spiral microstrip line is led out from the center of the central microstrip line and is a spiral microstrip open circuit line, one end of which is folded inwards; the invention further includes a long annular belt shaped open circuit compensation microstrip line and a short annular belt shaped open circuit compensation microstrip line which are led from the center of the central microstrip line, and which are disposed at the same side of the central microstrip line. The invention further discloses a branch-line coupler based on the compensation type spiral microstrip resonance unit. The resonance unit is transmission line at fundamental frequency, and has strong restraining effect on the transmitted signal at the second order and the third order harmonic position. The branch-line coupler comprised by the compensation type spiral microstrip resonance unit has advantages of harmonic suppression, small circuit area, low insertion loss and so on.

A Doherty amplifier (100) for amplifying an input signal to an output signal, the Doherty amplifier (100) comprising: a main amplifier (110) for receiving a first signal and for amplifying the first signal to generate a first amplified signal; a first peak amplifier (112) for receiving a second signal and for generating a second amplified signal, the first peak amplifier (112) only operating when the second signal has reached a first threshold power, the first and second signal split from the input signal; and output circuitry (106) to combine the first and second amplified signals to generate an output signal having an operating bandwidth, the output circuitry (106) comprising inductors (124, 126) arranged in the format of a branch line coupler, the inductors (124, 126) coupled to the output parasitic capacitances of the main (110) and peak amplifier (112).

The microwave DPDT switch according to the present invention is composed of (1) a branch line coupler having three gaps at the branch lines among two input ports and two output ports, and (2) three SPST switches locating at the three branch line gaps to transmit input signals to the output ports. The microwave divide / through switch according to the present invention, dividing or transmitting input signals to the output ports, is composed of (1) a 90° branch line coupler having two gaps at the branch lines among two input ports and two output ports, and (2) two SPST switches locating at the two branch line gaps to transmit input signals to the output ports. The high efficient power amplifier according to the present invention is composed of (1) the two microwave divide / through switches, (2) two power amplifiers, connected with the two microwave divide / through switches, to amplify the signal power transmitted from the first microwave divide / through switch, and (3) a half-wavelength transformer, connected to an output terminal of one of the power amplifiers, to delay the phase of the amplified signal by a half-wavelength.

High-frequency couplers and coupling techniques are described utilizing artificial composite right / left-handed transmission line (CRLH-TL). Three specific forms of couplers are described; (1) a coupled-line backward coupler is described with arbitrary tight / loose coupling and broad bandwidth; (2) a compact enhanced-bandwidth hybrid ring coupler is described with increased bandwidth and decreased size; and (3) a dual-band branch-line coupler that is not limited to a harmonic relation between the bands. These variations are preferably implemented in a microstrip fabrication process and may use lumped-element components. The couplers and coupling techniques are directed at increasing the utility while decreasing the size of high-frequency couplers, and are suitable for use with separate coupler or couplers integrated within integrated devices.

The invention discloses a terahertz image frequency suppression frequency mixing circuit comprising a radio frequency 3dB branch waveguide directional coupler, terahertz fundamental wave frequency mixers, a local oscillator H-plane waveguide power divider and an intermediate frequency branch line coupler. The radio frequency 3dB branch waveguide directional coupler equally divides the entered radio frequency signal into two paths of mutually orthogonal signals to be coupled to the two terahertz fundamental wave frequency mixers through the waveguide. The local oscillator H-plane waveguide power divider couples a local oscillator driving signal to the two terahertz fundamental wave frequency mixers through the waveguide, intermediate frequency signals generated in the two terahertz fundamental wave frequency mixers enter the intermediate frequency branch line coupler and then the separated high sideband intermediate frequency output and low sideband intermediate frequency output can be obtained. With application of the principle, the image frequency can be suppressed in the terahertz band, the receiver noise factor can be optimized, the image frequency can be prevented from interfering a terahertz receiver system to generate false correspondence and the error rate of the system can be reduced.

The invention discloses a double-dimension reconfigurable orthocoupler. The double-dimension reconfigurable orthocoupler comprises a dielectric plate, an improved branch coupler, a frequency modulation bias unit and a power-division-ratio adjusting bias unit, wherein the improved branch coupler adopts a matts structure and consists of a basic branch line coupler and crossed-shaped microstrip lines; the frequency modulation bias unit consists of four frequency modulation bias circuits; the power-division-ratio adjusting bias unit consists of two power-division-ratio adjusting bias circuits, wherein a first microwave signal is accessed to the input port of the basic branch line coupler; each frequency modulation bias circuit adjusts equivalent electrical lengths of series arms and parallel arms based on a first preset bias voltage and the first microwave signal; meanwhile, each frequency modulation bias circuit adjusts equivalent impendence of the parallel arms based on a second preset bias voltage and the first microwave signal; and the output port outputs a second microwave signal with a preset center frequency and preset power-division ratio. Based on the double-dimension reconfigurable orthocoupler, continuous adjustment of the center frequency and the power-division ratio is realized, and the purposes of reconfigurable center frequency and power-division ratio, signal quadrature output and easy processing are achieved.

The invention discloses a balance-type branch line coupler with a filter function and solves the technical problem that a branch line coupler in the prior art cannot inhibit environmental noise well, does not has functions of power distribution and filter of differential signals and is inconvenient for being connected with a differential device due to the fact that only one end is designed on the branch line coupler. The balance-type branch line coupler comprises four resonators (10, 20, 30 and 40) and two coupling microstrip lines (50 and 60), positive and negative signal transmission ends of each of the first and third resonators (10 and 30) are connected with positive and negative signal transmission lines of the first coupling microstrip line (5), positive and negative signal transmission ends of the first and second resonators (10 and 20), positive and negative signal transmission ends of each of the second and fourth resonators (20 and 40) are connected with positive and negative signal transmission lines of the second coupling microstrip line (6), and the positive and negative signal transmission ends of the third and fourth resonators (30 and 40) are communicated. The balance-type branch line coupler has the advantage that power distribution, filter and common-mode signal suppression of the differential signals are realized.

The invention discloses a predistortion linearizer. The predistortion linearizer comprises a first branch line coupler which is configured for inputting a signal by a first input end in a direction equal to an input signal, then directly outputting the signal by a first straight through end and outputting the signal from a first coupling end, wherein the signal output from the first coupling end has uniform amplitude with the signal output from the first straight through end, the direction of the signal output from the first coupling end is opposite to that of the signal output from the first straight through end. The predistortion linearizer also comprises a first nonlinearity generator which is configured for generating a curve of which amplitude and phase are extended at the same time and outputting a first way of signal; a second nonlinearity generator which is configured for generating the curve of which amplitude and phase are extended at the same time and outputting a second way of signal; and a power divider which is configured for synthesizing the first way of signal and the second way of signal and outputting the synthesized signal. Through application of the predistortion linearizer to linearity of a power amplifier, such as a travelling wave tube, the linearity can be improved greatly, and the predistortion linearizer has important engineering application value.

The invention relates to a speed-measuring radar system with a function of distinguishing a vehicle direction, and the system comprises a frequency source, wherein the frequency source is connected to the input end of a branch line coupler; a transceiving antenna is connected to the branch line coupler; the coupling port of the branch line coupler is respectively connected to a first power divider and a second power divider; the first power divider is used for outputting in two paths; one path is connected to a first frequency mixer through a 90-degree delay line; the other path is connected to a second frequency mixer; and the output end of the second power divider is respectively connected to the first and second frequency mixers. The speed-measuring radar system provided by the invention is low in production cost, compact in structure, small in volume, high in stability, excellent in property and reliable in circuit property; compared with other speed-measuring radar systems, the speed-measuring radar system has the characteristics of low cost and high efficiency; and the speed-measuring radar system can be used for detecting the overspeed of a vehicle and can be widely applied to a police snap-shooting speed-measuring system.

The invention discloses a branch line coupler and a manufacture method thereof. The branch line coupler comprises a first balanced port, a second balanced port, a third balanced port and a fourth balanced port, wherein the first balanced port is connected with the fourth balanced port via a quarter-wave transmission line with an impedance of Z2; the first balanced port is connected with the second balanced port via a quarter-wave transmission line with an impedance of Z3; the second balanced port is connected with the third balanced port via a quarter-wave transmission line with an impedance of Z2; the third balanced port is connected with the fourth balanced port via a quarter-wave transmission line with an impedance of Z3; each balanced port comprises two single ports; the two single ports of each balanced port are connected via a half-wave transmission line with an impedance of Z1. Beneficial effects of the invention: the branch line coupler has power distribution and phase distribution functions for the differential mode signal and can effectively suppress the common-mode signal.

The invention discloses a charge pump rectifier in the field of wireless charging. The charge pump rectifier comprises a Branch-Line coupler connecting an antenna and a charge pump, wherein the chargepump comprises a first voltage multiplier and a second voltage multiplier which are same in structure and opposite in diode connection sequence; a negative potential difference V- output by the firstvoltage multiplier is equivalent to a positive potential difference V+ output by the second voltage multiplier; an input end of the Branch-Line coupler is connected with the antenna; and two output ends of the Branch-Line coupler are respectively connected with an input end of the first voltage multiplier and an input end of the second voltage multiplier.

The invention relates to a substrate integrated gap waveguide coupler design method. A coupler structure is formed by the close connection of an upper dielectric plate (5) and a lower dielectric plate(6). The upper surface of the upper dielectric plate (5) is provided with a grounding metal layer through printing, and the lower surface of the upper dielectric plate (5) is provided with a couplingmicrostrip line (13) through printing. The upper surface of the lower dielectric plate (6) is provided with an H-shaped coupling microstrip line (12) through printing, and the H-shaped coupling microstrip line (12) and a metal via hole (11) form an H-bridge transmission ridge. Two sides of the H-bridge transmission ridge are each provided with a first EBG structure array (9), and the center of the H-bridge transmission ridge is provided with a second EBG structure array (10), wherein the lower surface is printed with a metal layer. The method provided by the invention is improved from the theoretical basis of a microstrip branch line coupler. The waveguide coupler is easy for integration, is small in size, is wide in bandwidth, is small in loss, and is higher in isolation degree.

This invention relates to a high temperature superconduction plane group time delay equalizer characterizing in including a high temperature superconduction microstrip line branch line coupler and two high temperature superconduction microstrip line reflection filters, in which, the coupler includes four ports, the first one is a signal input end and an output end connecting to the filter, the second is a signal output end, the third is connected with the first reflection filter and the fourth is connected with the second reflection filter, which can greatly reduce the group time delay difference when signals pass through the filters and reduce the loss of signals.

The invention discloses a planar balanced frequency doubler, which comprises a micro-strip line network and two diodes. The micro-strip line network is composed of a multiplexer network, a branch linecoupler and a phase shift network. The two diodes are a first diode and a second diode respectively. The traditional branch line coupler is improved into a balun needed to complete balanced frequencydoubling. Therefore, a planar balanced frequency doubler which can be used in the terahertz band is realized, the size and weight of the frequency doubler can be greatly reduced, and the frequency doubler can be directly integrated with other planar circuits.

The invention discloses a high-efficiency rectification circuit. The high-efficiency rectification circuit comprises an upper layer microstrip structure, an intermediate medium substrate, and a bottom layer metal floor, the upper layer microstrip structure is printed on the upper surface of the intermediate medium substrate, and the bottom layer metal floor is printed on the lower surface of the intermediate medium substrate. The high-efficiency rectification circuit is characterized in that the upper layer microstrip structure is formed by a two-segment branch line coupler, a first sub-rectification circuit, and a second sub-rectification circuit, one isolation terminal of the two-segment branch line coupler is connected to the ground, and the two-segment branch line coupler is connected with the first sub-rectification circuit and the second sub-rectification circuit. According to the high-efficiency rectification circuit, the two-segment branch line coupler whose isolation terminal is connected to the ground is employed to re-inject a part of reflection waves generated by the two sub-rectification circuits due to impedance mismatch to the sub-rectification circuits for utilization, the rectification efficiency of the whole circuit is improved, better match between the whole rectification circuit and an antenna is realized, and the energy loss of the system is reduced.

The invention relates to a flexible broadband branch line coupler capable of suppressing triple harmonic waves. The coupler can be applied to the scene having requirement for the bending performance of the branch line coupler. The bandwidth in the passband is wide and the insertion loss is low. Compared with the method of additionally arranging the filter to suppress the harmonic waves, the coupler is simple in structure and easy to design; besides, the defect ground is additionally arranged in the designed coupler so that high microstrip line width can be realized and processing and implementation are easy.

The invention discloses a microring resonator based binary optical full adder which comprises three microring resonators of different structures and five Y-shaped branch-line couplers, is input with three electrical pulse sequences to be calculated and outputs optical pulse sequences after calculation with an addition with a carry flag. The binary optical full adder is completely compatible with aCMOS technology, so that the microring resonator based binary optical full adder is small in size, low in power consumption, rapid in speed, good in extensibility and convenient in integration and play an important role in a photon computer.

The invention discloses a high distribution ratio reconfigurable power divider which comprises a metal ground plate and a dielectric substrate, the dielectric substrate being arranged on the metal ground plate, and also comprises a 3dB Wilkinson power divider, a 3dB branch wire coupler, a first pi-shaped equivalent transmission line and a second pi-shaped equivalent transmission line arranged on the dielectric substrate; the 3dB Wilkinson power divider is connected with the first pi-shaped equivalent transmission line and the second pi-shaped equivalent transmission line, and the first pi-shaped equivalent transmission line and the second pi-shaped equivalent transmission line are connected with the 3dB branch wire coupler. According to the power divider provided by the invention, high distribution ratio of output power can be achieved, and the distribution ratio is continuously reconfigurable in a large range.

The invention discloses a balanced filter branch line coupler, and aims at solving the technical problems that the balanced filter branch line coupler in the prior art is of a dual-layer design and is complicated in structure and high in cost, and the frequency selectivity needs to be improved. The coupler comprises eight single ports (1-8), four half-wave coupled transmission lines (10, 20, 30 and 40) for connecting the single ports, and four quarter-wave uncoupled transmission lines (50, 60, 70 and 80) for connecting differential ports, wherein the single ports (1 and 2) form the differential port (A); the single ports (3 and 4) form the differential port (B); the single ports (5 and 6) form the differential port (C); and the single ports (7 and 8) form the differential port (D). The structure of the coupler is simplified and the processing cost is reduced when power distribution, filter processing and common-mode signal suppression on differential signals are achieved; and the technical effect of higher frequency selectivity can be obtained.

A branch-line coupler suitable for use in mobile devices includes a first, second, third, and fourth ports, respectively acting as input, transmitted, coupled, and isolated port. A first, second, third, and fourth connection parts are connected to the ports and transmission lines. First and second bent transmission lines are electrically connected between first and second ports. Third and fourth bent transmission lines are electrically connected between third and fourth ports. A first long strip transmission line is electrically connected between the first port and the fourth port. A second long strip transmission line is electrically connected between the second port and the third port. The branch-line coupler occupies a small area and has high performance.

The invention discloses a broad-axial-ratio-beam antenna loaded by a single dielectric, comprising a loading dielectric and a circularly polarized patch antenna. The loading dielectric comprises a dielectric block and an air cavity formed by hollowing the bottom surface. The circularly polarized patch antenna comprises a circular patch, a first dielectric plate, a floor, a second dielectric plateand a single-frequency feed network arranged in turn from top to bottom. The single-frequency feed network comprises a single-frequency branch line coupler, a feed probe, a grounding short circuit pinand a matching resistor. Because a loading dielectric design of a special structure is adopted, the traditional circularly polarized patch antenna achieves a good axial ratio beam broadening effect.In addition, the antenna has the advantages of simple structure, stable gain and small size, and is very suitable for wide application and promotion.

The invention provides a double-frequency microstrip cross branch-line coupler comprising a base, and an input port, a direct-through output port, a coupling output port and an isolation port which are arranged on the base. The double-frequency microstrip cross branch-line coupler also comprises a first microstrip cross joint, a second microstrip cross joint, a third microstrip cross joint and a fourth microstrip cross joint. The first microstrip cross joint is connected between the input port and the direct-through output port. The second microstrip cross joint is connected between the direct-through output port and the coupling output port. The third microstrip cross joint is connected between the coupling output port and the isolation port. The fourth microstrip cross joint is connected between the isolation port and the input port. The conventional 1 / 4 wavelength impedance converter is replaced by a cross resonator model based on the conventional branch-line coupler structure, and the parameter values of corresponding elements are obtained through ABCD matrix analysis deduction and calculation so that port matching and port isolation can be realized, and the double-frequency microstrip cross branch-line coupler also has advantages of large frequency ratio range and small size.

The invention discloses a dielectric characteristic detection device for electric small-scale samples based on near zero transmission. The dielectric characteristic detection device is an asymmetric three-port network, and specifically includes a bottom metal layer, an intermediate dielectric layer and an upper metal strip. The upper metal strip includes a micro-strip Wilkinson power divider, a 90-degree 3dB branch line coupler, two branches, and electric field enhancement stubs loaded on the two branches. The two electric field enhancement stubs constitute the test and reference areas of thedielectric characteristic detection device, and micro fluid passages are loaded in the test and reference areas respectively. When the two micro fluid passages are loaded with the same sample or the device is in a no-load state, the dielectric characteristic detection device will be in a symmetrical balance state, and there will be two transmission zeros. When there is a small difference between the samples loaded by the micro fluid passages, the transmission zero of the dielectric characteristic detection device will change. The device of the invention has the advantages of convenient use, low price and easy integration.