150results about "Phase shifting networks" patented technology

There is provided a phase shifter circuit of an optical encoder. The phase shifter circuit receives a first signal, a second signal, a third signal and a fourth signal sequentially having a 90-degree phase shift, and includes a first cascaded resistor string, a second cascaded resistor string, a third cascaded resistor string and a fourth cascaded resistor string. The first, second, third and fourth cascaded resistor strings respectively delay the first, third, second and fourth signals by selecting a switch connected at a tap-out node of the first, second, third and fourth cascaded resistor strings to correct phase deviations between incremental signals and an index signal and / or between incremental signals.

The invention discloses a broadband low-power-consumption receiving and transmitting shared phase shifter which comprises a differential signal common port, a frequency sampling and control circuit, a dual-mode orthogonal generation circuit and a passive vector modulation synthesis circuit. The differential signal common port comprises a common input / output port interface of RF + and RF-differential radio frequency signals; the frequency sampling and control circuit is composed of a frequency sampling circuit, a frequency detection circuit and a logic control unit. The dual-mode orthogonal generation circuit is composed of a frequency selection change-over switch, a multi-phase filter, a coupling transformer, a matching network 1 and a matching network 2. The passive vector modulation synthesis circuit is composed of two passive vector modulation arrays and two combining / power dividing circuits.

The invention discloses an ultra-wideband 180-degree phase shift circuit which comprises a radio frequency signal input end, a radio frequency signal output end, an ultra-wideband balun with a center tap and a stub compensation line, a first matching compensation network, a second matching compensation network, a differential signal switch selection circuit and a control circuit. The ultra-wideband balun can realize conversion between a single-ended signal and a differential signal in an ultra-wideband frequency range, a first differential output port of the ultra-wideband balun is connected with one end of the first compensation matching network, and a second differential output port of the ultra-wideband balun is connected with one end of the second compensation matching network; a first differential port of the differential signal switch selection circuit is connected with the other end of the first compensation matching network, and a second differential port of the differential signal switch selection circuit is connected with the other end of the second compensation matching network; and the control circuit is used for controlling the differential signal switch selection circuit to switch and output 0-degree and 180-degree radio frequency signals. According to the invention, low-error phase shift precision can be provided within the frequency range of 2-20GHz and the relative bandwidth of 160%.

The present application relates to the technical field of communications, and in particular to a switch-based compact phase shifter and an integrated phase shifter, which solve the problems of excessive size and costs of existing phase shifters. The switch-based compact phase shifter comprises: a first filter network, the first filter network being an Nth order high-pass filter network; a second filter network, the second filter network being an Mth order low-pass filter network; and a third filter network, the third filter network being an Rth order low-pass filter network; wherein: the first filter network, the second filter network, and the third filter network are connected in parallel by means of a double-pole three-throw switch; and when the second filter network is turned on alone, the insertion phase of the switch-based compact phase shifter is a reference phase; when the third filter network is turned on alone, the insertion phase of the switch-based compact phase shifter is a first phase; when only the first filter network and the second filter network are turned on, the insertion phase of the switch-based compact phase shifter is a second phase; and when only the first filter network and the third filter network are turned on, the insertion phase of the switch-based compact phase shifter is a third phase.

The invention discloses an impedance-invariant vector synthesis phase shifter, an array element and a phased array, and relates to the technical field of phased array design. According to the impedance-invariant vector synthesis phase shifter provided by the invention, two capacitive compensation branches are arranged in each Gilbert unit of a variable gain amplifier, and the capacitive compensation branches are connected to a circuit only when bits are turned off, so that the output impedance of the unit is kept unchanged when the bits are turned on and turned off, and the output impedance of the unit is not changed when the bits are turned off. The phase shifting precision of the phase shifter is effectively improved, the root mean square phase error of the phase shifter is reduced to be within the acceptable range of the engineering field, phase shifting is directly carried out according to the most ideal condition based on IQ orthogonal signals, complicated calibration work is avoided, and the calibration problem of the vector synthesis phase shifter is solved. The invention further provides an array element which adopts the impedance-invariant vector synthesis phase shifter, the continuous time linear equalizer and the current mode attenuator and has the advantage of being convenient to deploy.

A phase shifter (100) with controllable attenuation and a method for controlling the phase shifter is disclosed, the phase shifter (100) comprising a plurality of transmission line segments (120, 220) coupled in series, wherein each said transmission line segment (120, 220) comprises an attenuation circuit (130, 230), selectively couplable between a signal line (126, 222) of the transmission line segment (120, 220) and ground to selectively attenuate a signal propagating through the transmission line segment (120, 220). Each transmission line segment (120, 220) is switchable between a first configuration providing a first phase shift for a signal propagating through the transmission line segment (120, 220) and a second configuration providing a second phase shift, greater than said first phase shift, for a signal propagating through the transmission line segment (120, 220).

The invention discloses a broadband digital phase shifter based on an inductor sharing topology and an equivalent band-pass network, relates to the technical field of microwave integrated circuits, and is suitable for being applied to a Sub-GHz frequency band. The phase shifter comprises a phase shift circuit module and a driving circuit module, and the phase shift circuit module comprises six basic phase shift units including a fine phase shift unit and a coarse phase shift unit which cooperatively realize full-range multi-state phase shift. The fine phase shift unit adopts an inductor sharing topology, so that a phase shift path and a reference path share a circuit architecture, the design is simplified, and the chip layout is optimized; the coarse tuning phase shifting unit adopts an all-pass network as a reference path, a phase shifting path is an equivalent band-pass network formed by cascading a high-pass network and a low-pass network, and the 180-degree phase shifter adopts a double-inductor all-pass network to optimize amplitude-frequency response. And the driving circuit module outputs complementary voltage pairs through the level conversion circuit to drive the switching transistor to realize path switching. The antenna has the advantages of being compact in structure, stable in amplitude, excellent in radio frequency performance and high in adaptability.

The present application discloses a phase shift circuit and a radio frequency microwave system. The phase shift circuit may comprise: a first node circuit, a second node circuit, and a first signal channel and a second signal channel coupled between the first node circuit and the second node circuit, wherein the first node circuit is configured to split an input signal so as to simultaneously output a first differential signal to the first signal channel and a second differential signal to the second signal channel; the first signal channel and the second signal channel are implemented on the basis of a differential circuit architecture, and are configured to respectively perform signal attenuation and / or quadrant transformation on the first differential signal and the second differential signal, so as to implement phase shift; the second node circuit is configured to synthesize a first phase-shifted signal output by the first signal channel and a second phase-shifted signal output by the second signal channel so as to obtain an output signal; and the phase difference between the output signal and the input signal is within the range of 0-360 degrees.

The invention provides a gain-reconfigurable active phase shifter with a low phase error, and relates to the technical field of phase shifters, and the phase shifter comprises a quadrature coupler which converts a radio frequency input signal into a shunt radio frequency signal; the input matching Balun converts the shunt radio frequency signal into a shunt differential signal; the digital control signal received by the phase inversion variable gain amplifier is used for controlling the on-off state of a differential pair in each differential group, and determining a differential combination current corresponding to a differential pair combination in a conduction state based on a shunt differential signal corresponding to each differential pair; the differential combination current is used for representing a gain state corresponding to the differential pair combination; the input impedance and the output impedance of the phase inversion variable gain amplifier in different gain states are kept unchanged; the vector synthesis module determines a phase shift differential signal based on the differential combined current; the output matching Balun converts the phase shift differential signal into a radio frequency output signal. The antenna has a wide gain adjustable range and a low phase error.

Wireless communication circuitry may include active phase shifter circuitry. The active phase shifter circuitry may include a quadrature hybrid coupler and amplifiers coupled to the outputs of the quadrature hybrid coupler. An additional quadrature hybrid coupler may be coupled to the amplifiers.

In some embodiments, the phase adjustment circuit includes a clock generator that is configured to generate a sinusoidal clock signal, and may include a variable amplifier that is configured to receive the clock signal output from the clock generator as an input, output an amplitude-adjusted sinusoidal differential clock signal, and output an amplitude-adjusted in-phase signal. The phase adjustment circuit may include an adder that is configured to output a differential signal obtained by adding the in-phase signal to each of a positive phase side and a negative phase side of the differential clock signal output from the variable amplifier, a differential transmission line that includes two transmission lines configured to transmit the differential signal output from the adder, and a terminal circuit that is configured to terminate the differential transmission line where a signal is output from a terminal of any one of the two transmission lines.

A phase shifter including: an upconversion mixer configured to receive a local oscillator (LO) signal having a LO frequency, and configured to receive and multiply a radio frequency (RF) input signal with the LO signal to produce a modulated signal having two sidebands around the LO frequency, an intermediate IF sideband having frequency below the LO and an image sideband; a filter connected to and configured to receive the modulated signal from the upconversion mixer and to attenuate a range of frequencies corresponding to the image sideband to select and output the intermediate frequency (IF) sideband signal; and a downconversion mixer configured to receive and multiply the IF sideband signal with a phase shifted LO signal to produce an output signal including a phase shifted version of the RF input signal.

Certain aspects of the present disclosure generally relate to electronic circuits, and more particularly, to wireless transmitters. One example apparatus generally includes: an in-phase direct-current (DC) level shifter; a quadrature DC level shifter; an in-phase voltage-to-current (V2I) converter having an input coupled to an output of the in-phase DC level shifter; a quadrature V2I converter having an input coupled to an output of the quadrature V2I converter; a bias control circuit having inputs coupled to the in-phase V2I converter and the quadrature V2I converter, an output of the bias control circuit being coupled to at least one of the in-phase DC level shifter or the quadrature DC level shifter; an in-phase mixer having an input coupled to an output of the in-phase V2I converter; and a quadrature mixer having an input coupled to an output of the quadrature V2I converter.

A millimeter wave (mmW) communication system located on a millimeter wave integrated circuit (MMW-IC) includes a phase shifter selectively connected to a receive path by a first electromagnetic (EM) element and selectively connected to a transmit path by a second EM element, the first EM element configured to receive a transmit signal and configured to receive a receive signal from a low noise amplifier (LNA), the second EM element configured to receive a phase shifted transmit signal or a phase shifted receive signal from the phase shifter, and wherein the second EM element is configured to selectively provide the phase shifted transmit signal to a power amplifier on the mmW-IC and the phase shifted receive signal to receive signal processing circuitry located off of the mmW-IC.

An in-phase / quadrature (l / Q) clock generator (400) is described. The l / Q clock generated includes a poly-phase filter (420) configured to generate a four-phase quadrature clock signal (422) in response to a two-phase quadrature clock signal (406) generated in response to a single-ended input clock signal (402). The l / Q clock generated also includes a phase interpolator (460) configured to generate an output four-phase quadrature clock signal (462) from the four-phase quadrature clock signal. The l / Q clock generated further includes a poly-phase filter tune circuit (430) coupled to an output of the phase interpolator (460). The poly-phase filter tune circuit (430) is configured to generate a control voltage (432) for the poly-phase filter to tune the four-phase quadrature clock signal from the poly-phase filter.

The invention provides a W-band sixteen-channel chip circuit model, and relates to the technical field of radio frequency integrated microsystems. The model comprises an up-conversion frequency mixing circuit, a down-conversion frequency mixing circuit and sixteen channel circuits connected in parallel, and each channel circuit comprises two branch circuits connected in parallel. Wherein one branch is sequentially connected in series with a low-noise amplification circuit, a first six-bit numerical control phase shift circuit, a first driving amplification circuit, a five-bit numerical control attenuation circuit and a second driving amplification circuit, and the other branch is sequentially connected in series with a first power amplification circuit, a second six-bit numerical control phase shift circuit and a second power amplification circuit. The sixteen channel circuits are all connected to an input port of the radio frequency switch circuit S. The up-conversion frequency mixing circuit and the down-conversion frequency mixing circuit are respectively connected with two output ends of the radio frequency switch circuit S. According to the method, the design speed of a complex circuit or system can be increased, and a priori condition is provided for research of a large-scale complex network.

This invention belongs to the field of microwave communication, specifically disclosing a low-parasitic amplitude modulation differential bridge T-type phase shifter. The ground terminals of the differential positive branch phase shifter circuit and the differential negative branch phase shifter circuit are connected to form a differential virtual ground. A first input port is connected to the input terminal of the differential positive branch phase shifter circuit via a matching circuit, and a second input port is connected to the input terminal of the differential negative branch phase shifter circuit via a matching circuit. The output terminal of the differential positive branch phase shifter circuit is connected to the first output port, and the output terminal of the differential negative branch phase shifter circuit is connected to the second output port. A first insertion loss adjustment circuit is connected in parallel between the matching circuit and the phase shifter circuit, and a second insertion loss adjustment circuit is connected in parallel between the phase shifter circuit and the signal output port. This invention reduces the difference in insertion loss between the bridge T-type phase shifter in the reference state and the phase shifter state, thus reducing parasitic amplitude modulation. This invention is applicable to phase control in phased array radar antenna elements.

The application provides a vector synthesis structure of a phase shifter, comprising: a first vector synthesis branch and a second vector synthesis branch; wherein the first vector synthesis branch comprises: a first tail current source, a first DAC bias circuit and a first gate width control circuit, the first tail current source comprises a plurality of first tail current units with gradually increasing width-length ratios, and the first DAC bias circuit is provided with a plurality of first current mirror bias units in correspondence; the second vector synthesis branch comprises: a second tail current source, a second DAC bias circuit and a second gate width control circuit, the second tail current source comprises a plurality of second tail current units with gradually increasing width-length ratios, and the second DAC bias circuit is provided with a plurality of second current mirror bias units in correspondence; the application can improve the linearity of the active phase shifter while ensuring the phase shift precision.

This phase shifter comprises: a high-frequency transmission path I connected between a first output terminal (1b) of an input-side selector switch (1) and a first input terminal (2b) of an output-side selector switch (2); and a low-frequency transmission path II connected between a second output terminal (1c) of the input-side selector switch (1) and a second input terminal (2c) of the output-side selector switch (2).　The high-frequency transmission path I has a high-pass filter (10) and an all-band pass circuit (11) connected in series, and the low-frequency transmission path II has a composite right / left-handed transmission line (20) and an all-band pass circuit (21) connected in series.

The invention provides a broadband gain positive slope amplitude-phase control multifunctional chip for a T / R assembly, which relates to the technical field of radio frequency integrated circuits and comprises a receiving channel, a transmitting channel, an equalization circuit, a numerical control attenuator, a numerical control phase shifter, a transmitting-receiving change-over switch module and a parallel control module. The parallel control module is used for outputting parallel control signals to the numerical control attenuator, the numerical control phase shifter and the transceiving change-over switch module; the equalization circuit is respectively connected with the receiving channel and the transmitting channel through the transmitting-receiving change-over switch module, so that a signal path of the receiving channel and a signal path of the transmitting channel multiplex the equalization circuit, the numerical control attenuator and the numerical control phase shifter; and the equalization circuit is of an on-chip integrated structure and is used for adjusting the gain of the receiving channel and the gain of the transmitting channel to present a positive slope characteristic relative to the frequency in a wide frequency band so as to compensate the frequency attenuation of an external device.

This invention discloses a vector modulation active phase shifter, comprising a coupling network (100) for generating quadrature signals, a first active amplitude control module (200) and a second active amplitude control module (300) composed of a common-source cascode transistor array for adjusting the gain of in-phase and quadrature signals, and a power combining and output matching network (400). The vector modulation active phase shifter includes a phase compensation network (500) located between the coupling network for generating quadrature signals and the active amplitude control module, used to optimize the phase bandwidth of the quadrature signals and improve phase shift accuracy. This invention realizes a wideband, high-precision, directly digitally controlled vector combining active phase shifter with a 360° phase shift range.

The invention provides a compensation capacitor-based T-type phase shift unit and a 6-bit radio frequency phase shifter chip. The compensation capacitor-based T-type phase shift unit comprises a basic T-type phase shift unit and a first compensation capacitor, according to the basic T-type phase shift unit, one end of an inductor serves as an input end to be connected with a drain electrode of a first switch, and the other first inductor serves as an output end to be connected with a source electrode of the first switch; the gate of the first switch is connected with control voltage; the other ends of the two first inductors are connected as a common end; the grid electrode of the second switch is connected with the control voltage and the drain electrode is connected with the common end; a reverse control voltage is connected to the grid electrode of the second switch; source electrodes of the second switch and the third switch are grounded; the third switch, the second inductor and the second compensation capacitor are connected in parallel; and a second switch in the basic T-shaped phase shift unit is connected with the first compensation capacitor in parallel, so that the first compensation capacitor and the second compensation capacitor form a parallel compensation structure. The T-shaped phase shifting unit can effectively solve the problems that an existing T-shaped phase shifting unit is large in area and poor in-band matching performance.

A phase shifter has: an input matching network; a vector modulator connected to the input matching network, the vector modulator configured to alter an amplitude of a signal provided by the input matching network; a bias network coupled to an output of the vector modulator; and a combining circuit connected to the outputs of the vector modulator, the combining circuit configured to generate a first phase ([theta] 1) signal from the outputs of the vector modulator.

The invention provides a K-band receiving component chip circuit device, which belongs to the technical field of radio frequency integrated microsystems and comprises a gallium arsenide low-noise amplification circuit and a silicon-based amplitude-phase multifunctional circuit. The gallium arsenide low-noise amplification circuit is located at the front end of the receiving link; the silicon-based amplitude-phase multifunctional circuit comprises a driving amplification circuit, a numerical control attenuation circuit, a numerical control phase shift circuit and a power distribution circuit. The output end of the gallium arsenide low-noise amplification circuit is connected with the input end of the driving amplification circuit, the output end of the driving amplification circuit is connected with the input end of the numerical control attenuation circuit, the output end of the numerical control attenuation circuit is connected with the input end of the driving amplification circuit, and the output end of the driving amplification circuit is connected with the input end of the numerical control phase shift circuit. The output end of the numerical control phase shift circuit is connected with the input end of the power distribution circuit, and the output end of the power distribution circuit is connected with the COM end. According to the invention, a complex circuit is simplified, the occupation of large-scale simulation on resources is reduced, the simulation time is shortened, and different K-band scenes are adapted.

The application provides a full differential passive digital controlled phase shifter and a communication device, and relates to the technical field of integrated circuits.The full differential passive digital controlled phase shifter comprises a logic controller and a plurality of phase shift units connected with the logic controller; wherein the plurality of phase shift units with different phase offsets are connected in sequence; each phase shift unit comprises a MOS tube and a phase shift device; wherein the control end of the MOS tube is connected with the logic controller; the logic controller is used for generating a switch signal corresponding to each phase shift unit; and the phase shift unit is used for switching the phase shift unit between a reference state and a phase shift state in response to the switch signal to generate a corresponding phase shift amount. The full differential passive digital controlled phase shifter and the communication device provided by the application can configure the phase shift amount, thereby realizing the required phase shift precision; and by optimizing and combining different phase shift units, a better parasitic amplitude modulation can be obtained, which is also helpful to reduce the insertion loss, thereby meeting the design and use requirements of the phase shifter.

The application discloses a high-performance millimeter wave active vector synthesis phase shifter, which sequentially comprises an input matching amplification circuit, a quadrature coupler, two inter-stage processing circuits, a vector synthesizer and an output matching circuit; the input matching amplification circuit is used for realizing impedance matching, DC isolation and power amplification of an input signal; the quadrature coupler is used for converting the input signal into an output signal with a phase difference of 90 degrees; the inter-stage processing circuit is used for amplifying, noise-reducing and phase adjusting two signals with a phase difference of 90 degrees; the vector synthesizer is used for vector synthesizing the two signals processed by the inter-stage processing circuit; and the output matching circuit is used for realizing impedance matching of the output signal. The application not only realizes optimization of loss, phase error and gain error, but also has the characteristics of large bandwidth, high precision and high integration.

The application relates to a W-band high-precision digital control phase shifter adopting a gain compensation technology, which comprises a 90-degree polarity switching logic circuit, a radio frequency amplifier, an input balun, a quadrature signal generator, an analog adder, a double-path radio frequency amplifier and a 180-degree polarity switching logic circuit, wherein the 90-degree polarity switching logic circuit is used for generating a 90-degree state voltage; the radio frequency amplifier is connected with the 90-degree polarity switching logic circuit and the input balun respectively, and is used for phase-shifting a received radio frequency signal according to the 90-degree state voltage; the input balun, the quadrature signal generator and the analog adder are sequentially connected, and the radio frequency signal is twice phase-shifted through a received off-chip control signal; the double-path radio frequency amplifier is connected with the 180-degree polarity switching logic circuit, and the radio frequency signal is thrice phase-shifted through a received off-chip control signal to complete the phase-shifting of the radio frequency signal; the digital control phase shifter reduces the insertion loss and the gain error, and improves the phase precision of a synthesized signal of the digital control phase shifter.

To provide a superconducting quantum circuit device with high scalability in terms of scale, etc., and capable of adjusting coupling strength.SOLUTION: A superconducting quantum circuit device comprises: a SQUID (superconducting quantum interference device) in which a first superconducting line, a first Josephson junction, a second superconducting line, and a second Josephson junction are connected in a loop; two or four Josephson parametric oscillators, each of which includes a line supplying magnetic flux interlinking with the loop of the SQUID, and parametrically oscillating according to a pump signal supplied to the line; and a combiner combining the two or four Josephson parametric oscillators, the superconducting quantum circuit device further comprises means for varying the strength of the two-body or four-body interaction by varying the relative phase between the pump signals respectively supplied to the lines of the two or four Josephson parametric oscillators for parametric oscillation.SELECTED DRAWING: Figure 2A

The present disclosure discloses a phase shift attenuation circuit, a phase shift attenuation network, and a radio frequency (RF) microwave system. The phase shift attenuation circuit comprises a plurality of first differential circuits electrically connected in sequence; an electrical connection between two adjacent first differential circuits of the plurality of first differential circuits including at least one of a straight-through connection or a connection through an attenuator unit; wherein the phase shift attenuation circuit realizes 8-bit step attenuation through the attenuator unit; 7-bit step attenuation among the 8-bit step attenuation is configured to realize a phase shift function, and the 8-bit step attenuation is configured to realize phase shift and attenuation functions. The phase shift attenuation circuit is constructed based on a differential circuit architecture, and is capable of simultaneously realizing the phase shift and attenuation functions by the same circuit.

Wireless communication circuitry (24) may include active phase shifter circuitry. The active phase shifter circuitry (54) may include a quadrature hybrid coupler (56) and amplifiers (52-1, 52-2) coupled to the outputs of the quadrature hybrid coupler (56). An additional quadrature hybrid (64) coupler may be coupled to the amplifiers (52-1, 52-2).