25results about "Phase shifting networks" patented technology

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 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.

For example, a phase shifter may include an input to receive an input clock signal having an input frequency and an input phase. For example, the phase shifter may include a quadrature phase-shift generator configured to generate a first signal and a second signal based on the input clock signal, the first and second signals having the input frequency, wherein a phase of the first signal is based on the input phase, wherein a phase of the second signal is shifted by a quadrature phase-shift relative to the phase of the first signal. For example, the phase shifter may include an output to provide an output based on the first signal and the second signal.

A phase shifter for a millimeter wave (mmW) communication system including an in phase variable gain amplifier (I VGA) and a quadrature VGA (Q VGA) configured to receive radio frequency (RF) signals, the I VGA and the Q VGA configured to provide a selectable output to primary sides of first and second electromagnetic (EM) elements, respectively, the first EM element configured to provide a single-ended I output and the second EM element configured to provide a single-ended Q output, and a hybrid quadrature generator (HQG) configured to receive the single-ended I output of the first EM element and the single-ended Q output of the second EM element, the HQG configured to provide a combined signal at a desired phase.

According to a band-pass filter, n represents a natural number equal to or more than one, and the band-pass filter includes: an input terminal (1) to receive an input of an RF signal; a multi-phase splitter (3) to split the RF signal input to the input terminal into n RF signals whose phases each differ by 360 degrees / n; n signal paths (17 to 20) to receive from the multi-phase splitter, sample, and hold one of the n RF signals whose phases each differ by the 360 degrees / n, and output the held signal, the n signal paths being connected to the multi-phase splitter, and each signal path including a sample hold element including two switches; a multi-phase synthesizer (4) to synthesize n signals output from the n signal paths, the multi-phase synthesizer (4) being connected to the n signal paths; an output terminal (2) to output the signals to be synthesized by the multi-phase synthesizer; and a clock signal source (21) to output a clock signal (S1) for driving all of switches.

A reflection-type phase shifter device (RTPS) includes at least two reflective loads having values (for example, capacitance values) that can be set independently of one another.

A bidirectional active-type phase shifter capable of reducing the overall chip size by supporting bidirectional operation is disclosed. The phase shifter includes a first circuit, a second circuit, and a control circuit. The first circuit includes two differential signal terminals and four quadrature signal terminals, and operates as an I / Q generator during a forward operation and as a vector combiner during a reverse operation. The second circuit includes four quadrature signal terminals respectively connected to the quadrature signal terminals of the first circuit and two differential signal terminals, and operates as a vector combiner during the forward operation and as a variable gain differential amplifier during the reverse operation. The control circuit controls the second circuit through four bias current sources, wherein, during the forward operation, currents between the two differential terminals remain identical, and during the reverse operation, currents among the four quadrature terminals remain identical.

According to a band-pass filter, n represents a natural number equal to or more than one, and the band-pass filter includes: an input terminal to receive an input of an RF signal; a multi-phase splitter to split the RF signal into n RF signals whose phases each differ by 360 degrees / n; n signal paths to receive from the multi-phase splitter, sample, and hold one of the n RF signals, and output the held signal, the n signal paths being connected to the multi-phase splitter, and each signal path including a sample hold element including two switches; a multi-phase synthesizer to synthesize n signals output from the n signal paths, the multi-phase synthesizer being connected to the n signal paths; an output terminal to output the signals to be synthesized by the multi-phase synthesizer; and a clock signal source to output a clock signal for driving all of switches.

This invention discloses a path selection switch, a 90-degree terahertz phase shifter, and a phased array radar, belonging to the fields of communication and radar technology. The path selection switch includes multiple transmission lines, the input ends of which are connected to form a common node, and the output ends of each transmission line are sequentially connected to a transistor and an impedance converter. The substrate of the transistor is grounded through a first resistor, and the control terminal of the transistor is connected to a second resistor. Based on this path selection switch, the 90-degree terahertz phase shifter reduces the variation of parasitic parameters under different phase shift states, reduces the deteriorating effect of parasitic parameter variations on phase shift accuracy, and improves the phase shift accuracy of the terahertz phase shifter. This overcomes the technical bottleneck of high-precision terahertz phase shifters being sensitive to parasitic parameters. At the same time, the 90-degree terahertz phase shifter has the advantages of low insertion loss and wide flatness, and both insertion loss and phase shift accuracy performance are improved.

The application discloses a kind of based on band-pass filter network's ultra-wideband phase shifter, including first-second single-pole double-throw switch, reference state network module and phase-shifting state network module;Reference state network is cascaded by multiple T type band-pass filter network unit, and phase-shifting state network is cascaded by multiple improved magnetic coupling all-pass network unit;First single-pole double-throw switch input end connects phase shifter input port, first output end connects reference state network module input end, and second output end connects phase-shifting state network module input end;Second single-pole double-throw switch input end connects phase shifter output port, first output end connects reference state network module output end, and second output end connects phase-shifting state network module output end;Signal path switching is carried out between reference state and phase-shifting state by first-second single-pole double-throw switch, and phase-shifting function is realized.The phase shifter of the application can cover the bandwidth of more than 9 times frequency range, with the advantages of small loss, small occupied area, large phase-shifting angle.

The application discloses a kind of based on the ultra-wideband 180° phase shifter of balun structure, including input matching network, balun structure, switch network and output matching network four parts;Wherein input matching network receives input end signal, and connects balun front stage input end, signal is converted into double-end signal after passing through balun, two output ends are connected to switch network, and output signal is switched by switch network, 180° phase shift is realized, and then is connected with output matching network, again access signal output end.The application is constructed by input matching network and output matching network, and the problem that traditional balun phase shift structure bandwidth is narrow, difficult to be applied to ultra-wideband phase shift is well solved, and more than 3 times frequency band of ultra-wideband phase shift can be realized;Compared with the 180° phase shifter of traditional high-low network or all-pass network, the application has the advantages of ultra-wideband, high phase shift precision, design flexible and convenient.

Provided in the present application are a phase shift circuit, an antenna feeder system and a communication device. A radio-frequency switch unit in the phase shift circuit is connected in series and / or in parallel to a filter unit, such that the filter unit can filter out an interference signal generated when a radio frequency signal passes through the radio-frequency switch unit, thereby reducing nonlinear products generated in the phase shift circuit; and moreover, the design can increase the effective layout area of the phase shift circuit.

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.

The application provides an on-chip radio frequency acoustic wave amplitude modulator and a communication device, and belongs to the field of signal processing.The on-chip radio frequency acoustic wave amplitude modulator comprises a signal input end, a first phase shifter, a second phase shifter and a phased transducer array.The first phase shifter and the second phase shifter are connected with the signal output end.The phased transducer array comprises a first phased array and a second phased array.The first phased array is connected with the first phase shifter, and the first phased array comprises a plurality of first array elements.The second phased array is connected with the second phase shifter, and the second phased array comprises a plurality of second array elements.The first array elements and the second array elements are arranged alternately, and the shortest distance between adjacent first array elements and second array elements is (N+1 / 4)λ.The modulator device can keep the miniaturization of the device and significantly improve the modulation efficiency of the wide-band radio frequency signal.

A phase shifter including a quadrature generator configured to generate an in phase (I) signal and a quadrature (Q) signal from an input signal; an in phase vector modulator (VM_I) configured to receive the I signal and a quadrature vector modulator (VM_Q) configured to receive the Q signal; and an auxiliary VM_I connected to the VM_I and an auxiliary VM_Q connected to the VM_Q, the auxiliary VM_I configured to receive the I signal, the auxiliary VM_Q configured to receive the Q signal, the auxiliary VM_I and the auxiliary VM_Q configured to receive a bias signal and configured to adjust an in phase amplitude output of the VM_I and a quadrature amplitude output of the VM_Q responsive to the bias signal.

The application belongs to the field of microwave technology, and particularly relates to a double-passband filter phase shifter with independent continuous tuning center frequency and insertion phase capacity. The center frequency and insertion phase of the two filter passbands in the phase shifter can be independently adjusted. By adjusting the bias state of each variable capacitance diode, various working modes can be realized, including: low-frequency passband insertion phase is unchanged, and high-frequency passband phase is continuously adjustable; high-frequency passband insertion phase is unchanged, and low-frequency passband phase is continuously adjustable; high-frequency passband remains unchanged, and low-frequency passband can still realize continuous phase adjustment after frequency shift; low-frequency passband remains unchanged, and high-frequency passband can still realize continuous phase adjustment after frequency shift. Thus, multi-band independent controllable application can be realized.

Embodiments of the present disclosure provide a calibration circuit for a phase shifter, a calibration method, a phase shifting circuit, a radio frequency transmitting circuit, a radio frequency receiving circuit, a radar sensor and an electronic device. The calibration circuit for the phase shifter comprises a phase acquisition circuit and a phase calibration circuit, wherein the phase acquisition circuit is coupled to the phase shifter, configured to modulate a radio frequency signal output by the phase shifter by using a first baseband signal, down-convert the modulated radio frequency signal to a baseband to obtain a second baseband signal containing an actual phase; the phase calibration circuit is coupled to the phase acquisition circuit, configured to obtain the actual phase in the second baseband signal, determine a calibration phase of the phase shifter according to a phase deviation between the actual phase and a preset phase shift phase, and generate a phase shift control signal to be sent to the phase shifter according to the calibration phase. The calibration circuit of the embodiments of the present disclosure has small calibration error and high precision.

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.

This application provides a broadband filtering 180° phase shifter, chip, and device based on magnetically coupled path switching, including an RF input terminal, a magnetically coupled path switchable network, a matching network, and an RF output terminal. The magnetically coupled path switchable network includes a first inductor, second and third inductors forming positive and negative magnetic couplings with it respectively, and first and second transistors connected to the second and third inductors respectively. The matching network includes first and second series matching units and a parallel matching unit. By alternately controlling the transistors to be on and off, the phase shifter exhibits a consistent third-order bandpass response in both the reference state and the phase-shifted state: the first capacitor and the first inductor at the input terminal are connected in parallel to form a first resonator; the off transistor and the connected inductor form a second resonator; the on transistor grounds the corresponding series matching unit, forming a third resonator with the parallel matching unit, and another series matching unit provides inter-stage coupling. This application achieves broadband high-amplitude phase consistency, significantly improving phase-shifting accuracy.

The present disclosure provides a liquid crystal phase shifter and a phased array antenna. The liquid crystal phase shifter includes: a liquid crystal phase shift unit and a switch phase shift unit, where a second end of the liquid crystal phase shift unit is electrically connected to a first end of the switch phase shift unit; a target phase difference between a signal transmitted from a second end of the switch phase shift unit and a signal transmitted from a first end of the liquid crystal phase shift unit is within [0, 360°]; and the switch phase shift unit is configured to determine a phase change range of a signal transmitted from the liquid crystal phase shifter; the liquid crystal phase shift unit is configured to continuously adjust, within the phase change range, a phase of the signal transmitted from the liquid crystal phase shifter to the target phase difference.