425results about "Phase shifting networks" patented technology

The utility model relates to the technical field of radio frequency integrated circuits, in particular to a phase shifter circuit and a multi-phase shifter circuit, which comprise an input node, an output node, a first signal path and a second signal path, the first signal path comprises a first switch, a second switch and a decoupling structure, the decoupling structure comprises a first inductor, a second inductor and a third inductor, the first inductor and the second inductor are connected in series, one end of the third inductor is connected to a connecting line node of the first inductor and the second inductor, and the other end of the third inductor is grounded; the second end of the second inductor is connected to the second switch; the second signal path includes a third switch, a fourth switch, and an anti-coupling transformer. The phase shifter circuit provided by the utility model solves the technical problem of poor phase flatness of a phase shift unit in a traditional phase shifter, improves the phase flatness, has broadband operating characteristics and low insertion loss, and reduces the chip area of the phase shifter circuit.

A phase adjustment circuit includes a clock generation unit (1) which generates a sinusoidal differential clock signal; a variable amplifier (2) which receives a differential clock signal output from the clock generation unit (1) as an input, outputs an amplitude-adjusted differential clock signal, and simultaneously outputs an amplitude-adjusted in-phase signal; an adding unit (3) which adds an 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 (2); a differential transmission line (4) which transmits the differential signal output from the adding unit (3); and a terminal circuit (5) which terminates the differential transmission line (4).

An I / Q signal generating apparatus and phase shift apparatus using the same are provided, the I / Q signal generating apparatus including: a first resonance circuit whose one end is connected to a first input terminal and whose other end is connected to a first output terminal; and a second resonance circuit whose one end is connected to the other end of the first resonance circuit or a second input terminal, and whose other end is connected to a second output terminal, wherein the first resonance circuit and the second resonance circuit each include a resistor, a capacitor connected in parallel with the resistor, and an inductor connected in a form of a cross between the resistor and the capacitor.

A digital phase shift circuit includes: a basic phase shift circuit including a signal line, a pair of inner lines provided on both sides of the signal line, a pair of outer lines provided outside of the inner lines, a first grounding conductor connected to one ends of the pair of inner lines and the pair of outer lines, a second grounding conductor connected to the other ends of the pair of outer lines, and a pair of electronic switches provided between the other ends of the pair of inner lines and the second grounding conductor; and an output circuit configured to decrease an output load of the basic phase shift circuit in comparison with an input load thereof.

The present disclosure provides a coupler device for use in a phased array system. The coupler device includes a weighting network and a phase matrix network. The weighting network is configured to convert and amplify an input signal to obtain eight intermediate amplified signals. The phase matrix network is coupled to the weighting network, and is configured to generate eight output signals based on the eight intermediate amplified signals. An output array of the eight output signals are obtained by performing a matrix multiplication of an array of the eight intermediate amplified signals with a phase matrix of the phase matrix network.

A phase shifter cell and multiple coupled phase shifter cells that mitigate signal glitches arising from phase state changes by a combination of design architecture and control signal timing. Specifically, one or more of the following three concepts are employed to mitigate insertion loss glitches and control phase behavior during phase state transitions: the timing of switching for each switched half-cell (e.g., including series and / or shunt reactance elements, such as inductors and / or capacitors) within a phase shifter cell is controlled in such a way that the reactance elements do not all switch at the same time; use of a “make before break” timing scheme for combination or “multi-state” phase shifter cells; and / or arranging the timing of each phase shifter cell in a set of multiple coupled phase shifter cells such that the individual cells do not all switch at the same time.

Provided is a phase shifter comprising: a switching unit which switches a transmission path of a signal (hereinafter, referred to as an "input signal") input through an input terminal so that the input signal is selectively transmitted to an output terminal through different paths; and a transformer which outputs the signal switched through the switching unit through the output terminal by coupling the switching unit and the output terminal.

The invention provides a novel broadband simulation multiple correlation type microwave radiometer, and relates to the technical field of passive remote sensing detection. The system comprises a double-path correlation radio frequency front-end unit, an intermediate-frequency filtering and amplifying unit and an analog multiple correlation unit, wherein the analog multiple correlation unit comprises two analog multiple correlation channels, each analog multiple correlation channel comprises a broadband multiplication unit and an active differential filtering unit, and the broadband multiplication units are used for carrying out differential conversion on input same signals and orthogonal signals and carrying out correlation operation; and performing active differential filtering processing on the signal after the correlation operation through an active differential filtering unit, and outputting two paths of orthogonal differential parameters. The analog multiple correlation unit designed by the invention adopts a full-link differential design, including differential passive / active filtering, amplification and transmission, the design can provide amplitude twice as large as that of a single-ended signal and better linearity under the same power supply voltage, and meanwhile, the problems of direct-current drift and common-mode interference suppression are solved.

The invention provides an ultra-wideband bidirectional active phase shifter based on reconfigurable PPFs, and belongs to the technical field of microwave radio frequency, the bidirectional active phase shifter adopts a symmetrical structure, and comprises two groups of single-ended to differential ultra-wideband Marchand baluns, two two-order reconfigurable PPFs, four bidirectional variable gain amplifiers and a digital control module; wherein the PPF adopts a two-order adjustable resistor and adjustable capacitor structure, the bandwidth can be expanded to realize the ultra wide band, and when the phase shifter carries out steering operation, the impedance is changed due to switching of a switch, so that an error is introduced, and the impedance is adjusted and the error is reduced by adjusting the resistor and the capacitor. According to the phase shifter, the advantages of an active phase shifter and a passive phase shifter are combined, the area can be further reduced while bidirectional phase shifting operation is achieved and the phase shifting precision is guaranteed, and the problems that a traditional active vector synthesis phase shifter can only conduct unidirectional phase shifting operation, and the area of a passive phase shifter is large are solved.

The invention discloses a terahertz phase shifter chip based on a magnetic coupling line fine adjustment technology, the magnetic coupling line fine adjustment technology is applied to a magnetic coupling line distributed attenuator, and a magnetic coupling line is added below a transmission line of the magnetic coupling line distributed attenuator. And a switching transistor array and a capacitive compensation transistor are respectively added at two ends of the magnetic coupling line. A vector synthesis type structure is adopted, the magnetic coupling line fine adjustment technology is innovatively provided and applied to the magnetic coupling line distributed attenuator, compared with a traditional distributed attenuator, the magnetic coupling line distributed attenuator has the advantages of being higher in precision and smaller in attenuation stepping, the occupied area is the same, the phase shifting control function of the phase shifter is achieved based on the attenuator, and the application range is wide. Finally, the phase of an output signal is controlled to realize a phase control function of 5.625-degree phase shift stepping in a full 360-degree range, and an amplitude control function in a 3dB range can be realized.

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%.

Various embodiments of the present disclosure provide a phase shifter including a plurality of digital phase shifters, each digital phase shifter of the plurality of the digital phase shifters configured to vary a phase of a phase shifter input signal by a corresponding phase shift value, and a continuous phase shifter configured to vary the phase of the phase shifter input signal with a variable phase shift value. In various embodiments, the continuous phase shifter comprises a continuous phase shifter load configured to receive a control voltage and vary the variable phase shift value using the control voltage.

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.

A phase shifter that relies on a reflected wave from a load such as a varactor with a capacitance varied by an external bias voltage is provided. The phase shift does not depend on the wave propagation through an active medium. The input RF signal is sent to the variable loading and the reflected wave from the load is channeled to the output port via a network that takes the input signal without much reflection to the input terminal but passes most of the power from the variable load to the output terminal with a phase change depending on the variable bias input of the loading. Such network to steer the input to the variable loading and send the signal reflected from the loading to the output port without much reflection includes a quadrature hybrid or a circulator.

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 discloses an ultra-wideband small-phase-shift digital phase shift circuit and a simulation method thereof, the ultra-wideband small-phase-shift digital phase shift circuit comprises an ultra-wideband phase shift network, the ultra-wideband phase shift network adopts a bridge T-shaped network embedded with an all-pass network structure, and the all-pass network structure is a dual-port transformer network formed by winding two mutual coupling inductors. The bridge T network structure can realize miniaturization design, the all-pass network structure can realize ultra-wideband design, the bridge T network structure has better performance than a common switch, the phase shifter has wider bandwidth, higher phase shifting precision and better return loss than the common switch, and the all-pass network is suitable for the ultra-wideband characteristic. And the two are combined to improve the performance of the small-shift phase. The all-pass network structure is embedded between the input port and the output port of the bridge T-shaped network structure, phase delay can be increased, bandwidth expansion is guaranteed, and meanwhile it is guaranteed that phase shifting precision is not changed.

The invention provides a phase shifter circuit, an electronic chip and a phase shift regulation and control method, and the phase shifter circuit comprises a coupler unit which converts a received input differential signal into an I-path differential signal and a Q-path differential signal which are orthogonal; the I-path gain amplification unit is used for adjusting the gain of the received I-path differential signal to obtain an I-path adjusting signal; the Q-path gain amplification unit is used for adjusting the gain of the received Q-path differential signal to obtain a Q-path adjustment signal; the synthesis unit is used for synthesizing the received I-path adjusting signal and the Q-path adjusting signal to obtain an output differential signal; the I-path switched capacitor array is used for changing the phase of the I-path differential signal by controlling and adjusting the capacitance accessed to the input end of the I-path gain amplification unit through a switch; and the Q-path switched capacitor array is used for changing the phase of the Q-path differential signal by controlling and adjusting the capacitance accessed to the input end of the Q-path gain amplification unit through a switch. According to the invention, the problem that the existing phase shifter cannot realize high precision is solved.

The embodiment of the invention provides a phase shifter, an integrated transceiving channel and a phased array system. The phase shifter comprises a first phase shifting unit, a second phase shifting unit, a third phase shifting unit, a fourth phase shifting unit, a fifth phase shifting unit and a sixth phase shifting unit, wherein the first phase shifting unit, the third phase shifting unit, the fourth phase shifting unit and the sixth phase shifting unit adopt a low-pass and band-pass switching type phase shifter structure; the second phase shifting unit and the fifth phase shifting unit adopt a high-pass and low-pass switching type phase shifter structure; and the phase shifter is used for performing phase shifting on the received signal when the configured signal receiving and transmitting device is used for receiving the signal, and performing phase shifting on the transmitted signal when the signal receiving and transmitting device is used for transmitting the signal. The phase shifter can realize a relatively large phase shifting range and has a relatively wide working frequency band, so that the phase shifter can be multiplexed when phase shifting is carried out on a receiving signal and a transmitting signal, and the overall layout area of a transceiving chip can be saved.

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.

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 an active phase shifter with temperature compensation. The active phase shifter comprises an input transformer balun, a multi-phase filter, a vector modulation module based on a Gilbert unit, an output transformer balun and a positive temperature coefficient current source, the input transformer Balun is used for converting a single-ended signal of an input end into a differential signal; the multi-phase filter is used for converting the differential signal into an orthogonal signal; the vector modulation module based on the Gilbert unit is used for carrying out polarity selection on the orthogonal signals and carrying out vector synthesis; the output transformer Balun is used for converting the output end differential signal into a single-end signal; the positive temperature coefficient current source is used for controlling the gain of the Gilbert unit. By designing the positive temperature coefficient current source changing along with the temperature, the change of the gain of the vector modulation module along with the temperature is slowed down, and the stability of the key performance of the active phase shifter within the temperature range of-55 DEG C to 85 DEG C is improved.

The invention provides a circuit. The circuit generates an output signal on an output node according to an input signal received from an input node; the circuit comprises a first path, a second path, a first switch and a second switch, the first path comprises a high-pass filter, the second path comprises another filter, and the first path and the second path are both connected between an input node and an output node in parallel. The first switch and the second switch respectively control whether the first path and the second path transmit an input signal to generate an output signal; wherein, at any specific moment, only one of the first switch and the second switch is configured to allow a corresponding path to transmit an input signal; the high-pass filter comprises a first capacitor and a first inductor; the first switch is connected between the first capacitance and the first inductance in the first path. The invention also provides a phase shifter and a system. According to the invention, the influence of parasitic capacitance in a high-pass filter which is used in parallel with another filter in a switching configuration can be reduced.

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.