The disclosure relates to a radar transceiver having a transmitter comprising a phase shifter. Example embodiments include a radar transceiver (200) having a normal mode of transmitter operation and a self-test mode of operation, the transceiver (200) comprising: a digital controller (116) configured to provide a digital control signal indicative of a phase shift; a digital to analogue converter (122) configured to receive the digital control signal and provide an analogue signal in accordance with the phase shift; a phase shifter (124) configured to receive the analogue signal and provide a phase shifted output signal for transmission; a dummy load (240) connected to receive the analogue signal from the digital to analogue converter (122) and to provide an analogue output; a resistor network (331) connected across an output of the dummy load (240); a testing module (335) configured to measure the analogue output of the dummy load (240); and a controller module (339) configured to control operation of the dummy load (240); testing module (335) and digital controller (116) during the self-test mode of operation by: enabling the dummy load (240); operating the digital controller (116) to provide a range of digital control signals to the digital to analogue converter (122); and operate the testing module (335) to measure the analogue output of the dummy load (240) to determine a measure of linearity of the digital to analogue converter (122).

The disclosure relates to a radar transceiver having a transmitter comprising a phase shifter. Example embodiments include a radar transceiver (200) having a normal mode of transmitter operation and a self-test mode of operation, the transceiver (200) comprising: a digital controller (116) configured to provide a digital control signal indicative of a phase shift; a digital to analogue converter (122) configured to receive the digital control signal and provide an analogue signal in accordance with the phase shift; a phase shifter (124) configured to receive the analogue signal and provide a phase shifted output signal for transmission; a dummy load (240) connected to receive the analogue signal from the digital to analogue converter (122) and to provide an analogue output; a resistor network (331) connected across an output of the dummy load (240); a testing module (335) configured to measure the analogue output of the dummy load (240); and a controller module (339) configured to control operation of the dummy load (240); testing module (335) and digital controller (116) during the self-test mode of operation by: enabling the dummy load (240); operating the digital controller (116) to provide a range of digital control signals to the digital to analogue converter (122); and operate the testing module (335) to measure the analogue output of the dummy load (240) to determine a measure of linearity of the digital to analogue converter (122).

The present disclosure provides a phase shifting device, a driving method thereof, and an antenna. The phase shifting device of the present disclosure includes: data lines, scan lines and phase shifting units. Each phase shifting unit includes: a switch sub-circuit and a phase shifter. Control terminals of the switch sub-circuits in a same row are coupled to a same scan line, first terminals of the switch sub-circuits in a same column are coupled to a same data line, and a second terminal of each switch sub-circuit is coupled to a phase shifter included in the phase shifting unit to which the switch sub-circuit belongs. Each switch sub-circuit is configured to transmit, in response to a switch control signal provided by the scan line, a data voltage signal provided by the data line to the phase shifter to drive the phase shifter.

The present disclosure provides a phase shifting device, a driving method thereof, and an antenna. The phase shifting device of the present disclosure includes: data lines, scan lines and phase shifting units. Each phase shifting unit includes: a switch sub-circuit and a phase shifter. Control terminals of the switch sub-circuits in a same row are coupled to a same scan line, first terminals of the switch sub-circuits in a same column are coupled to a same data line, and a second terminal of each switch sub-circuit is coupled to a phase shifter included in the phase shifting unit to which the switch sub-circuit belongs. Each switch sub-circuit is configured to transmit, in response to a switch control signal provided by the scan line, a data voltage signal provided by the data line to the phase shifter to drive the phase shifter.

The present application relates to a method and apparatus for implementing a radar array including a gate bias source for providing a first variable voltage, a back gate well control for providing a second variable voltage, and a field effect transistor having a drain, a source, a gate and a back gate well control, the field effect transistor being further configured to couple an alternating current radar signal between the drain and the source and to adjust a phase of the alternating current radar in response to first variable voltage applied to the gate and the second variable voltage applied to the back gate well control.

A phase adjustment device includes: a detection signal generator configured to generate a pair of first and second detection signals for detecting a phase difference between two signals whose phases have been adjusted by two phase adjusters, respectively, a maximum sensitivity phase difference of one of the first and second detection signals being not overlap with that of the other, and detection sensitivity of the phase difference becoming maximum at the maximum sensitivity phase difference; a detection signal selector configured to select one of the first and second detection signals whose predetermined range around the maximum sensitivity phase difference covers a preset phase difference; and a phase controller configured to control an amount of phase-adjusting by at least one of the two phase adjusters based on a difference between the phase difference detected within the predetermined range using the selected detection signal and the preset phase difference.

Apparatus and methods for phase shifting are provided herein. In certain embodiments, a phase shifter includes a first port, a first controllable reflective load, a second port, a second controllable reflective load, and a pair of coupled lines that are electromagnetically coupled to one another. The pair of coupled lines includes a first conductive line between the first port and the first controllable reflective load and a second conductive line between the second controllable reflective load and the second port. At least one of the first controllable reflective load or the second controllable reflective load includes a switched transmission line load.

Apparatus and methods for phase shifting are provided herein. In certain embodiments, a phase shifter includes a first port, a first controllable reflective load, a second port, a second controllable reflective load, and a pair of coupled lines that are electromagnetically coupled to one another. The pair of coupled lines includes a first conductive line between the first port and the first controllable reflective load and a second conductive line between the second controllable reflective load and the second port. At least one of the first controllable reflective load or the second controllable reflective load includes a switched transmission line load.

This invention discloses a power divider, a radio frequency transceiver and a multi-stage power divider, the power divider comprises a variable gain amplifier, a power dividing circuit, a power detection circuit and a comparison circuit. The variable gain amplifier comprises a first input terminal, a control terminal and a first output terminal, the first input terminal is configured to receive a first local oscillation signal, and the first output terminal outputs a variable output signal to the power dividing circuit. The power dividing circuit outputs a second local oscillation signal to a next stage power divider and outputs a third local oscillation signal to an up/down converter. The power detection circuit outputs a detection voltage. The comparison circuit receives a reference voltage and the detection voltage and compares the reference voltage with the detection voltage and outputs a bias voltage to the power terminal based on a comparison result.

This invention discloses a power divider, a radio frequency transceiver and a multi-stage power divider, the power divider comprises a variable gain amplifier, a power dividing circuit, a power detection circuit and a comparison circuit. The variable gain amplifier comprises a first input terminal, a control terminal and a first output terminal, the first input terminal is configured to receive a first local oscillation signal, and the first output terminal outputs a variable output signal to the power dividing circuit. The power dividing circuit outputs a second local oscillation signal to a next stage power divider and outputs a third local oscillation signal to an up/down converter. The power detection circuit outputs a detection voltage. The comparison circuit receives a reference voltage and the detection voltage and compares the reference voltage with the detection voltage and outputs a bias voltage to the power terminal based on a comparison result.