A phase shift amount adjustment device includes a memory and a processor to obtain reception power at a reception device that receives first and second signals from a transmission device that has first and second antennas to transmit the first and second signals whose phase shift amounts are adjusted by first and second phase shifters, respectively; store, in the memory, table data representing characteristics of amplitudes of the first and second signals with respect to change in the phase shift amounts of the phase shifters, respectively; calculate a squared value of a sum of first and second amplitudes of the first and second signals in first and second phase shift amounts of the phase shifters obtained from the table data; and adjust the first and second phase shift amounts so as to maximize an evaluation value obtained by dividing the reception power divided by the squared value.

A phase shift amount adjustment device includes a memory and a processor to obtain reception power at a reception device that receives first and second signals from a transmission device that has first and second antennas to transmit the first and second signals whose phase shift amounts are adjusted by first and second phase shifters, respectively; store, in the memory, table data representing characteristics of amplitudes of the first and second signals with respect to change in the phase shift amounts of the phase shifters, respectively; calculate a squared value of a sum of first and second amplitudes of the first and second signals in first and second phase shift amounts of the phase shifters obtained from the table data; and adjust the first and second phase shift amounts so as to maximize an evaluation value obtained by dividing the reception power divided by the squared value.

The present disclosure provides a phase shifter, a driving method for the phase shifter, and an antenna system, and belongs to the field of communication technologies. The present disclosure provides a phase shifter, including: a control module, a digital-to-analog conversion module and a phase shift structure; the control module is configured to generate a plurality of correction signals according to phase shift degrees of the phase shift structure; the digital-to-analog conversion module is configured to generate a driving signal according to the correction signals; and the phase shift structure is configured to shift a phase of a microwave signal passing therethrough according to the driving signal.

A propagation delay tune correction apparatus comprising a means for generating a frequency spectrum signal by performing short-term Fourier transform on an audio signal; a means for setting a propagation delay time for each of a plurality of predetermined frequency bands; a means for calculating a phase control amount for each of the plurality of predetermined frequency bands on a basis of the propagation delay time set for each of the plurality of predetermined frequency bands; a means for generating a phase control signal by smoothing the calculated phase control amount for each of the plurality of predetermined frequency bands; a means for controlling a phase of the frequency spectrum signal for each of the plurality of predetermined frequency bands on a basis of the generated phase control signal; and a means for generating an audio signal on which a propagation delay correction is performed by performing inverse short-term Fourier transform on the frequency spectrum signal of which the phase is controlled for each of the plurality of predetermined frequency bands.

A propagation delay tune correction apparatus comprising a means for generating a frequency spectrum signal by performing short-term Fourier transform on an audio signal; a means for setting a propagation delay time for each of a plurality of predetermined frequency bands; a means for calculating a phase control amount for each of the plurality of predetermined frequency bands on a basis of the propagation delay time set for each of the plurality of predetermined frequency bands; a means for generating a phase control signal by smoothing the calculated phase control amount for each of the plurality of predetermined frequency bands; a means for controlling a phase of the frequency spectrum signal for each of the plurality of predetermined frequency bands on a basis of the generated phase control signal; and a means for generating an audio signal on which a propagation delay correction is performed by performing inverse short-term Fourier transform on the frequency spectrum signal of which the phase is controlled for each of the plurality of predetermined frequency bands.

A phase control signal generation device generating a phase control signal for each of frequency bands for an audio signal converted into a frequency domain, the phase control signal generation device comprising: a setting change means that is able to change setting of a propagation delay time for each of predetermined frequency bands; a difference obtaining means that obtains a difference between propagation delay times before and after setting change; an updating means that updates a phase control amount of the frequency band for which the propagation delay time is changed, based on the obtained difference; and a phase control signal generating means that generates a phase control signal of each frequency band by performing a smoothing process for the phase control amount in a frequency domain using the updated phase control amount.

A phase control signal generation device generating a phase control signal for each of frequency bands for an audio signal converted into a frequency domain, the phase control signal generation device comprising: a setting change means that is able to change setting of a propagation delay time for each of predetermined frequency bands; a difference obtaining means that obtains a difference between propagation delay times before and after setting change; an updating means that updates a phase control amount of the frequency band for which the propagation delay time is changed, based on the obtained difference; and a phase control signal generating means that generates a phase control signal of each frequency band by performing a smoothing process for the phase control amount in a frequency domain using the updated phase control amount.

Various embodiments of the invention relate to a high accuracy phase shift apparatus. The phase shift apparatus comprises a voltage controlled analog phase shifter, a microcontroller unit (MCU) and a digital-to-analog converter (DAC). The MCU generates a digital control signal, which is converted into an analog control signal by the DAC to control the voltage controlled analog phase shifter to achieve desired phase shift angle. The phase shift apparatus may further incorporate a temperature sensor for temperature compensation. The output from the temperature sensor may be used to modify the reference voltage of the DAC, or alternatively be used to modify the digital control signal from the MCU. By incorporation digitalized control and temperature compensation to an analog phase shifter, the disclosed phase shift apparatus achieves high accuracy digitalized control, a flat phase shift over a wide bandwidth, and a stable phase shift over temperature variation.

Various embodiments of the invention relate to a high accuracy phase shift apparatus. The phase shift apparatus comprises a voltage controlled analog phase shifter, a microcontroller unit (MCU) and a digital-to-analog converter (DAC). The MCU generates a digital control signal, which is converted into an analog control signal by the DAC to control the voltage controlled analog phase shifter to achieve desired phase shift angle. The phase shift apparatus may further incorporate a temperature sensor for temperature compensation. The output from the temperature sensor may be used to modify the reference voltage of the DAC, or alternatively be used to modify the digital control signal from the MCU. By incorporation digitalized control and temperature compensation to an analog phase shifter, the disclosed phase shift apparatus achieves high accuracy digitalized control, a flat phase shift over a wide bandwidth, and a stable phase shift over temperature variation.

A digital phase shifter includes a plurality of digital phase shift circuit groups in which a plurality of digital phase shift circuits are connected in cascade and one or more bend-type connection units connected between two digital phase shift circuit groups. At least one of the digital phase shift circuits constituting at least one digital phase circuit group is a mitigation circuit that mitigates a distribution of phase shift amounts.