PHASE CONTROL DEVICE

PROBLEM TO BE SOLVED: To provide a phase control device which sets an arbitrary phase to a high frequency signal to perform a control. SOLUTION: The phase control device includes: a first coupler 13 which receives a first high frequency signal having a first phase (a phase) and branches and outputs this signal; a first phase shifter 15 which receives the first high frequency signal and shifts the phase in accordance with a first control signal; an RF processing part 5 which subjects the phase-shifted first high frequency signal to RF processing; a second coupler 14 which branches and outputs a second high frequency signal resulting from the RF processing and having a second phase (A phase); a second phase shifter 17 which receives the second high frequency signal to shift the phase in accordance with a second control signal and outputs a third high frequency signal having a third phase (x phase); a synthesizer 18 which outputs a difference signal between the first high frequency signal and the third high frequency signal; and a control part 10 which determines the first and second control signals on the basis of the difference signal so that a phase difference between the first phase (a phase) and the third phase (x phase) becomes the second phase (A phase) of the second high frequency signal. COPYRIGHT: (C)2011,JPO&INPIT