Radio communication apparatus and antenna calibration method

An antenna calibration method performed by a radio communication apparatus configured to perform frequency conversion of a first transmission signal that has been modulated at a frequency in a specific frequency band to convert the first transmission signal into a second transmission signal having a frequency in a transmission frequency band and transmit the second transmission signal, the antenna calibration method comprising:

• by a calibration signal generation circuit, generating a first calibration signal outside the specific frequency band, the first calibration signal having a frequency higher than a highest frequency in the specific frequency band, and a second calibration signal outside the specific frequency band, the second calibration signal having a frequency lower than a lowest frequency of the specific frequency band;
• by an adding circuit, adding the first and second calibration signals to the first transmission signal;
• by a phase correction coefficient generation circuit, estimating a phase at a center frequency in the specific frequency band of the first transmission signal, based on the first and second calibration signals and the second transmission signal, and outputting a phase correction coefficient corresponding to the estimated phase;
• and
• by a phase correction circuit, correcting the phase of the first transmission signal, based on the phase correction coefficient.