The present invention is characterized in that with the purpose to reduce influences of a calibration circuit on the calibration, a first calibration weight basic amount and a second calibration weight basic amount are calculated based on each of a calibration signal transmitted from a calibration unit (50) to a base station transmit-receive unit (40) via an antenna x unit (10-x) and a calibration signal transmitted from the base station transmit-receive unit (40) to the calibration unit (50) via the antenna x unit (10-x) respectively, and a calibration weight is calculated based on the first calibration weight basic amount and the second calibration weight basic amount.