Patent ID: 8824975

Claim:
A radio communication apparatus that has a normal transmitting/receiving mode and a distortion correction mode, the apparatus comprising: a transmitting circuit that includes a transmitting processing circuit configured to generate a high frequency signal from a transmitting baseband signal by radio transmitting process and a power amplifier configured to amplify the high frequency signal; a transmitting antenna configured to transmit the high frequency signal amplified by the power amplifier; a receiving antenna configured to receive the high frequency signal transmitted by the transmitting antenna; a receiving circuit that includes a low noise amplifier configured to amplify the high frequency signal received by the receiving antenna and a receiving processing circuit configured to generate a receiving baseband signal by demodulating the high frequency signal amplified by the low noise amplifier; a distortion detecting section configured to detect a distortion component using the transmitting baseband signal and the receiving baseband signal; an adjustment section arranged between the transmitting antenna and the receiving antenna and configured to adjust a degree of coupling between the transmitting antenna and the receiving antenna, wherein the adjustment section includes a passive element, a ground, and a switch operable to connect the passive element to the ground; and a control section configured to close the switch to connect the passive element to the ground, in the normal transmitting/receiving mode, and to open the switch to disconnect the passive element from the ground, in the distortion correction mode.