Patent ID: 7395033

Claim:
A radio communication apparatus in which a plurality of carriers are divided into two systems, one on a low-frequency side and the other on a high-frequency side, and which has a transmitting unit in each system that executes processing for transmitting a signal wirelessly, and a distortion compensating unit in each system that compensates for distortion produced in the transmit signal, said apparatus comprising: a coupler for directly coupling, and inputting to a single antenna, final stages of respective ones of the transmitting units; and feedback units for feeding a transmit signal, which is input to the antenna, back to respective ones of the compensating units of the two systems; wherein said feedback unit on the low-frequency side feeds a carrier signal portion on the low-frequency side contained in the transmit signal back to said distortion compensating unit on the low-frequency side, and said feedback unit on the high-frequency side feeds a carrier signal portion on the high-frequency side contained in the transmit signal back to said distortion compensating unit on the high-frequency side.