RADIO APPARATUS

PROBLEM TO BE SOLVED: To provide a radio apparatus for extracting a reception signal component by canceling or reducing the effect of a transmission signal, in simple configuration, even when transmission/reception is performed simultaneously. SOLUTION: A transmission signal TX1 from a transmitter 4 provided in the vicinity of a receiver 5 is mixed as noise into a reception signal extracting unit 11 of the receiver 5 together with a reception signal RX of a reception target as an input signal. A transmission signal TX2 having phase information of the transmission signal TX1 is delayed by a delay circuit 17 and applied to a sampling circuit 13 as a sampling signal. A delay amount of the delay circuit 17 is adjusted so that the input signal is sampled in synchronization with zero crossing of the transmission signal TX1. COPYRIGHT: (C)2009,JPO&INPIT