PURPOSE: To realize stable antenna diversity reception by providing a matching circuit applying impedance matching with a load when an antenna booster circuit is selected and acting like a load of the circuit when the circuit is not selected to an output terminal of the antenna booster circuit.

CONSTITUTION: One of an antenna booster circuits 2a, 2b selected by an antenna changeover switching circuit 3 sends a received radio wave of antennas 1a, 1b to reception section 5 efficiently. On the other hand, since the output terminal of the other circuit not selected in the antenna booster circuits 2a, 2b is connected to a matching circuit 8 having a prescribed impedance, the matching circuit 8 acts like a load of the antenna booster circuits 2a, 2b. Thus, even when the antennas 1a, 1b are used switchingly by the antenna changeover switching circuit 3, unstable operation or occurrence of oscillation is not caused.