Patent ID: 7423499

Claim:
A high-frequency switching apparatus comprising an input/output control circuit including: a first and a second input/output terminals; a transfer circuit unit composed of a first switching circuit and connected to the first input/output terminal at its one end and to the second input/output terminal at its other end, the first switching circuit including a first field-effect transistor; a shunt circuit unit composed of a second switching circuit and connected to the second input/output terminal at its one end, the second switching circuit including a second field-effect transistor; and an electromagnetic wave absorption material element connected to an other end of the shunt circuit unit, wherein by applying one of a high level voltage and a low level voltage to a gate of the first field-effect transistor and a gate of the second field-effect transistor such that the applied voltages are in opposite phase, a path between the first input/output terminal and the second input/output terminal is switched between a conduction state and a cutoff state.