A radio frequency (RF) switch apparatus includes a first series switch circuit including a first series switch disposed between a first terminal and a second terminal and operating in response to a first gate signal, and a first capacitor circuit and a second capacitor circuit connected across the first series switch; a first shunt-bias circuit disposed between a first connection node between the first terminal and the first series switch, and a ground, and providing a power voltage or a ground potential to the first connection node in response to a second gate signal; and a first shunt-impedance circuit connected between the first connection node and the first shunt-bias circuit and adjusting path impedance in response to a third gate signal. Each of the first capacitor circuit and the second capacitor circuit passes an alternating current (AC) signal or blocks a direct current (DC) voltage.