Patent ID: 8170500

Claim:
A radio-frequency switch circuit comprising: an antenna terminal; two or more radio-frequency terminals; n-stage through FETs (field effect transistors) connected in series between the antenna terminal and each of the radio-frequency terminals, where n is a natural number; a radio-frequency leakage prevention resistor, one end of the radio-frequency leakage prevention resistor being connected to a gate of the through FETs; a control signal line commonly connected to another ends of the radio-frequency leakage prevention resistors; and a resistor inserted in each of at least two of the control signal lines between the another end of the radio-frequency leakage prevention resistor and a control circuit supplying a control signal to the n-stage through FETs, each portion of the two control signal lines being capacitively coupled between the resistor and the another end of the radio-frequency leakage prevention resistor.