Radio frequency switch circuit

A radio frequency switch circuit, comprising:

• a first switch circuit unit including at least one switching transistor connected between a first node connected to a first signal port and a common node connected to a common port, and operated according to the first control signal;
• a second switch circuit unit including at least one switching transistor connected between a second node connected to a second signal port and the common node, for performing a switching operation complementarily to the first switch circuit unit according to a second control signal;
• a first shunt circuit unit including at least one shunt transistor connected between the second node and a common source node and operated according to the first control signal;
• a second shunt circuit unit including at least one shunt transistor connected between the first node and the common source node, for performing a switching operation complementarily to the first shunt circuit unit according to the second control signal;
• and
• a source voltage generating unit generating a source voltage to be applied to the common source node,
• wherein the source voltage is lower than a threshold voltage of the shunt transistor and is equal to or higher than a sub-threshold voltage of the shunt transistor.