Patent ID: 8068791

Claim:
A Time Division Duplex (TDD) switch in a wireless communication system, comprising: an isolator connected to an output port of a transmitter; a first transmission line stub, connected between the isolator and a circulator, for transmitting a transmission signal received from the isolator when in a transmission mode and for isolating a transmission path when in a reception mode; a first transmission line, connected to the circulator, for isolating a reception path when in the transmission mode, and for supplying to a receiver a reception signal provided from an antenna connected to the circulator when in the reception mode; a second transmission line stub, connected between the first transmission line and an input port of the receiver, for isolating the reception path when in the transmission mode, and for supplying the reception signal to the receiver when in the reception mode; a first pin diode directly connected between the first transmission line stub and ground for switching in response to a TDD control signal; and a second pin diode directly connected between the second transmission line stub and ground for switching in response to the TDD control signal.