Patent ID: 8909167

Claim:
A wireless communication device, comprising: a first antenna operable to transmit and receive first signals; a second antenna operable to transmit and receive second signals; a switch comprising a first connection terminal connected to the second antenna, a second connection terminal, and a control terminal for receiving a control signal, wherein the switch connects the first connection terminal to the second connection terminal or disconnects the first connection terminal from the second connection terminal according to the control signal; a balun comprising a first balance terminal connected to the second connection terminal of the switch, a second balance terminal connected to the first antenna, and an unbalance terminal; a transceiving module connected to the unbalance terminal of the balun; and a baseband module connected to the transceiving module and operable to transmit the control signal to the control terminal of the switch to trigger connection or disconnection of the first connection terminal and the second connection terminal through the switch in response to the control signal; wherein the switch further comprises: a first capacitor comprising a first terminal and a second terminal, wherein the first terminal of the first capacitor is connected to the second antenna and acts as the first connection terminal of the switch; a second capacitor comprising a first terminal and a second terminal, wherein the first terminal of the second capacitor is connected to the second terminal of the first capacitor, the second terminal of the second capacitor is connected to the balun and acts as the second connection terminal of the switch; a first comprising a first terminal and a second terminal, wherein the first terminal of the first inductor is connected to a common node of the first capacitor and the second capacitor, the second terminal of the first inductor is operable to receive the control signal and acts as the control terminal of the switch; and a diode comprising a cathode connected to a ground and an anode connected to a common node of the first capacitor, the second capacitor and the first inductor; wherein when the control signal is a high voltage level signal, the diode turns on and is connected to the ground, and the switch disconnects the first connection terminal from the second connection terminal; wherein when the control signal is a low voltage level signal, the diode turns off, and the switch connects the first connection terminal and the second connection terminal.