Patent ID: 8908668

Claim:
An apparatus, comprising: first, second, and third device ports; a transmission circuit configured to generate a transmission signal to be transmitted by an antenna, wherein the transmission circuit is coupled to the first device port; a reception circuit configured to process a reception signal received from the antenna, wherein the reception circuit is coupled to the third device port; a circulator including a first circulator port, a second circulator port and a third circulator port, wherein an input to the first circulator port is output to the second circulator port and an input to the second circulator port is output to the third circulator port; a transmission filter coupled between the first circulator port and the first device port; a reception filter coupled between the third circulator port and the third device port; and a transmission termination unit coupled to the third circulator port and the reception filter, wherein the second circulator port is coupled to the second device port.