Patent ID: 8175546

Claim:
A receive antenna interface for a transceiver including a ground-on-transmit connector that provides a fixed ground connection and a switched ground connection, the receive interface comprising: a chassis; a relay having transmitting and receiving antenna terminals that are adapted to be coupled to respective transmitting and receiving antennas, said transmitting antenna terminal being selectively coupled by said relay to a transceiver interface terminal adapted to be coupled to a transceiver communication terminal in a first state, and said receiving antenna terminal being selectively coupled to said transceiver interface terminal in a second state, wherein said relay includes a control line; and a ground control circuit carried by said chassis, said ground control circuit coupled to said control line to control said states of said relay, said ground control circuit including a transmit-ground connector having a first and a second grounding terminal that are adapted to be coupled to the fixed ground connection and the switched ground connection of the ground-on-transmit connector respectively, said first and second ground terminals being electrically isolated from said chassis; wherein when the fixed ground connection of the ground-on-transmit connector is coupled to said first grounding terminal, said ground control circuit places said relay in said second state, and when the switched ground connection is switched to ground and said relay is in said second state, said ground control circuit places said relay in said first state.