Simply put, a combining system places multiple transmit (Tx) and receive (Rx) signals onto a single common port. Within a combining system, a Tx combiner gathers all transmit signals together onto a single output port whilst a Receive Multicoupler will take incoming signals and split them to feed multiple receivers. If the Tx output and Rx input are both fed into the Tx and Rx ports on a duplexer then the resulting common (Ant) port carries both signals to/from a single antenna creating a multi-channel RF combining system.