Single antenna full duplex communications using a common carrier

Recently there has been much interest in systems capable of full duplex communications operating with a common RF carrier frequency in both the transmit and receive channels. All the reported systems require transceivers with multiple transmit and receive antennas in order to achieve sufficient isolation between the transmit and receive channels. The technique detailed in this paper is the first reported system to achieve full duplex communication using a common carrier operating with a single antenna resulting in high transmit to receive isolation and low insertion loss. The technique provides over 40 dB isolation between the transmitter and receiver channels and 0.75dB insertion loss for the transmitter-to-antenna and antenna-to-receiver paths.