Patent ID: 9571153
Date: 2017-02-14
CPC Classifications: H04B,H04L

Claim:
1. A user equipment (UE) for cancelling a self-interference (SI) signal, the UE comprising: a rat-race coupler; a plurality of transceiving antennas capable of transmitting and receiving signals; a receive antenna; a transmission (Tx) chain connected to an input port when the rat-race coupler uses one port as the input port; and a reception (Rx) chain connected to the receive antenna and an isolated port when the rat-race coupler uses the one port as the input port, wherein a first transceiving antenna of the plurality of transceiving antennas is connected to a first output port of two output ports when the rat-race coupler uses the one port as the input port, and a second transceiving antenna of the plurality of transceiving antennas is connected to a second output port of the two output ports.