FULL-DUPLEX WIRELESS TRANSCEIVER WITH HYBRID CIRCUIT AND RECONFIGURABLE RADIATION PATTERN ANTENNA

摘要

A method and circuit are provided that solve the problem of prolonged signal fading in transceivers utilizing dual antenna match in a hybrid transmitter-receiver cancellation circuit, thereby enabling practically implementable full-duplex single channel, or duplexerless frequency division duplex (FDD), wireless communication systems. The method includes controlling dynamic change in signal's amplitude and phase at the receiver port of a hybrid Tx-Rx circuit by continuously varying radiation pattern parameters of at least one antenna, while maintaining nearly constant impedance at the hybrid's antenna interface ports and equalizing propagation delays between the hybrid circuit and both antennas, using a novel circuit design.

主权项

1. A dual-antenna hybrid transmitter-receiver cancellation circuit, comprising:
a hybrid component coupled to a first antenna port and to a second antenna port isolating transmitted signals at a transmitter port from received signals at a receiver port; a configurable radiation pattern antenna coupled to one of the first antenna port and the second antenna port; and a control circuit controlling the configurable antenna based on a received radiation pattern so as to avoid signal cancellation at the receiver port by varying at least one of amplitude and phase of signal at the one of the first antenna port and the second antenna port.