SELF-INTERFERENCE CANCELLATION ANTENNA SYSTEMS AND METHODS

摘要

The present application describes systems and methods of performing self-interference cancellation. Such systems may include generating a transmit signal along a transmit path of a transceiver, where the transmit signal can be sent through a circulator to isolate the transmit signal from a receiver. The transmit signal may be transmitted from an antenna, and a signal may be reflected from the antenna, where the reflected signal may be at less power than an incident power to the antenna, and where the reflected signal may include a transmitter carrier signal and a transmitter noise. A received signal may be routed from the antenna to the receiver, the reflected signal may be routed through a filter and a phase shifter, and the signal may be combined with the received signal in the receive path to cancel the portion of the transmit signal that entered the receive path towards the receiver from the circulator.

主权项

1. A self-interference cancellation system, comprising:
a transmitter power amplifier configured to amplify a transmit signal; a first circulator coupled to the transmitter power amplifier, the first circulator being coupled to a transmission-reception path of the self-interference cancellation system; a second circulator coupled to the first circulator; an antenna at an end of the transmission-reception path, the antenna being configured to transmit the transmit signal and receive a receive signal; a receiver amplifier coupled to a reception path of the self-interference cancellation system; a phase shifter coupled to the reception path and the second circulator; and a filter coupled to the phase shifter, the filter being located between the phase shifter and an electrical load.