Patent ID: 11916577
Assignee: SKYWORKS SOLUTIONS, INC.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. A radio frequency system comprising:
a power amplifier configured to amplify radio frequency transmit signals;
a duplexer circuit including a first transmit filter configured to receive a radio frequency transmit signal from the power amplifier, a first receive filter configured to receive, via the first transmit filter, a leakage signal caused by the radio frequency transmit signal, and a cancellation path configured to receive the radio frequency transmit signal from the power amplifier;
an antenna configured to receive the radio frequency transmit signal from the first transmit filter;
first and second low-noise amplifiers, the first low-noise amplifier configured to receive the leakage signal from the first receive filter and amplify the leakage signal, and the second low-noise amplifier configured to receive a cancellation signal caused by the radio frequency transmit signal travelling through the cancellation path; and
a phase shifter configured to apply a phase shift to one or both of the leakage signal and the cancellation signal.