Patent ID: 11962339
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A method for radio frequency (RF) isolation comprising:
receiving, at a first RF coupler, an input signal;
receiving, at an RF filter, a first portion of the input signal from the first RF coupler;
attenuating, by the RF filter, frequencies outside of a passband of the RF filter from the first portion of the input signal;
receiving, at an RF canceler connected in parallel with the RF filter, a second portion of the input signal from the first RF coupler;
generating, by the RF canceler, a cancellation signal from the second portion of the input signal based on a target frequency band of the RF canceler such that:
the cancellation signal has an amplitude within the target frequency band that corresponds to an amplitude of an output of the RF filter within the target frequency band, and
the cancellation signal has a phase that is inverted from a phase of the output of the RF filter; and

combining, by a second RF coupler, the cancellation signal with an output of the RF filter to generate an output signal.