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

Claim 0:
1. A radio frequency (RF) unit comprising:
a first RF coupler configured to receive an input signal;
an RF filter configured to receive a first portion of the input signal from the first RF coupler and attenuate frequencies outside of a passband of the RF filter from the first portion of the input signal;
an RF canceler connected in parallel with the RF filter, the RF canceler configured to:
receive a second portion of the input signal from the first RF coupler; and
generate 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

a second RF coupler configured to combine the cancellation signal with an output of the RF filter to generate an output signal.