Patent ID: 11947032
Assignee: KABUSHIKI KAISHA TOSHIBA
Field: Measurement (Instruments)
Classification: CPC G  Y | IPC G

Claim 9:
10. The full duplex radio apparatus according to claim 9, wherein:
the self-interference cancellation circuit comprises:
a variable attenuator;
a variable phase shifter; and
a signal combiner comprising a first input, a second input, and a first output;

the seventh port of the second directional coupler is coupled to an input of the variable attenuator;
an output of the variable attenuator is coupled to an input of the variable phase shifter;
an output of the variable phase shifter is coupled to the first input of the signal combiner;
the third port of the first directional coupler is coupled to the second input of the signal combiner; and
the first output of the signal combiner is coupled to the first receive path.