Patent ID: 11888504
Assignee: APPLE INC.
Field: Telecommunications (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 8:
9. A method of operating an electronic device, the method comprising:
transmitting, using a power amplifier, a radio-frequency signal to an output node over a transmission line, the output node being coupled to an antenna;
coupling, using a signal coupler disposed on the transmission line, at least some of the radio-frequency signal onto a coupled node of the signal coupler while an isolated node of the signal coupler is coupled to a termination, the signal coupler being characterized by scattering parameters S21, S32, S22, and S31, and the termination having circuit components that configure the termination to exhibit a reflection coefficient that is directly proportional to S21*S32−S22*S31; and
detecting, using a power detector, a voltage of the radio-frequency signal coupled onto the coupled node.