Patent ID: 7965990

Claim:
A method for amplifying signals in a communication system, the method comprising: applying a first signal to a first input of a first directional coupler; receiving, at a first output of the first directional coupler, a first version of the first signal reduced in power by approximately half; receiving, at a second output of the first directional coupler, a second version of the first signal reduced in power by approximately half and differing in phase by approximately 90 degrees; inputting the first version of the first signal to a first amplifier; inputting the second version of the first signal to a second amplifier; outputting an amplified version of the first version of the first signal to a first input of a second directional coupler having at least two outputs; outputting an amplified version of the second version of the first signal to a second input of the second directional coupler; and outputting, at only a second of the at least two outputs of the second directional coupler, a version of the first signal.