Amplifier with inter-modulation compensation - has two directional couplers with second amplifier and phase and amplitude matching elements to compensate inter-modulation

摘要

A directional coupler (2) is provided before or after the amplifier (1). The directional coupler (2) first output, or the amplifier (1) output is connected to a first input of a further directional coupler (2'). The directional coupler (2) second output is connected through a series circuit consisting of a second amplifier (1') a phase matching element (3) and an amplitude matching element (4). This is then connected to the second input of the further directional coupler (2') so that amplifier (1) is intermodulated is compensated at the further directional coupler (2') output.