AMPLIFIER CIRCUIT, ANTENNA MODULE AND RADIO COMMUNICATION EQUIPMENT

摘要

PROBLEM TO BE SOLVED: To downsize an antenna while maintaining communication performance.SOLUTION: A amplifier circuit amplifies a carrier wave received by transmitting/receiving means. The amplifier circuit includes: a superposed wave generation part that generates a superposed wave which is superposed to the carrier wave; an amplification part that outputs an amplification carrier wave obtained by adding the superposed wave to the carrier wave; and an amplitude detection part that detects the carrier wave to be a predetermined carrier wave on which a predetermined communication signal is carried, according to variation of an amplitude value of the carrier wave. The amplification carrier wave is output when the predetermined carrier wave is detected.