MICROWAVE AMPLIFIER DEVICE

摘要

The purpose of the invention is to reduce extreme performance deterioration caused on the basis of the frequency relationship of a specific beat signal even when a plurality of communication carriers are input in a wideband. A microwave amplifier device includes: a bias circuit formed from a line (20) having an electrical length of one quarter the wavelength at the frequency to be amplified by the microwave amplifier device and connected between the output terminal of an amplifier (11) and a bias voltage source (13), and a capacitor (14) connected between the terminal where the line (20) is connected to the bias voltage source (13) and a ground (10) that determines the reference potential of the microwave amplifier device; and a resonator circuit that includes a resistor (15) and a capacitor (16) connected in series between the ground (10) and the terminal where the line (20) is connected to the bias voltage source (13).