Asymmetrically biased high linearity balanced amplifier

摘要

A microwave amplifier and more particularly to a microwave amplifier configured as a Doherty amplifier. In particular, the amplifier includes a carrier amplifier, a peak amplifier a Lange coupler at the input of the amplifiers and quarter wave amplifier at the output of the amplifiers. In order to improve isolation between the amplifiers to minimize the dependence of each amplifier's inter-modulation (IM) performance on the others, matching networks are provided, coupled to the output of the amplifiers. In addition, the microwave power amplifier includes electronic tuning which allows for improved inter-modulation distortion over a wide input power dynamic range, which allows the IM performance of the microwave amplifier to be adjusted for the operating frequency of the amplifier.