Abstract: A tuning circuit is provided for increasing the power transfer between first and second electrically coupled utilization circuits while controlling the effective source reflection coefficient thereby increasing the power available to the latter wherein the input signal provided at the output of the first utilization circuit is reflected back reducing the power available at the input of the second utilization circuit. The input signal is applied to the first input of the power combiner while a feedback signal proportional to the power loss between the first and second utilization circuits is applied to the second input of the power combiner. The output of the power combiner is increased by the feedback signal for compensating the power loss of the input signal such that the power available to the second utilization circuit is increased.

Abstract: A gallium arsenide monolithic microwave integrated circuit amplifier comprising a first stage having a common gate field effect transistor to provide matching of the input impedance, a second stage having a common source field effect transistor to provide class A gain, and a third stage having a common source open drain field effect transistor to provide class B gain for the amplifier. This monolithic integrated circuit amplifier provides a gain of greater than 25 decibels over a frequency band of 400 Hz-1.5 GHz.