Abstract:
Based on the problems existing in microwave system of adjustable output power, a system with linear continuous adjustable output power was designed. With adjusting the voltage of magnetron cavity plate by the feedback control circuit, the microwave output power can be adjusted continuously and linearly . The system consists of three main parts: independent power supply for the magnetron filament, voltage-power nonlinear correction and feedback control of the power supply circuit of magnetron resonant cavity. Confirmed by experiment, the linearity between the power density of input required and actual output is pretty good and the determination coefficient R
2 was 0.9709.