Design and implementation High-Power Solid-State Switch Bank for Modern Pulse Radar Modulators using Parallel Stacked High Power MOSFET Transistors

Abstract

High voltage power supply of microwave tubes, which called in radar systems the modulator, has the ability to produce high voltage and power pulses.

    The most important part of modern modulators is the high-power solid-state switch bank which works on the primary inductance of high-power pulse transformer as a load, and finding high voltage pulses on the output of it using the turn ratio of the pulse transformer.

     In this work, we propose a new structure of high-power solid-state switch bank for driving high power pulses applied on the magnetron tube in the radar transmitter. The proposed structure is based on snubber circuits and MOSFET leader transistor added to a Parallel Stacked High Power MOSFET Transistors. Proper performance of the proposed structure is evaluated through simulations and experiments.  It is verified that the proposed design can achieve a high voltage and short pulse-width pulses without over voltage pulses and oscillation.