Design, Implementation and Analysis of Solid-state Megahertz Continuous High-repetition-frequency High-voltage Pulse Source

Abstract

Pulsed power technology has traditionally served in the field of defense technology and is generally operated in a single operation. With the increasing demand in the military and high-energy physics fields, especially in the fields of medicine [1], industry, environmental protection and electromagnetic interference, the demand for high average power is becoming more and more urgent, requiring the pulse source to be in a high repetition frequency operating state. The high-repetition-frequency high-voltage pulse source is a pulse power system that can operate at high repetition frequencies and generate high voltage pulses. Ultra-wideband electrical pulse sources with small size and all solid-state structures are easier to integrate into the system and compatible with other devices. This paper introduces the design and implementation of a high-repetition-frequency high-voltage pulse generating device. The device is mainly composed of a pulse signal source module, a power amplification module and a pulse compression module. The article describes in detail about the pulse signal generation module based on MCU (microcontroller unit) and FPGA (field programmable gatearray) with adjustable frequency adjustable pulse width at the source level, the pulse signal power amplification module based on DSRD (drift step recovery diode) [2] switch, the pulse compression module based on the principle of diode reverse recovery. The final test results show that the device can work at 1 MHz repeat frequency, the output pulse peak voltage can be up to 1700 V on 50Ω load, the output pulse rising edge is less than 1 ns, and the half pulse width is up to 1.9 ns. If the pulse compression module is connected, the half pulse width can reach 1.56 ns and the compression ratio can reach 87%.