Bipolar transmission line type nanosecond pulse generator

Abstract

The invention discloses a bipolar transmission line type nanosecond pulse generator, comprising an AC power supply module and a pulse module. The output end of a power frequency AC source is connectedwith the input end of a diode rectifier bridge through an input current limiting resistor. The output end of the diode rectifier bridge is connected with the input end of an H bridge circuit througha voltage stabilization capacitor. The output end of the H bridge circuit is connected with the input end of a boost transformer. The output end of the boost transformer is grounded through an input resistor, the central copper wire of a first coaxial cable, a load output impedor and the central copper wire of a second coaxial cable. The two ends of the first coaxial cable and the two ends of thesecond coaxial cable are jointly grounded. One end of a control switch is connected to a node between the input resistor and the first coaxial cable, and the other end of the control switch is grounded. Pulses are output from both ends of the load output impedor. The beneficial effects are as follows: the AC source is used as an excitation source of a Blumlein pulse forming line, and a bipolar steep-fronted narrow width nanosecond pulse can be produced; and the bipolar transmission line type nanosecond pulse generator has the advantages of simple structure, low circuit complexity, and easy miniaturization.

Description

technical field [0001] The invention relates to the technical field of pulse generators, in particular to a bipolar transmission line nanosecond pulse generator. Background technique [0002] Because of the fast rising edge of the output voltage of the nanosecond pulse generator, the gas can be quickly ionized, and the nanosecond pulse width can effectively prevent the discharge from developing into a spark or arc discharge mode. This is beneficial to the generation of plasma, which is of great significance for the study of atmospheric pressure non-equilibrium plasma. [0003] The traditional nanosecond pulse generator is a power supply structure based on solid-state switches, and the performance of the switches in this structure determines the parameters of the overall power supply. The turn-on and turn-off speed of the switch determines the rising edge and falling edge of the pulse, and the limit response frequency limits the maximum value of the pulse repetition frequenc...

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Problems solved by technology

[0004] The invention patent with the application number 201510582258.1 discloses a high-voltage nanosecond pulse generator based on stacked Blumlein stripline, but the device uses a multi-level solid-state series switch group as the system switch, which requires more trigger coordination for multi-level solid-state switches. High, not conducive to the stability of the overall system

The invention patent with application number 201710260488.5 discloses a high frequency nanosecond pulse generator structure based on Blumlein pulse forming line and transmission line transformer. However, when the number of modules increases, the interference will be amplified and the reliability will be reduced.

The invention patent with the application number 201710260549.8 discloses a DBD high-frequency bipolar nanosecond pulse generator based on magnetic pulse compression, but the magnetic compression switch is bulky, and a full-bridge inverter circuit is used to save the magnetic core reset circuit complicate the overall structure

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