High-repetition and -stability all-solid state pulsers based on avalanche transistor Marx circuit

Abstract

Ultra-wide spectrum (UWS) pulser, in which avalanche transistor is used as its switch, can generate high-repetition and -stability short-pulse, but its power is sharply lower than that of SOS and Tesla generators. Marx circuit is used to increase the power of this type of pulser. Different charged-capacitance and class of Marx circuit determines different waveform and peak-power of output pulse. 20-class and 30-class avalanche transistor Marx circuit pulsers are designed, and the charged-capacitance is 100pF and 470pF, then 4types of waveform are get. The highest output peak-voltage is 2.9kV, the highest repetition can reach 70kHz, and keep a better pulse stability, jitter is less than 40ps.

A circuit design of UWB GPR transient source based on avalanche transistor

“…In [3], the output waveform has not so good symmetry. The Marx circuit is designed in [4], which has drawbacks such as its large size, high voltage supply and difficulty to achieve. The nanosecond pulse generators are achieved by avalanche transistor circuit in [5] and [6].In order to meet the requirements of the UWB GPR source, circuit design of large amplitude waveform, narrow pulse width and low voltage supply is considered.…”