High power variable nanosecond differential pulses generator design for GPR system

High power variable nanosecond differential pulses generators based on avalanche transistor and Marx Bank are investigated theoretically and experimentally. The circuit employs six avalanche transistors with charging and discharging circuitry for differential pulses generation and step recovery diode, Schottky diode for pulse shaping. The pulse width can be varied from 1ns to 4ns. The pulses amplitude varies from ±30V@1ns pulse width to ±58V@2ns pulse width. The repetition frequency can reach as high as 500kHz. This variable nanosecond differential pulses generator can be used in pulsed GPR system as transmitter and strobe generator in sequential sampling receiver circuit.