SHF Impulse Generator.

摘要

A super-high-frequency (SHF) impulse generator designed and built by the National Bureau of Standards,is described in detail. The generator produces three different waveforms. The first is a simple impulse of 1volt amplitude (3 V option) and 60ps duration with a useful spectrum (15dB down) extending from low frequencies out to 9GHz. The second waveform is a single cycle 5GHz sine wave (doublet) of 0.8volts peak-to-peak amplitude (1.6V option). Its useful spectrum extends from 0.5GHz to 11.7GHz. The third waveform is an exponentially damped rf pulse. It has a center frequency of 12.5GHz and a damping time constant of 1/4ns. The peak-to-peak amplitude is 0.8volts. The useful spectrum extends from 6GHz to 18GHz.