Research And Implementation Of A Nanosecond High And Heavy Frequency Low Jitter Pulse Generator

Time-domain ultra-wideband technology is a technology with great application potential emerging in the electronics field in recent decades.Its principle is to use the extremely narrow time-domain pulse generated to form ultra-wideband signals for application.UWB technology applications have important commercial and military value and have been successfully applied in systems such as radio communications,radar,imaging,and high-precision probing and positioning.A key technology in time-domain ultra-wideband technology is the generation of impulse signals.The common solid-state impulse signal source is realized by first storing energy and then discharging it quickly,releasing energy instantaneously and effectively to the load,and finally outputting a high amplitude narrow pulse.The sub-nanosecond high-frequency low-jitter pulse signal generator is taken as the research object,and the generation method of the pulse signal generator is mainly studied.The research content of the thesis mainly includes time domain and frequency domain analysis of time domain Gaussian pulse signals,comparing the differences between different circuit implementations,and finally theoretical analysis of the avalanche effect principle of Marx cascade circuits,and proposes corresponding design schemes and implementations.finally carried out a prototype test to verify the relevant indicators.The Marx cascade circuit designed in this paper uses the avalanche effect of the avalanche transistor to realize the narrow pulse high voltage signal.The core is to charge the capacitor in parallel and then discharge it in series.The voltage on the capacitor is superimposed on the final stage circuit to output a high voltage narrow pulse.First,the device parameters in the circuit are calculated theoretically,and the circuit is simulated by PSpice software to optimize various circuit parameters and verify the realization goal.According to the simulation results,select the corresponding circuit device,consider the characteristics of the signal for PCB layout,and finally realize the physical object,complete the output pulse amplitude of 382 V,the pulse half-peak width is 560 ps,and the repetition frequency is 10 kHz.Finally,the paper is written.