| In recent years,with the gradual maturity of the integrated circuit industry,the advantages of miniaturization and modularization have been highlighted.Traditional high-voltage pulse generation technology is no longer applicable in many fields.Researchers have favored high-repetition-rate ultrafast high-voltage pulse generation technology based on all-solid-state implementation.This technology is not only one of the core keys to ultrafast diagnostic technology but also plays a very important role in military information confrontation,thus attracting widespread attention from various countries.The purpose of this study is to generate electrical pulses with repetition frequencies reaching several kilohertz,amplitudes reaching several kilovolts,and leading edges ranging from nanoseconds to picoseconds based on ultrafast switching devices combined with ultrafast circuits.The theoretical problems that need to be solved include high-repetition-rate ultrafast high-voltage pulse generation problem,ultrawideband ultrashort pulse transmission problem and circuit stability applicability problem which includes research on circuit conduction mechanism as well as improving pulse generation time and reducing recovery time.Based on the research objectives and significance mentioned above,the main work of this paper includes: firstly,reviewing relevant technical documents to understand the current state of technology development and propose preliminary solutions;secondly,conducting theoretical derivation to study the high-voltage transient conduction characteristics of avalanche diodes and reduce losses in carrier transport processes.This helps determine key factors for improving circuit performance and provides a theoretical basis and experimental evidence for optimization.Furthermore,this paper designs a new type of high-frequency ultra-fast high-voltage pulse generation circuit using pure electronic components.The circuit is composed of avalanche transistors with a hybrid MARX structure.Matching techniques such as filtering modules,fast recovery diodes,and pulse cutoff modules are added to make its output more stable.It can achieve higher frequency and narrower pulse width at the output end.Finally,the circuit is welded together and an experimental platform is built.Feasibility verification experiments are conducted first followed by control group experiments.Finally,electrical tests are performed on the optimized pulse source after debugging.Output results are recorded,analyzed,discussed along with future application directions and optimization work prospects.Through electrical testing,this design of pulse source can generate ultra-fast highvoltage pulse signals with a pulse front of 1 ns,a pulse amplitude of 6.5 k V,and a halfheight pulse width of 3.2 ns on the load under the condition that the output terminal load is 50 Ω.It can also produce high-repetition-rate ultra-fast high-voltage pulse signals with an amplitude of 1.2 k V,a front edge time of 800 ps,a repetition frequency of 200 k Hz,and a half-height pulse width of 5 ns.These results meet international advanced standards and enable continuous stable operation while achieving breakthroughs in related technologies.From waveform analysis,repetition rate and pulse amplitude perspectives on the output results from this pulsed power source;several improvement directions have been discussed including optimizing theoretical models in electrical direction;improving circuit matching in process direction;enhancing device performance as well as stability direction for further attempts.In practical applications,the signal output by this pulse source can be applied to stripe cameras,enabling them to effectively capture target information with weak light intensity and low quantum yield.It can also be used as an interference source for electromagnetic interference technology in electronic devices,providing antiinterference pressure testing for various electronic products,as well as basic research in fields such as nuclear electromagnetic radiation research. |
