研究目的
Investigating the generation of high-power microwave pulses with short duration in Ka-band and X-band, focusing on coherent summation of radiation from several generators and steering the directional pattern of summarized radiation.
研究成果
The results demonstrate high radiation power density in the interaction space of ultra-short-pulse oscillators and the capability of steering the pattern of coherently operating HPM generators. The work highlights the potential for generating extremely high-intensity microwave pulses through coherent summation of emission from relativistic Cherenkov sources.
研究不足
The study is limited by the breakdown strength of the media, which affects the maximum achievable power flux density. Additionally, the phase synchronization between several HPM generators requires identical voltage pulses, which may not always be achievable.
1：Experimental Design and Method Selection:
The study focuses on the generation of high-power microwave pulses using relativistic microwave oscillators, specifically backward-wave oscillators (BWOs), in both superradiance (SR) and quasi-stationary (QS) modes. The methodology includes the use of phased arrays for coherent summation of radiation.
2：Sample Selection and Data Sources:
The experiments utilize electron beams with power of ~ 2–3 GW to excite SR pulses in Ka-band BWOs. Data is collected from the generated microwave pulses and their interaction with the media.
3：List of Experimental Equipment and Materials:
The equipment includes relativistic BWOs, explosive electron emission (EEE) cathodes, and slow-wave structures (SWS). Materials involve the electron beams and the media for microwave breakdown studies.
4：Experimental Procedures and Operational Workflow:
The procedure involves applying voltage pulses to EEE cathodes to form electron beams, which then excite SR pulses in BWOs. The operational workflow includes the measurement of microwave pulse characteristics and the study of their interaction with the media.
5：Data Analysis Methods:
The analysis includes the measurement of power conversion factors, phase spread, and standard deviation of rf pulses, as well as the study of radiation patterns and power flux density.
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