【作者】 杨耿；

【导师】 谭吉春；

【作者基本信息】 国防科学技术大学 ， 光学， 2007， 硕士

【摘要】 为保护电子设备不受高功率微波破坏,本文研究等离子体技术在高功率微波武器防护方面的应用,主要包括以下内容:基于等离子体在高功率微波武器防护方面的特点:触发时间短、功率容限高等,提出“等离子体防护”概念,其中包括“波导等离子体限幅器”和“双层等离子体防护窗”两种防护手段。为完善防护效果,提出“级联防护”措施。1.提出“波导等离子体限幅器”防护措施。以典型尺寸波导为例,定量计算限幅器气体击穿场强和击穿时间,讨论限幅器气体参数选取原则及限幅器防护高功率微波武器的可行性。结果表明:对频率较低(小于十几GHz)的高功率微波,填充Xe(压强1 torr)的限幅器,能在大约14 ns内被高功率微波击穿形成等离子体,反射微波能量,保护敏感电子设备。2.依据等离子体衰减微波实验结果,提出“双层等离子体防护窗”。定量研究高功率微波经过防护装置后剩余功率与初始入射功率的关系,分析双层等离子体防护窗防护高功率微波武器的可行性。结果表明:不同频率的高功率微波透射过防护模型后其能量均被有效衰减,剩余功率与初始入射功率的比值在0.3%～2.7%之间。3.针对“波导等离子体限幅器”和“双层等离子体防护窗”在防护高功率微波武器中可能存在能量泄漏的问题,提出“级联防护”的改进措施,定量分析级联防护装置的防护效果。结果表明:对泄漏相对严重(由限幅器响应时间引起)的波导等离子体限幅器,经过级联防护后,高功率微波的最后透射功率可以被抑制在0.4 W以下。本文提出的“等离子体防护”概念,对高功率微波武器防护技术具有参考价值。更多还原

【Abstract】 To protect military electronic systems against High Power Microwave Weapons (HPMW), plasma protective technology is researched. This paper is organized as follows:A new method of Plasma protection, including waveguide Plasma limiter and sandwich Plasma protective window, is presented based on potential advantages of Plasma to protecting military electronic systems against HPMW. Cascade protective device is also proposed to improve the protective performance.1. Waveguide Plasma limiter is presented to protecting against HPMW with lower frequency. Gas breakdown electric field intensity and breakdown time of the limiter are numerical analyzed based on typical parameters of waveguide. Option of gas parameters and feasibility of the limiter to protecting military electronic systems against HPMW are discussed in detail. The results show: limiter filled with Xe of 1 torr can be charged by HPM in approximately 14 ns, and protects electronic systems.2. According to the experiment results, sandwich Plasma protective window is presented. Ratio between transmitted power propagating through the window and original power of the HPMW is numerical analyzed, and feasibility of the window to protecting military electronic systems against HPMW is discussed in detail. The results show: incident HPM could be attenuated by the plasma window, and the ratio is 0.3%～2.7%.3. Cascade protective device is presented to solving the problem, that Plasma limiter and sandwich Plasma protective window would induce leakage while hardening against HPMW, and Protective performance is numerical analyzed. The results show: leakage power induced by Waveguide Plasma limiter could be suppressed below 0.4 W by cascade protective measurement.更多还原