强激光与粒子束, 2011, 23 (3): 707, 网络出版: 2011-04-01  

非匹配负载对宽带脉冲产生器谐振特性的影响

Influence of unmatched load on resonant characters of mesoband pulse oscillator
作者单位
1 清华大学 工程物理系, 北京 100084
2 中国工程物理研究院 应用电子学研究所, 四川 绵阳 621900
摘要
宽带脉冲产生器的谐振特性决定了产生电磁脉冲的频谱,分析了带耦合器的同轴1/4波长谐振器在负载为非完全匹配天线时,天线反射对谐振特性的影响。通过建立级联二端口微波网络分析模型,将非匹配负载的反射系数计入等效耦合器反射系数中,得到了输出脉冲及辐射场频谱与负载反射系数的关系式。数值模拟了包括谐振器、耦合器和天线在内的整个宽带脉冲辐射系统,得到的辐射场频谱与理论预期相符。由于负载反射的影响,在中心频率两侧产生了两个副峰,在高功率实验中也观察到了该现象。
Abstract
The influence of unmatched antenna load on resonance characters of quarter wavelength coaxial oscillator, which determines the output pulse spectrum, was analyzed. Based on cascading dual-port microwave network model, the relationship between load reflectance and the spectrum of output pulse was derived by involving the reflectance of unmatched load into thequivalence coupler reflectance. Numerical simulation of the generator, which contains oscillator, coupler and antenna, was performed, showing consistent results with theoretical predictions. As predicted by theory, the spectrum of the radiation pulse creates two secondary peaks around the major peak, which was also observed in the high power experiment performed.

徐刚, 孟凡宝, 廖勇, 谢平, 唐传祥. 非匹配负载对宽带脉冲产生器谐振特性的影响[J]. 强激光与粒子束, 2011, 23(3): 707. Xu Gang, Meng Fanbao, Liao Yong, Xie Ping, Tang Chuanxiang. Influence of unmatched load on resonant characters of mesoband pulse oscillator[J]. High Power Laser and Particle Beams, 2011, 23(3): 707.

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