摘要
开关激励的同轴λ/4谐振器是产生宽谱高功率电磁脉冲的主要方式之一,采用冲击脉冲方法分析了带耦合器输出的宽带脉冲谐振器频域响应特性。首先推导了频域响应特性与耦合器耦合系数之间的关系,并得到了产生脉冲的带宽表达式,利用Taguchi算法优化设计了宽带耦合器,使其在200～500 MHz的耦合系数S21接近0.6,之后利用轴对称的柱坐标2D-FDTD对带耦合器的宽带脉冲谐振器工作过程进行了模拟,对于不同的谐振长度,可产生200～500MHz中心频率的宽带脉冲,其频谱和带宽与理论结果吻合较好。
The switched λ/4 coaxial oscillator is used to generate high power mesoband electromagnetic pulse,the frequency response character of a coupled-output mesoband oscillator was analyzed using impulse response method.Firstly we derived the response function of the oscillator analytically,the percent bandwidth of the output pulse against the couple coefficient of the coupler was obtained as well.A coupler with nearly constant couple coefficient of 0.6 at 200-500 MHz was optimized by Taguchi method,then simulation of the oscillator working processing was performed using axial symmetric 2-D FDTD method,and the simulated frequency spectrum and bandwidth matched well with the theoretical results.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2013年第9期2363-2367,共5页
High Power Laser and Particle Beams
基金
国家高技术发展计划项目
中国工程物理研究院科学技术发展基金项目(2012B0402067)
