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微波孔缝线性耦合函数研究
引用本文:王建国,刘国治,周金山.微波孔缝线性耦合函数研究[J].强激光与粒子束,2003,15(11):1093-1099.
作者姓名:王建国  刘国治  周金山
作者单位:1.西北核技术研究所,陕西 西安 710024;2.西安电子科技大学 物理系,陕西 西安 710071
基金项目:国家863计划项目资助课题
摘    要: 讨论了微波脉冲通过孔缝线性耦合进入腔体内的研究方法。给出了线性耦合的物理基础,定义了耦合函数,并导出了耦合函数随入射电场极化方向变化的公式。简要描述了数值求解孔缝线性耦合的时域有限差分方法以及修正算法。给出了以矢量网络分析仪HP8510C为主要设备测量耦合函数的实验方法。通过耦合函数的研究,观察到了共振效应和增强效应等现象,给出了微波孔缝耦合发生共振的普适公式。分析了测量探头对耦合函数测量的影响,验证了耦合函数随入射电场方向变化的公式。理论、数值和实验结果符合得较好。

关 键 词:波脉冲  线性耦合  耦合函数  时域有限差分  孔缝  共振效应  增强效应
文章编号:1001-4322(2003)11-1093-07
收稿时间:2003/5/9
修稿时间:2003年5月9日

Investigations on function for linear coupling of microwaves into slots
wang jian guo,liu guo zhi,zhou jin shan.Investigations on function for linear coupling of microwaves into slots[J].High Power Laser and Particle Beams,2003,15(11):1093-1099.
Authors:wang jian guo  liu guo zhi  zhou jin shan
Institution:1. Northwest Institute of Nuclear Technology, P.O.Box 69 15, Xi''an 710024, China;2. Department of Physics, Xidian University, Xi''an 710071, China
Abstract:In this paper,the research methods for linear coupling of microwave pulses into a cavity through slots are discussed. The physical basis for the linear coupling is provided. The coupling function is defined, and the formulation of coupling function for the different polarization directions of the incident electric field is derived. To numerically solve the linear coupling problems, the finite difference time domain method and its modified algorithm are simply described. To measure the coupling function, this paper suggests the experimental setup which mainly consists of the vector network analyzer HP8510C. By investigating the coupling function, the phenomena of resonant and enhancement effects are observed, and the universal equation for microwave coupling into different shaped slots is provided. This paper analyses the effect of the probe on the measurements of coupling function, and verifies the formulation of coupling function for different incident electric field directions.The theoretical,numerical and experimental results sgree fairly well.
Keywords:Microwave pulse  Linear coupling  Coupling function  Finite-difference time-domain  Slot  Resonant effect  Enhancement effect
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