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。
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 finitedifference timedomain 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 differentshaped 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 agree fairly well.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2003年第11期1093-1099,共7页
High Power Laser and Particle Beams
基金
国家863计划项目资助课题
关键词
微波脉冲
线性耦合
耦合函数
时域有限差分
孔缝
共振效应
增强效应
Microwave pulse
Linear coupling
Coupling function
Finite-difference time-domain
Slot
Resonant effect
Enhancement effect
