摘要
提出一种数值分析周期慢波结构色散特性的模拟法：先采用时域有限差分法和离散傅里叶变换技术计算含周期慢波结构的谐振腔的谐振频率及谐振场分布，再基于周期慢波电路色散关系的周期性质，利用几个特殊色散点由数值组合技术获得周期慢波线的完整色散关系。数值计算了同轴波纹波导中ＴＭ０ｎ模式的色散关系。亦能用于分析计算任意复杂几何结构的周期慢波线的色散关系。
The FD_TD method with FFT is applied to calculate the eigenfrequencies and eigenfield distribution of a resonant cavity which is an appropriately shorted periodic slow wave circuit of N periods at both ends, the synthetic technique based on the intrinsic characteristics of spatially periodic structure is used to derive the complete dispersion relation using a few specially measured resonances. The novel method was sucessfully applied to analyze the high frequency characteristics of the coaxial relativistic backward oscillator and is applicable to slow wave structures of arbitrary geometry.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
1997年第3期347-352,共6页
High Power Laser and Particle Beams
基金
国家863激光技术领域资助
关键词
同轴返波管
同轴波纹波导
色散
微波器件
dispersion relation, coaxial corrugated wall waveguide, FD TD, FFT.
