物理学报2012，Vol.61Issue(24)：206-213,8.
基于场匹配法的双排矩形栅慢波结构高频特性研究
Analysis of high frequency characteristics of the double-grating rectangular waveguide slow-wave-structure based on the field match method
摘要
Abstract
A mode analysis is presented for the double-grating rectangular waveguide slow-wave structure (SWS) with arbitrary longitu- dinal displacements between the two gratings. By matching boundary conditions along the sides of the gratings, the distribution of electromagnetic field and high frequency characteristics of the SWS are studied. The simulation results show that the dispersion curve deduced from field equations is in good agreement with that simulated by software while the interaction impedance is higher than that calculated by HFSS, but lower than by CST. It also demonstrates that the longitudinal displacement between two gratings has a great effect on the first stop-band. The upper cutoff frequency of the first mode almost overlaps the lower cutoff frequency of the second mode when the displacement is set to be strictly half period, that is to say, the first stop-band disappears. To avoid the mode degeneracy and competition, the displacement is reduced to be about 0.45 times of period, so that with the interaction impedance kept unchanged, the stop-band increases about 7.9GHz, while the pass-band declines about 2.8 GHz.关键词
场匹配法/双排矩形栅慢波结构/色散特性/耦合阻抗Key words
field match method/double-grating rectangular waveguide SWS/dispersion relation/interactionimpedance.分类
信息技术与安全科学引用本文复制引用
刘青伦,王自成,刘濮鲲,董芳..基于场匹配法的双排矩形栅慢波结构高频特性研究[J].物理学报,2012,61(24):206-213,8.基金项目
国家自然科学基金重点项目（批准号：60931001）和国家自然科学基金（批准号：61172016）资助的课题. （）
