摘要
将一种新型加坡度方式同轴布喇格反射器的多模耦合理论与电磁仿真软件(CST)进行了数值模拟比较研究。结果表明:两者吻合较好,但多模耦合理论方法计算编程容易,运算速度快,参数调整非常方便;具有正圆锥形坡度的同轴布喇格反射器的带宽随着所加坡度角的增大而变窄,具有倒圆锥形坡度的同轴布喇格反射器的带宽随着所加坡度角的增大而变宽;采用窗函数技术,可以有效地抑制新型坡度的同轴布喇格反射器频率响应曲线的残余旁瓣。这些特性有利于改善同轴布喇格结构作为反射器或者滤波器的性能。
Comparative study of the multi-mode theory with the Computer Simula- tion Technolgy（CST） software is carried out for the numerical simulations of a new coaxial Bragg reflector corrugated with sinusoidal ripples. Results show good agreement between the multi-mode theory and the CST software. However, compared with the CST software, the multi-mode theory has the peculiarities of easy programming, fast calculation speed,and convenient adjusting,and the bandwidth of the coaxial Bragg reflector with positive taper can be narrowed by increasing the tapering angle,whereas the bandwidth of the coaxial Bragg reflector with negative taper can be expanded by increasing the tapering angle. The residual side-lobes of the frequen- cy response can be effectively suppressed by employing the windowing-function technique. These characteristics of a tapered coaxial Bragg structure are favorable to improvement of the performance as a reflector or a filter in its applications.
出处
《电波科学学报》
EI
CSCD
北大核心
2011年第1期55-61,共7页
Chinese Journal of Radio Science
基金
海南省教育厅科学基金资助课题(Hjsk2010-60)
关键词
同轴布喇格反射器
坡度正弦波纹壁
多模耦合
残余旁瓣
窗函数
coaxial Bragg reflector
tapered sinusoidal ripples
multi-mode theory
residual side-lobes
windowing function
