双层EBG结构的优化设计  

Optimum Design of Double-layer EBG Structure

作　　者：沙莎[1] 彭涛[1] 田雨波[1] 

机构地区：[1]江苏科技大学电子信息学院,江苏镇江212003

出　　处：《压电与声光》2011年第5期846-848,共3页Piezoelectrics & Acoustooptics

基　　金：江苏省高校自然科学基金资助项目(07KJB510032);江苏省普通高校研究生科研创新计划基金资助项目(CX10S_0072)

摘　　要：研究了一种新型的双层电磁带隙(EBG)结构,该结构在金属导带上刻蚀蝶形单元,在接地板上刻蚀圆环孔,并运用粒子群优化算法(PSO)与高频电磁仿真软件(HFSS)相结合的方法对接地板刻蚀圆孔进行优化,使结构的传输特性更好。在优化过程中,首先对圆孔的外径进行优化,然后在此基础上再优化内径,通过仿真计算结果可看出,优化后-10dB的相对带宽和阻带的衰减值分别增加了22.69%和15.26%,通带波纹减小了76.76%。优化后结构的频率特性较好,优化效果理想。A new dual-plane electromagnetic band gap （EBG） structure is studied in this paper. The bow-tie holes were etched on the metal conductor line, and cirques were etched on the metal ground plate. A new method based on the particle swarm optimization algorithm and the powerful simulation of HFSS software was used to optimize the cirques to get a better transmission characteristic. During the optimization, the external diameter of cirques was optimized first, based on which the inner diameter was optimized. The simulation data showed that the relative bandwidth at -- 10 dB and the attenuation of stop band were increased by 22.69% and 15.26% respectively, and the pass-band ripple was reduced by 76.76 %. The effect of optimizing was good with very fine frequency characteristic.

关 键 词：电磁带隙 蝶形单元 传输特性 相对带宽 

分 类 号：TN820[电子电信—信息与通信工程]