基于光子晶体PBG结构的微带天线优化研究  

Optimizating microstrip antenna based on photonic crystal PBG structure

作　　者：林若波[1] 廖兴展[1] 陈旭文[1] 

机构地区：[1]揭阳职业技术学院机电工程系,广东揭阳522051

出　　处：《重庆邮电大学学报（自然科学版）》2012年第4期431-436,共6页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：揭阳市产业技术研究与开发资金计划项目(201124)~~

摘　　要：为保证天线工作频率落在光子晶体禁带范围,对一款矩形微带天线模型进行分析与计算。采用光子晶体作介质,通过改变空气孔的孔径和孔距,优化馈电点位置,应用HFSS12电磁仿真软件进行建模、扫描、优化与分析,获得最佳传输性能。优化后,天线回波损耗比原来降低31.24 dB,相对带宽达5.3%(驻波比VSWR≤2时),天线最大辐射方向增益达25.3 dB。结果表明,光子晶体PBG结构极大地提高了微带天线的传输性能。To ensure the operating frequency of antenna locating on photonic crystal band gap range, a rectangular micros- trip antenna model is analyzed and calculated. Photonic crystal as substrate is used, the diameter and the distance of air gaps are changed between the two gaps, the feed position is optimized, and HFSS12 electromagnetic simulation software is used to build model, scan, optimize and analyze. The best transmission performance would be realized. The return loss of optimization antenna reduced -31.24 dB than the original, the relative bandwidth （ FSWR ≤ 2） reaches 5.3% , the maxi- mum gain of antenna radiation direction reaches 25.3 dB. The simulation results show that the photonic crystal PBG struc- turo could greatly improve the transmission performance of microstrip antenna.

关 键 词：光子晶体禁带 微带天线 回波损耗 带宽 增益 

分 类 号：TN82[电子电信—信息与通信工程]