频带展宽的复合左右手传输线偶极子天线  

Bandwidth-extended dipole antenna based on composite right/left handed transmission line

作　　者：曹卫平[1,2] 张惠敏[1] 李思敏[1,2] 李贝贝[1] 

机构地区：[1]桂林电子科技大学信息与通信学院认知无线电与信息处理省部共建教育部重点实验室,桂林541004 [2]广西无线宽带通信与信号处理重点实验室,桂林541004

出　　处：《电波科学学报》2016年第5期891-895,共5页Chinese Journal of Radio Science

基　　金：国家自然科学基金(61361005;61001020;61461016);桂林电子科技大学研究生教育创新计划(YJCXS201526)

摘　　要：针对周期复合左/右手(Composite Right/Left-Handed,CRLH)传输线偶极子天线带宽窄的问题,提出一种非周期CRLH传输线的天线模型.该模型主要由N个不同尺寸的LC梯形网络单元组成,实现参差调谐,改善天线的阻抗匹配,拓展天线带宽.设计了一种四单元非周期CRLH偶极子天线,模拟和实验测试结果表明:天线的长度为0.135λ_0时,满足回波损耗|S_(11)|≤-10dB的相对阻抗带宽为8.55%,天线的匹配性能得到了改善.To solve the problem of narrow bandwidth in electrically small antenna which employs pe-riodic composite right/left-handed（CRLH）transmission line,a new type of electrically small dipole anten-na using non-periodic CRLH transmission line is proposed.The model includes N units of various size LC ladder network cells.Staggered tuning is implemented to improve the antenna impedance matching and broaden the antenna bandwidth.A four units non-periodic CRLH dipole antenna is designed.The simula-tion and experiment show that when the length of the antenna is 0.135λ0 ,8.55% impedance bandwidth with ｜S1 1｜≤-10 dB can be achieved.The matching performance of the antenna is improved to a large ex-tent.

关 键 词：非周期结构 阻抗匹配 阻抗带宽 

分 类 号：TN821.4[电子电信—信息与通信工程]