加载谐振环的新型宽带准八木天线设计  

A Novel Design of Broadband Quasi-Yagi Antenna Loaded with Split-Ring Resonators

作　　者：谢鹏[1] 王光明[1] 李海鹏[1] 

机构地区：[1]空军工程大学防空反导学院,西安710051

出　　处：《微波学报》2017年第2期17-21,共5页Journal of Microwaves

基　　金：国家自然科学基金(61372034)

摘　　要：设计了一种新型宽带准八木天线,该天线采用微带线进行馈电,通过一种新型的巴伦结构实现了微带线到共面带状线的转换。天线有一个辐射振子和两个引向振子,介质板背面的金属地板作为反射器,具有较宽的带宽。为了进一步提高增益,在引向振子前端加载两组开口谐振环单元。改进后天线的-10 dB阻抗带宽为53.7%(5.9~10.2 GHz),增益达到了5.7~9.3 dB,相比改进前平均提高了2 dB。对原型天线和改进后天线分别进行了加工测量,测量结果与仿真结果基本吻合。A novel broadband Quasi-Yagi antenna is presented. The antenna is fed by a microstrip line. A new balun structure is used to realize transition from microstrip line to coplanar strip line. It has a radiator and two directors, the ground plane at substrate bottom acts as reflector. The bandwidth is relatively broad. To enhance the gain, two groups of split-ring re- sonators （SRR） are loaded on the front of the directors. The -10dB return loss bandwidth of the improved antenna reached 53.7% （5.9-10.2 GHz）, 5.7 -9.3 dB gain is attained, about 2 dB more than the original antenna. Both the original an- tenna and the improved antenna are fabricated and measured. The measured results agree with the simulated ones.

关 键 词：宽带天线 准八木天线 开口谐振环 提高增益 

分 类 号：TN823.17[电子电信—信息与通信工程]