A compact multi-layer phase correcting lens to improve directive radiation of Vivaldi antenna

被引:20
作者
Li, Xiangxiang [1 ]
Liu, Gang [1 ]
Zhang, Yanmei [2 ]
Sang, Lei [1 ]
Lv, Guoqiang [1 ]
机构
[1] Hefei Univ Technol, Natl Key Lab Adv Display Technol, Natl Engn Lab Special Display Technol,Minist Educ, Acad Photoelect Technol,Key Lab Special Display T, Hefei 230009, Anhui, Peoples R China
[2] Beijing Inst Technol, Radar Res Lab, Beijing 100081, Peoples R China
基金
中国国家自然科学基金;
关键词
end-fire antenna; gain enhancement; Vivaldi antenna; layout of unit cell; phase correcting lens; TAPERED SLOT ANTENNA; GAIN ENHANCEMENT; BROAD-BAND; DESIGN;
D O I
10.1002/mmce.21109
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
Gain of the conventional Vivaldi antenna (CVA) decreases at higher frequencies. A phase correcting lens (PCL) made up of nonresonant rectangular patch unit cells (UCs) is proposed to correct this problem. The layout of the UCs is specially designed taking into account the actual phase error at antenna aperture. The detailed analysis, design and discussion for the CVA with the proposed PCL are performed. The CVA, CVA with one-layer PCL (CVA-OPCL), and three-layer PCL (CVA-TPCL) are fabricated and measured. The measured results agree well with the simulated ones. The measured results show that the proposed CVA-TPCL provides a gain variation of 5.75-14.9 dBi in the wide operating range from 3.5 to 16 GHz, which leads to 1.1-6.1 dBi gain enhancement than that of the CVA. In addition, the E-plane half power beamwidths become narrowed significantly at higher frequencies. An average improvement of 4.54 dB is achieved in terms of the front-to-back ratio. The sidelobe levels, on average, are reduced by 4.1 dB and 2.8 dB for E-plane and H-plane, respectively.
引用
收藏
页数:12
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