张岩
1，赵超超
1，贾田扬
2
（1. 北京航空航天大学，中国 北京100191；2. 中国科学院空天信息创新研究院，中国 北京100094）
摘要：提出并设计了一种基于紧耦合偶极子的宽带透射阵天线，该透射阵天线由宽带馈源天线和宽带透射型超表面两部分组成。馈源是经过改进设计的超宽带Vivaldi天线；宽带透射型超表面包括30×15个单元结构，每个单元结构由紧耦合偶极子天线和平行双导线组成。引入等效延迟距离的概念用于设计透射阵，并对其菲涅尔区电场进行研究。
关键词：电磁超表面；透射阵天线；宽带天线；菲涅尔区
Design of Broadband Transmitarray and Its Near-Field Research
ZHANG Yan1, ZHAO Chaochao1, JIA Tianyang2
(1. Beihang University, Beijing 100191, China; 2. Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China)
Abstract: A wideband transmitarray antenna based on tightly coupled dipole is proposed in this paper. The transmitarray antenna is composed of a wideband feed antenna and a wideband transmission metasurface. The feed is an improved ultrawide band Vivaldi antenna. The wideband transmission metasurface consists of 30×15 cells, each of which consists of a tightly coupled dipole antenna and parallel metal lines. The concept of equivalent delay distance is introduced to design the transmitarray and its Fresnel zone electric field is investigated.
Keywords: electromagnetic metasurface; transmitarray antenna; wide band antenna; Fresnel zone
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