强激光与粒子束2012，Vol.24Issue(2)：428-430,3.DOI:10.3788/HPLPB20122402.0428
折射率渐变透镜的数值设计
Numerical method for designing gradient refractive index lens
摘要
Abstract
The orthodox method for designing gradient refractive index lens requires that the feeding antenna possesses a steady phase center, which restricts the application of this lens. To break through the restriction, the paper presents a numerical method. By sampling the polarized electric field of the feeding antenna, phases of the electric field are got. Then they are used to design the gradient refractive index lens, which is fabricated from metamaterials with cut-wires structure. The design method is straightforward and flexible, with no restriction on the feeding antenna. Taking patch antenna as demonstration, the return losses and radiation patterns of the patch antenna and the lens antenna are compared. The data show that the lens obviously improves the gain and efficiency of the patch antenna. The gain is improved by 2 dB and the efficiency is increased from 62% to 99%.关键词
折射率渐变/微波透镜/人工电磁材料/天线增益Key words
gradient refractive index/microwave lens/ metamaterials/ antenna gain分类
数理科学引用本文复制引用
何晓阳,王军,李彪,陈琦,周邦华,唐传祥..折射率渐变透镜的数值设计[J].强激光与粒子束,2012,24(2):428-430,3.基金项目
中国工程物理研究院科学与技术发展基金项目(2010B0403054) （2010B0403054）
