A COMPLEMENTARY LENS BASED ON BROADBAND METAMATERIALS

被引：12
作者：
Cheng, Q. [1 ]
Ma, H. F. [1 ]
Cui, T. J. [1 ]
机构：
[1] Southeast Univ, Dept Radio Engn, State Key Lab Millimeter Waves, Ctr Computat Electromagnet, Nanjing 210096, Peoples R China
来源：
JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS | 2010年 / 24卷 / 01期
基金：
美国国家科学基金会;
关键词：
CLOAK;
D O I：
10.1163/156939310790322172
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We have designed a two-dimensional planar lens based on the complementary I-shape units. The resonant frequencies for these units are extremely high so that at low frequencies the effective permittivity and permeability change slowly, which is especially useful for constructing broadband and low-loss electromagnetic devices. The distributions of refraction index for the planar lens have been evaluated, and numerical simulations have been made to determine the geometry dimensions of the corresponding units. The fabricated sample has been tested in a two dimensional near-field microwave scanning apparatus. Distributions of the measured electric fields show that the lens has good focusing ability at the working frequencies and also exhibits broadband and low-loss properties under the excitation of plane waves.
引用
收藏
页码：93 / 101
页数：9
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