科研之友
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摘要
Metamaterials are engineered materials that show negative values of permittivity and/or permeability over a finite frequency band. It has been a real challenge to obtain negative values of permeability since there are no free magnetic charges in nature. However, various resonator structures such as split-ring resonators, spiral resonators, and S-shaped resonators (SSRs) have been demonstrated to have negative values for the real part of effective permeability over narrow spectral bands. In this paper, an SRR-type metamaterial will be presented to enhance the radiation performance of array antenna by suppressing side-lobes with low additional loss. This kind of structure performs as spatial angular filters, whose transmission coefficient decreases as the incident angle increases.
- 出版日期2015-5
- 单位深圳光启高等理工研究院; 清华大学
