%0 Journal Article
%T Dendritic metamaterial absorber based on the impedance matching<br>基于阻抗匹配条件的树枝状超材料吸收器
%A Zhang Yan-Ping
%A Zhao Xiao-Peng
%A Bao Shi
%A Luo Chun-Rong
%A <br>张燕萍
%A 赵晓鹏
%A 保石
%A 罗春荣
%J 物理学报
%D 2010
%I 
%X Based on the electromagnetic resonant characteristic of the metallic dendritic cells, we present a metamaterial absorber (MA) composed of periodic array of double dendritic cells. The unit cell of the absorber is composed of two metallic elements on the substrate, a two-level dendritic cell and a three-level dendritic cell are located on each side separately. Designing different impedance matching conditions, the effect of impedance matching on the absorptivity is found. The experimental results show that a maximum absorptivity of 90% can only occur when the MA layer is impedance-matched to free space. At the same time, increasing the number of MA layers can effectively enhance the absorptivity. For 3 layers, the absorptivity above 99% can be obtained, that is to say, a perfect MA is realized in the engineering sense.
%K dendritic structure
%K impedance matching
%K absorption<br>树枝状结构
%K 阻抗匹配
%K 吸收
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=A267B2B20A6E8CF8B8CA0E76D3AC3403&yid=140ECF96957D60B2&vid=6AC2A205FBB0EF23&iid=9CF7A0430CBB2DFD&sid=5AA187D61260F708&eid=707D5C891A6FC242&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=18