Limitation on the bandwidth of artificial perfect magnetic conductor surfaces
Limitation on the bandwidth of artificial perfect magnetic conductor surfaces
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DOI：
10.1049/iet-map:20050309
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发表时间：
2007-02-01
影响因子：
1.7
通讯作者：
Brewitt-Taylor, C. R.
中科院分区：
文献类型：
--
作者：
Brewitt-Taylor, C. R.
完美的磁导体表面反射的电磁波没有电场的相位变化，而完美的电导体表面反射的是180度的相位变化。现有的结构只有在特定的频率下才能达到这种条件。对于较薄的结构，远离该频率的相位变化较大，从而导致在给定公差范围内实现所需条件的较小带宽。由于结构的因果性和无源性，基于频率选择曲面的结构存在基本的带宽上限。
A perfect magnetic conductor surface reflects electromagnetic waves without phase change of the electric field, in contrast to the 180 degrees phase change from a perfect electric conductor. Existing structures achieve this condition only at a particular frequency. The phase variation away from this frequency is larger for thinner structures, leading to smaller bandwidth over which the desired condition is achieved to given tolerance. There is fundamental upper limit on the bandwidth of structures based on frequency-selective surfaces arising from the causality and passivity of the structure.