Microwave response of hole and patch arrays

被引:2
作者
Taylor, Melita C. [1 ]
Edmunds, James D. [1 ]
Hendry, Euan [1 ]
Hibbins, Alastair P. [1 ]
Sambles, J. Roy [1 ]
机构
[1] Univ Exeter, Sch Phys, Electromagnet Mat Grp, Exeter EX4 4QL, Devon, England
基金
英国工程与自然科学研究理事会;
关键词
D O I
10.1103/PhysRevB.82.155105
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The electromagnetic response of two-dimensional square arrays of perfectly conducting square patches, and their complementary structures, is modeled utilizing a modal matching technique and employing Babinet's principle. This method allows for the introduction of progressively higher diffracted orders and waveguide modes to be included in the calculation, hence aiding understanding of the underlying causal mechanism for the observed response. At frequencies close to, but below, the onset of diffraction, a near-complete reflection condition is predicted, even for low filling fractions: conversely, for high filling fractions a near-complete transmission condition results. These resonance phenomena are associated with evanescent diffraction, which is sufficiently strong to reverse the step change in transmission upon establishment of electrical continuity; i.e., the connected structure demonstrates increased transmission with increasing filling fraction.
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页数:6
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