期刊
APPLIED PHYSICS LETTERS
卷 94, 期 4, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3059568
关键词
dielectric materials; electromagnetic wave absorption; permittivity; polarisation
资金
- Engineering and Physical Sciences Research Council, U. K. (EPSRC-GB)
We present a microwave absorbing structure comprised of an array of subwavelength radius copper disks, closely spaced from a ground plane by a low loss dielectric. Experiments and accompanying modeling demonstrate that this structure supports electromagnetic standing wave resonances associated with a cylindrical cavity formed by the volume immediately beneath each metal disk. Microwave absorption on resonance of these modes, at wavelengths much greater than the thickness of the structure, is dictated almost entirely by the radius of the disk and permittivity of the dielectric, being largely independent of the incident angle and polarization.
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