Multiband subwavelength magnetic reflectors based on fractals

Lei Zhou; Weijia Wen; Chan, C. T.; Ping Sheng
October 2003
Applied Physics Letters;10/20/2003, Vol. 83 Issue 16, p3257
Academic Journal
We use theory and experiment to demonstrate that a composite material, consisting of a metallic planar fractal and a metal sheet separated by a thin dielectric layer, can reflect electromagnetic wave in-phase at a series of frequencies, with some of the corresponding wavelengths much longer than the reflector’s own size. We show that the physics is governed by a series of intrinsic magnetic resonances and can be well described by an effective-media of frequency-dependent permeability. © 2003 American Institute of Physics.


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