Journal
JOURNAL OF OPTICS
Volume 17, Issue 5, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2040-8978/17/5/055101
Keywords
ultra-broadband; metamaterial absorber; interference theory
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Funding
- National Natural Science Foundation of China [41474117]
- special funds for development scientific research unit projects of Wuhan, China [2013BJ004]
- Central China Normal University [2013YBYB48]
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The simplified multireflection interference theory is proposed to analyze the physical insight quantitatively of the ultra-broadband metamaterial absorber (MMA) loading lumped resisters in which the resonant layer, including lumped resisters and the substrate, are equivalent to a homogeneous and isotropic effective medium. The simulated full width at half maximum (FWHM) absorption bandwidths is approximately 11.2 GHz with relative FWHM absorption bandwidths of 116.7% for a normal incidence electromagnetic wave. Microwave experiments are performed and measured results are in good agreement with the numerical results. The absorbance of the proposed MMA calculated by the simplified multi-reflection interference theory coincides well with simulated and measured results.
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