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Published:
Dec 12, 2019DOI:
10.4314/njt.v38i4.13Keywords:
Article Details
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Main Article Content
Design and simulation of cross-block structured radar absorbing metamaterial based on carbonyl iron powder composite
Abstract
This paper reports the design and simulation of a three layered cross-block structured radar absorbing metamaterial (RAMM). The effective electromagnetic parameters of the designed structure are highly dependent on its geometric dimensions, subsequently behaving as a metamaterial. COMSOL Multiphysics simulation software was used to analyze the frequency dependent absorption response of the designed RAMM. The input impedance of multilayered absorber and strong fluctuation theory equations are used to theoretically verify the absorption response of the RAMM. The simulated result showed that the reflectivity of the RAMM is below -10dB from 4.2 – 18.0 GHz frequency band with absorber thickness of 4.2mm. The calculated reflectivity result is in close agreement with the simulated result, thus confirming the validity of the design. The operational bandwidth to thickness ratio of this RAMM was found to be 13.029 making it better than the recently reported one with a value of 9.745 and thus contributing significantly in overcoming the contradicting demand of broadband and thin thickness.
Keywords: Bandwidth, COMSOL Multiphysics, Metamaterial, Radar Absorbing Metamaterial, Reflectivity
