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Modelling and Simulation in Engineering
Volume 2017 (2017), Article ID 3658247, 8 pages
https://doi.org/10.1155/2017/3658247
Research Article

Enhancing the Performance of the Microwave Absorbing Materials by Using Dielectric Resonator Arrays

1Department of Renewable Energy Engineering, AL-Albayt University, Mafraq, Jordan
2University of Arkansas, Fayetteville, AR 72701, USA

Correspondence should be addressed to Omar H. Al-Zoubi; ude.krau@ibuozlao

Received 4 November 2016; Revised 3 January 2017; Accepted 9 January 2017; Published 5 April 2017

Academic Editor: Ricardo Perera

Copyright © 2017 Omar H. Al-Zoubi and Hameed Naseem. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We present a technique for enhancing the performance of microwave absorbing materials in terms of weight, thickness, and bandwidth. The introduced technique is based on fabricating the microwave absorbing (MA) material in a structure comprised of an array of circular cylinder dielectric resonators (CDR) backed by a perfect electric conductor (PEC) ground plane. Numerical electromagnetic methods are employed to study the properties of the proposed MA array structures, where 3D full wave simulation using finite-element method is implemented. The obtained results show that the performance of the MA-CDR arrays significantly outperforms that of a flat layer composed of the same material and having equivalent thickness. A flat layer of MA material with thickness of 5 mm backed by perfect electric conductor (PEC) shows as low as  dB reflection loss (RL) peak and ~3 GHz 10-dB bandwidth, whereas an MA-CDR array, composed of the same MA material, of height of 4 mm can achieve as low as ~−50 dB RL peak and ~12 GHz 10-dB RL bandwidth.