The Preliminary Microwave Metamaterial Absorber Based on Ring-Shaped for Stealth Technology

Abstract

Abstract Controlling electromagnetic waves on the material is needed by several applications such as sensors, stealth technology, and energy harvesting. An artificial material that could control electromagnetic waves is called metamaterial. Meanwhile, a metamaterial absorber can absorb the electromagnetic wave. Two concepts can be used to explain the absorbing phenomena on metamaterial absorber: the matching impedance of the air and the part of the imaginary that is high of the index of refractive collectively or the theory of interference that is destructive. The correlation of matching air impedance with destructive interference theory has been found by Yudistira in his previous works. In this study, the preliminary research of metamaterial absorbers based on ring shape is presented. The 40 mm, 35 mm, 30 mm, and 25 mm ring-shaped widths are applied to this work. We used numerical simulation work to understand the performance of metamaterial absorbers based on ring-shaped. CST microwave studio was used for numerical simulation work. The absorbance peak results for w=20, w=17.5, w=15, and w=12.5 mm are 0.92 at 3.43 GHz, 0.95 at 3.7 GHz, 0.95 at 4.04 GHz and 0.99 at 4.47 GHz, severally. The maximum absorbance is yielded to 0.99 absorbances for 25 mm of the width of the ring-shaped.