Multi bands metamaterial absorber optimized by genetic algorithm in microwave regime
Moayed H. Hameed, Shihab A. Shawkat, Khalid Saeed Lateef Al-Badri
Abstract
This article demonstrates a metamaterial-based two square rings resonator perfect electromagnetic absorber by using genetic algorithm for multi-band microwave applications such as radar cross sections, bolometer, energy harvesting, thermal detection, and airborne applications. The unit cell incorporates two split square ring resonators. A parametric optimization has been carried out by genetic algorithm in order to obtain six absorption peaks. Therefore, the combination of two square split ring resonators presents six perfect absorption (i.e. highest absorption level) of 96.4%, 99.31%, 94.4%, 91.1%, 99.4% and 95.2% at resonance frequency 13.3 GHz, 14.6 GHz, 16.1 GHz, 17.2 GHz, 17.84 GHz and 18.33 GHz respectively. The proposed structure works due to metamaterial resonance mechanism based on SRR resonator and zero-level-reflection absorption mechanisms to provide multi absorption bandwidth. Our design is of individual benefit to improve devices which need multi-band absorption.