Dual-band metamaterial-based energy harvesting application for WLAN communication frequency bands

Abstract

Abstract The increasing need for energy has made energy harvesting applications a hot topic in the last few decades. Metamaterials that give effective results in harvesting have been presented and analyzed in various designs since the day they were discovered. In this study, a dual band metamaterial-based system that can harvest energy in the WLAN communication frequency band is proposed. The metamaterial with a novel double circle rings geometry is designed and investigated for energy harvesting both numerically and experimentally. A lumped element and no lumped element resonator are studied with copper covered dielectric substrate for perfect absorbance. S parameters give two peaks at 2.48 GHz and 5.00 GHz. The absorptions of the proposed metamaterial structure are 77.84% and 84.02% at these frequencies, respectively. After the experimental fabrication of the proposed structure, absorption is measured as 92.38% and 95.90% at 2.48 and 5.00 GHz, respectively. Finally, harvesting calculations are carried out. The absorption efficiencies of the proposed structure are found as 64% at 2.44 GHz and 68% at 5.00 GHz. A total harvest percentage of 30.32% is calculated as harvesting efficiency parameter at these frequencies. This study reveals that the proposed structure can be considered as potential EM energy harvesters at 2–6 GHz frequency range.