High-Efficiency Dual Band Metamaterial Absorber For ISM Band Biosensor Applications

Metamaterials are not found directly in nature and exhibit extraordinary electromagnetic properties such as focusing. Thanks to this excellent focusing ability, they can increase the absorption rate and are therefore very good candidates for electromagnetic biosensor applications. For this purpose, in this study, a metamaterial absorber was developed in four stages. Different geometric structures were examined step by step and the effect of the capacity of the structure on the absorption rate for each step was investigated for two frequency values of the ISM band. According to the simulation results, the proposed metamaterial can absorb 99% and 90% of incoming signals at 2.38 GHz and 5.81 GHz, respectively.