Design and Analysis of Metaresonator-Based Tri-Band Antenna for Biosensing Applications

A metamaterial resonating antenna design having a hexagonal patch is proposed for biosensing applications to work in triband resonating frequencies at 5.2GHz, 9.6GHz, and 18.5GHz. The hexagonal patch is built on a dielectric constant of 4.4 FR4 epoxy substrate with a loss tangent of 0.030. Two different antennas are designed and tested with conducting metallic patches bounded by split ring resonator (SRR) slots and closed ring resonator slots which are also hexagon-shaped. Each antenna is capable of resonating at different frequency bands with good wide band characteristics due to the presence of partial ground plane. The hex-SRR resonates at 1.9GHz and 3.1GHz and hexagonal-CRR resonates at 5.2GHz, 9.6GHz, and 18.5GHz frequency bands resulting in multiband resonance characteristics. The proposed antenna is also validated with the study of metamaterial property of hexagonal SRR at the resonant frequency of 5.2GHz hence resulting in a compact (20 x 20 x 1.6) mm(3) and more dominant design. Furthermore, the specific absorption rate (SAR) for the three-layer phantom model is confirmed, resulting in superior performance that is more appropriate for biosensing and on-body wearable devices. The testing is performed using an E5063A ENA vector network analyzer provided by Keysight Technologies. The measured and simulated results are very close, resulting in a better validation of the proposed work.