A Dual IoT/ISM Smart Glasses Antenna with Human Health Concern

The present manuscript proposes a design for a low-profile linear-polarization wearable antenna embedded on glasses with IoT/ISM applications. To study body proximity antennas in terms of their effects and apt performance, this work uses a homogenous phantom. To meet the design objective, a meander structure with linear polarization is provided. The miniature antenna also provides a gain ranging between 0.8 to 2.9 dBi. The antenna is equipped with specific dimensions and geometry that allow its placement on the temple arms of a set of glasses. The used dipole antenna, with a compact design (11 mm × 44 mm × 0.8 mm) and a microstrip FR4 as the antenna substrate, is located on the frame to the right of the temple. After matching and optimization, the antenna’s reflection coefficient measured less than − 6 dB. At an operating frequency of 2.45 GHz, the antenna demonstrated a gain of 0.8 dBi and an 85% efficiency rate. The antenna's gain increased to 2.9 dBi and maintained a high 67% efficiency rate when tested at 5.8 GHz. Additionally, simulation results showed that the specific absorption rate values ranged between 0.171 and 1.18 W/kg.