Design of Asymmetrically Loaded Dual Band Antenna for ISM Band Applications

The internet of medical things equipped with 5G technology have become part of our everyday activities, and they will soon become integrated in to our bodies. In the future, 5G is expected to significantly lower the expense of diagnosing, preventing, and saving the lives of patients through wearables and healthcare technologies. In this paper, rectangular shaped frequency reconfigurable antenna with two square ring resonators are proposed for ISM Band applications. It comprised of a radiating patch with a rectangular element and two square ring resonators that are placed1.5 mm apart from the feed line. As a band stop filter, the two square ring resonators are employed. The length of the feed lines and the excitation of the radiating element can be changed by setting up two PIN diode switches, which results in two distinct operating modes. The antenna has a volume of 50 × 50 × 1.6 mm³. The offset feed is chosen to match the antenna’s impedance to the micro strip line. When both diodes are turned OFF, the observed resonant frequencies are 3.46–3.54 GHz and 5.15–5.33 GHz. The CST microwave studio tool is used to validate the result.