The Design of an Inset Fed Wide Band Antenna Operating from 23 to 30 GHz for Wearable Smart Watch Applications

This paper presents a novel broad band antenna structure, that measure 7 x 8 x 1.6mm3 on Roger5880 substrate for installations in smart watches of the wearable device sector. Gain, reflection loss and radiation patterns, are investigated intensively. Good performance is shown with an excellent bandwidth of 23 to 30GHz, suitable for wearable devices. As the smart watch is worn on the wrist and may be brought near the mouth for speaking through the smart watch, the SAR is also examined using multilayer human hand wrist and near CST Voxel model Gustav's mouth. A highest SAR of 1.0654W/kg on a CST human mouth model Gustav was recorded when the antenna was installed at 3mm distance with an input power of 125mW at 28GHz which is within the permissible limit of 2W/Kg for 10grams of tissue. According to the findings, the suggested antenna is ideally suited for smart watch and WBAN applications since its SAR value is mostly in compliance with Federal Communications Commission (FCC) regulations.