Abstract
This paper presents a millimeter wave band antenna designed for use in smartwatch wireless body area network (WBAN) applications. The proposed antenna is characterized by circular concentric rings, with a slit in the outer ring for the feed line. Antenna only performance and the impacts of the watch case with and without the screen, rubber strips, and its placement on a human wrist model were considered. The investigation focused on the antenna's impedance bandwidth, gain, efficiency, and radiation pattern at 28 GHz. The proposed antenna design was found to have workable bandwidth, high realized gain and efficiency, and good radiation patterns, making it suitable for use in WBAN applications.