ABSTRACT
Wearable compact antennas are a major part of every wearable fifth-generation communication system, Internet of things and biomedical system. Several types of antennas are employed as wearable antennas. Printed dipoles, microstrip antennas, slot antennas and loop antennas are used as wearable antennas. Compact efficient antennas significantly affect the electrical performance of wearable communication and biomedical systems. The antennas presented in this chapter may be linearly or dually polarized. Design considerations, computational results and measured results on the human body of several compact wideband microstrip antennas with high efficiency are presented in this chapter. For example, the compact dually polarized antenna dimensions are 5 × 5 × 0.05 cm. The antenna beam width is around 100°. The antenna gain is around 0–4 dBi. The proposed antennas may be used in wearable communication and medical radio frequency systems. Varactors may be used to tune the resonant frequency of antennas. S11 results for antennas for different belt thicknesses, shirt thicknesses and air spacing between the antennas and the human body are presented in this chapter.
