ABSTRACT
Wireless communication and the medical industry have undergone continuous growth in the last few years. Low-profile compact antennas are crucial in the development of wearable human biomedical systems. Printed antennas possess attractive features such as low profile, flexible, light weight, small volume, and low production cost. They may be used as wearable antennas. Microstrip antennas are printed on a dielectric substrate with low dielectric losses. In the transmission line model (TLM) of patch microstrip antennas the antenna is represented as a two slots connected by a transmission line. The major disadvantage of single layer microstrip antennas is narrow bandwidth. By designing a double-layer microstrip antenna we can achieve a wider bandwidth. Two-layer microstrip antennas may be the best antenna choice for wideband wearable systems. The fringing fields, which are responsible for radiation, are shorted on the far end, so only the fields nearest the transmission line radiate.
