Performance evaluation of SMS rectangular microstrip patch antennas

This paper presents a new application for Slow-wave Microstrip (SMS) technique in miniaturization of rectangular patch antennas. The designed patches resonate around the Industrial Scientific and Medical (ISM) radio bands, 2.45 GHz, and were optimized using HFSS. The SMS design technology used is based on the insertion of via holes within multilayer substrate. The simulation results show that the patch area is reduced up to 32% while keeping an acceptable antenna gain (6.22dB) and unmodified other electrical characteristics.