Suppression of Harmonic of Microstrip Patch Antenna Using Defected Ground and Defected Microstrip Structure

摘要

Defected ground Structure (DGS) and Defected Microstrip Structure (DMS) have been developed to improve characteristics of microwave devices and circuits, due to its band-stop property. It’s noticed that a spurious harmonic at 7.6 GHz appears in the antenna. In this paper, an effective technique of suppression of harmonics is proposed by using a dumb-bell shaped DGS and spiral shaped DMS in our antenna, which eliminates the 7.6 GHz undesirable mode. The dimensions of our antenna are optimized by using CST Microwave Studio tool.