Defected Ground Structure (DGS) based microstrip patch Antenna for C-Band Applications

Abstract

Microstrip patch antenna with defects in the ground plane is proposed for C-Band applications. The defects or slots in ground plane are referred to as Defected Ground Structure (DGS) with shapes of L, U, I, E, Square has been presented. The antenna designs proposed here has shown good enhancement in Bandwidth (BW) and Return loss (S₁₁). High Frequency Structure Simulator (HFSS) is used to found the optimized performance parameters of the proposed antenna. The proposed antennas resonate in C-band at a frequency of about 5GHzwith bandwidth of nearly 400 MHz. A very good return loss of about -41.37dB was obtained for E-shaped slot in ground.  Also, improvement in return loss can be observed for U- shaped slot and Square shaped slot.