Investigation on DGS Based Line FED Multiband Patch Antenna for Wireless Applications

The novel antenna resonating for multiple bands using Defected Ground Structure (DGS) has been presented in this paper. The antenna is designed on FR-4 substrate with the dimensions 35×24×1.6mm³ and Loss tangent (tanδ) of 0.02, dielectric constant ε = 4.4. The patch is rectangular shape forming as the top layer on the substrate and fed with line feeding then the ground plane with multiple notches forming as inverted T-shape linked from tail to tail using rectangular notch and the combination forms as Defected Ground Structure (DGS). The antenna is designed and studied the parameters like return loss, VSWR, Gain, and current distribution. The antenna has achieved a very good response in all aspects and can be used for multiple applications. The effect of change in feedline width with center-fed has also been studied in this paper. The antenna is simulated using the HFSS tool.