Improving the Performances of Microstrip Antenna Array using Defected Ground Structure
Pratistha Brahma1, Banani Basu2

1Pratistha Brahma*, Department of Electronics and Communication Engineering, National Institute of Technology, Silchar, Silchar, Cachar, Assam , India. Email:
2Banani Basu, Department of Electronics and Communication engineering, National Institute of Technology, Silchar, Silchar, Assam, Cachar, India.
Manuscript received on December 13, 2019. | Revised Manuscript received on December 21, 2019. | Manuscript published on January 10, 2020. | PP: 1081-1086 | Volume-9 Issue-3, January 2020. | Retrieval Number: B7527129219/2020©BEIESP | DOI: 10.35940/ijitee.B7527.019320
Open Access | Ethics and Policies | Cite | Mendeley
© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (

Abstract: In this paper, a two elements antenna array with defective ground structure (DGS) has been designed to achieve significant gain, polarization purity and reduced mutual coupling. A 3 port Wilkinson power divider has been designed at 4.5 GHz frequency to obtain equal power distribution at the output ports. Two Rectangular microstrip patch antennas with DGS at the corners yield improved gain, impedance matching and polarization purity in both E and H plane. The reduction of mutual coupling and side lobe level (SLL) have been achieved by placing the dumbbell shaped DGS bellow the feed line of the power divider. The radiation performances obtained using the fabricated prototype agrees well with that of the simulated one. This array has been designed for C-band application.
Keywords: Wilkinson Power Divider (Wpd), Defective Ground Structure (Dgs), Gain, Mutual Coupling, Sll.
Scope of the Article: Microstrip antenna