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Miniaturization and Gain Enhancement of Microstrip Patch Antenna Using Defected Ground with EBG

Dhawan Singh 1,2, Aditi Thakur 2,and Viranjay M. Srivastava 1
1. Department of Electronic Engineering, Howard College, University of KwaZulu-Natal, Durban - 4041, South Africa
2. Department of Electronics and Communication, Eternal University, Baru Sahib, Sirmour-173101, India

Abstract—In this research work, we have proposed an inset feed rectangular microstrip patch antenna operating at 2.45 GHz in the Industrial, Scientific and Medical (ISM) band for wireless communication. This conventional design of antenna has been modified with defected ground (DG) plane. When this is optimized back to 2.45 GHz, a miniaturization of 37.9 % of patch size has been achieved along with the enhancement in radiation performance. This design is then modified and loaded with mushroom-type Electronic Band-Gap (EBG) structure on the top of dielectric FR-4 substrates. This creates a band-gap region that suppresses the surface waves considerably, thus improves the overall performance and functionality of the proposed antenna. Radiation characteristics such as S-parameters, directivity, gain, efficiency, bandwidth, VSWR and Z11 of microstrip antenna have been performed and compared. The simulated results show that the antenna gain has been increased throughout the entire bandgap of EBG operating in 2.25 to 4.25 GHz. Moreover, rest of radiation performances remain highly preserved.
Index Terms—Dispersion, Electronic band-gap (EBG), Frequency selective surface (FSS), Metamaterial absorber (MMA), Radar Cross Section (RCS)

Cite: Dhawan Singh, Aditi Thakur, and Viranjay M. Srivastava, "Miniaturization and Gain Enhancement of Microstrip Patch Antenna Using Defected Ground with EBG," Journal of Communications, vol. 13, no. 12, pp. 730-736, 2018. Doi: 10.12720/jcm.13.12.730-736