A A New Approach in Realisation of DGS Microstrip Patch Antennas With Fractal Geometry

RV Hara Prasad; Damera Vakula; M Chakravarthy

doi:10.14429/dsj.73.18561

RV Hara Prasad DRDO-Defence Laboratory, Jodhpur – 342 011, India https://orcid.org/0000-0002-1317-6393
Damera Vakula National Institute of Technology, Warangal – 506 004, India https://orcid.org/0000-0002-3781-4142
M Chakravarthy DRDO-Defence Electronics Research Laboratory, Hyderabad – 500 005, India

DOI: https://doi.org/10.14429/dsj.73.18561

Keywords: Defected ground structure, Fractal, Sierpinski carpet, square slots, Square slots, Circular slots, Microstrip patch antenna

Abstract

A new approach in realization of Defected Ground Structure Microstrip Patch antennas with Fractal Slots cut
in the ground plane has been presented. The presented approach resulted in miniaturization of radiating patches and avoidance of multiple resonances which are prime considerations in antennas for Wi-Fi applications. A rectangular Microstrip patch is taken as a basic radiating patch. In the ground plane, square and circular slots following Sierpinski Carpet Fractal Geometry are cut resulting in Defected Ground Structure (DGS) Microstrip Patch antenna. The antenna is designed to operate at 2.4 GHz and the performance characteristics have been simulated using HFSS software. The proto-type DGS Microstrip patch antenna with square fractal slots is fabricated and tested. The measured results are in good agreement with the simulation studies. The technique has also resulted in size reduction of radiating patch compared to the standard microstrip patch antenna operating at the same frequency.