Performance analysis of periodic defected ground structure for cpw-fed microstrip antenna

Abstract

This research work presents a novel integration of periodic defected ground structure (PDGS) with coplanar waveguide (CPW)-fed microstrip antenna for enhancing its performance. DGS has been incorporated in microwave devices like filters and reflective surfaces for improving their performance characteristics. Additionally, the combination of DGS and the antenna is limited to offer polarization improvisation. In this paper, PDGS is used to enhance the fractional bandwidths of the antenna, which are obtained to be 43, 45, and 24% for 2.4, 5, and 7 GHz, respectively, supporting the multiband operation. The results are compared with CPW-fed microstrip antenna with woodpile electromagnetic band gap (EBG) structure-based ground surface. The comparison shows that PDGS offers better performance in fractional bandwidth and gain at all the three bands of operation of the antenna.