Design & Analysis of Compact Printed Monopole Antenna with Defected Ground Plane for Wideband Applications

In this paper, design and analysis of a compact printed monopole antenna with defected ground plane for wideband applications has been done. The proposed antenna has been designed on a FR4-epoxy substrate with dielectric constant 4.4 and height is 1.6mm. In this proposed antenna design, the complimentary split ring resonators (CSRRs) are etched from both patch as well as ground plane so as to work for wideband applications. The antenna has been fabricated with optimized dimensions and then tested. The proposed antenna is fed by microstrip line feed and has been designed and simulated by High Frequency Structure Simulator (HFSS version 13.0). The proposed antenna operates on S-band (2-4 GHz), C-band (4-8 GHz), X-band (8-12 GHz) and KU-band (12-18 GHz) applications. In the simulated results, the antenna design operates at four frequencies 2.7 GHz, 4.4 GHz, 6.6 GHz and 10.8 GHz with return losses of -18.39 dB, -13.79 dB, -17.10 dB and -22.82 dB. The gains at these four frequencies are 12.5 dB, 5.14 dB, 4.74 dB and 1.83 dB. In the measured results, the antenna design operates at four frequencies 2.6 GHz, 4.97 GHz, 6.13 GHz and 10.97 GHz with return losses of -18.10 dB, -25.80 dB, -23.10 dB and -17.30 dB.