Design and Analysis of Printed Monopole Antenna With and Without CSRR in the Ground Plane for GSM 900 and Wi-Fi

Abstract

A dual-band printed monopole antenna with and without complementary split-ring resonator (CSRR) has been designed on an FR4 substrate of permittivity 4.4 and thickness 1.6 mm with a line feeding technique that finds application in GSM 900 and Wi-Fi. Two conducting strips were used to tune to 0.9 GHz and 2.4 GHz. The reflection coefficient values reported were −19.8 dB at GSM 900 and −6.4 dB at Wi-Fi. The novelty of the proposed work lies in using two concentric circular split rings etched beneath the antenna on the ground plane with a suitable gap g1 and g2. The outer ring was tuned to GSM 900 and the inner ring was tuned to Wi-Fi. By suitably adjusting the gap widths g1 and g2 and the ring thickness, the simulated value of the reflection coefficient showed a considerable improvement of −25.32 dB and −12.07 dB along with a gain of 6.17 dBi and 7.286 dBi in the lower- and the upper-frequency bands, respectively. The antenna dimensions were 100 mm × 40 mm × 1.6 mm.