Prasanna G. PAGA, H. C. NAGARAJ, K. S. SHASHİDHARA, Veerendra DAKULAGI, Kim Ho YEAP

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

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.

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