Printed Monopole Antenna Loaded with Circular Split Ring Resonators (CSRRs) for Multi-band Operations

This paper presents the design of a printed monopole antenna with circular shapes of SRR – for compactness and multiband operation. The antenna consists of a rectangular patch element on the top plane fed by a microstrip feeding line and an SRR structure on the ground plane. It is observed that the monopole antenna with the circular SRR on the defected ground plane covers the Universal Mobile Telecommunications System (UMTS) (2.09 GHz), 5G (3.5 GHz), and Wireless Local Area Network (WLAN) (5.2/5.8 GHz) bands. The prototype of the proposed antennas was fabricated, measured, and presented for validation. Achieving multiband characteristics by integrating the single wideband monopole antenna with the SRR has the advantages of simplicity in the fabrications, compactness, and multiband achievement.