Broadside coupled split ring resonator based multiband monopole patch antenna for wireless communication applications

The present work reports the development of a multiband monopole patch antenna by utilizing Broadside Coupled Split Ring Resonator (BCSRR) units. This antenna makes use of the resonant property of metamaterial BCSRR units for multiband frequency designing. Since the magnetic resonant frequency of the BCSRR depends on the effective capacitance and inductance of its rings, the geometrical parameters of the rings like inter planar distance between them, inner and outer radii, split widths and the dielectric material between the rings play important role in designing the radiating frequency bands of the proposed antenna. The desired frequencies for potential applications like Bluetooth, Wi-Fi and Wi-Max are thus achieved by proper designing of the BCSRR units. In this work, it is demonstrated that two additional frequencies can be radiated along with the monopole radiation by coupling two BCSRR units to the monopole. The fabricated antenna exhibits high return loss at 2.45 GHz and 2.75 GHz along with the monopole radiation around 5 GHz. The number of operating frequencies can be increased by adding more BCSRR units at various positions near to the monopole patch. The proposed antenna is compact, light weight and easy to design and fabricate when compared with the recently reported multiband monopole antennas. The good agreement between the experimental and simulated results shows that the proposed antenna is a suitable candidate for potential wireless applications. The different antennas for different applications in a single device can be replaced with the single proposed antenna.