Title: Design and optimisation of a zeroth order resonant antenna along with experimental verification for wireless applications

Authors: K.L. Sheeja; Prasanna Kumar Sahu; Santanu Kumar Behera

Addresses: N.I.T. Rourkela, Rourkela 769008, Odisha, India ' N.I.T. Rourkela, Rourkela 769008, Odisha, India ' N.I.T. Rourkela, Rourkela 769008, Odisha, India

Abstract: In this paper, optimisation and experimental verification of a compact zeroth order resonant antenna is presented. It is observed that an antenna can be tuned to a desired working frequency by adjusting the inductive via radius. The antenna is subsequently optimised using HFSS simulation software. Pattern search optimisation is carried out to determine the optimum via radius to achieve minimum reflection coefficient with enhanced bandwidth. Using optimisation we achieved dual band backward wave with a bandwidth of about 2% at 4.28 GHz. After designing and optimisation the antenna is analysed for its performance. The proposed antenna is measured at Antenna Measurement Facility (AMF), ISRO, Ahmedabad. A good agreement between the measured and the simulated results validates the design. The simulated bandwidth at 3.695 GHz covers the IEEE 802.11 wireless local-area network (WLAN) standards. The designed compact antenna is most suitable for precise wireless applications having good radiation characteristics with wide coverage area.

Keywords: metamaterials; composite transmission lines; right-left handed transmission line; backward wave; electrically small antennas; dual mode; zeroth order resonant antennas; wireless LANs; WLANs; local area networks; optimisation; antenna design; HFSS simulation.

DOI: 10.1504/IJSISE.2015.067051

International Journal of Signal and Imaging Systems Engineering, 2015 Vol.8 No.1/2, pp.105 - 114

Received: 04 Aug 2011
Accepted: 19 Jul 2012
Published online: 25 Jan 2015 *

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