A Coplanar Waveguide Fed Rectangular Reconfigurable Patch Antenna with Switchable Strips for Polarization Diversity

Sulakshana Chilukuri; Anjaneyulu Lokam

doi:10.14429/dsj.64.4807

Sulakshana Chilukuri National Institute of Technology, Warangal
Anjaneyulu Lokam National Institute of Technology, Warangal

DOI: https://doi.org/10.14429/dsj.64.4807

Keywords: Reconfigurable antenna, polarization diversity, circular polarization, patch antenna, coplanar waveguide feed

Abstract

A compact single feed rectangular patch antenna with reconfigurable circular polarization has been proposed in this paper. The basic antenna structure is a rectangular patch of dimensions 10 mm x 15 mm printed on a thin FR4 substrate of thickness 3 mm. Two rectangular strips are connected through switches at sideways of the main patch to get polarization diversity. The polarization of the proposed antenna can be reconfigured between left hand circular polarization (LHCP) and right hand circular polarization (RHCP) by the current path, which is changed by operating the switches in ON and OFF modes. The antenna is designed and simulated using IE3D MoM based electromagnetic simulator. The simulated results show good return loss, radiation pattern, axial ratio and acceptable gain at the operating frequency. The antenna has around 15 % effective impedance bandwidth over 4.0 GHz - 4.8 GHz frequency band at a maximum gain of 3.0 dBi with polarization diversity.

Defence Science Journal, Vol. 64, No. 1, January 2014, DOI:10.14429/dsj.64.4807

Author Biographies

Sulakshana Chilukuri, National Institute of Technology, Warangal

Ch. Sulakshana received BTech (ECE) from G. Narayanamma Inst. of Technology and Science, in 2007. She received MTech (Communication Systems) from in National Institute of Technology Tiruchirappalli, India in 2010 and currently pursuing PhD degree from National Institute of Technology Warangal, India. Her field of study is reconfigurable antennas and other areas of interest are microwave engineering and antenna wave propagation. She has published 12 research papers in international journals and conferences.

Anjaneyulu Lokam, National Institute of Technology, Warangal

Dr L. Anjaneyulu obtained his BTech (ECE) in 1989, MTech in 1991 and PhD in 2010 from N.I.T, Warangal, India. He has 22 papers to his credit in national and international conferences and journals. His areas of interest include computer networks, electromagnetic field theory, microwave and radar engineering, and Neural networks and Fuzzy logic systems.