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A CPW-fed reconfigurable patch antenna with circular polarization diversity

Published online by Cambridge University Press:  17 July 2014

Ch. Sulakshana  and
L. Anjaneyulu
Ch. Sulakshana*
Affiliation:
Department of Electronics and Communication Engineering, National Institute of Technology, Warangal, AP, India. Phone: +91 9246933895
L. Anjaneyulu
Affiliation:
Department of Electronics and Communication Engineering, National Institute of Technology, Warangal, AP, India. Phone: +91 9246933895
*
Corresponding author: Ch. Sulakshana Email: [email protected]
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Abstract

This paper presents a simple and compact coplanar waveguide (CPW)-fed circular-shaped reconfigurable patch antenna with a switchable circular polarization (CP) sense. The circular patch is cut at the ends vertically and switches are introduced to connect the patch ends. By controlling the ON/OFF status of the two switches, the polarization of the antenna can be switched between two states: left-hand circular polarization and right-hand circular polarization. The patch is designed on a very thin RT Duroid substrate of dielectric constant (εr) of 2.2 and thickness of 0.254 mm. The overall antenna dimensions are 35 × 30 mm. The antenna is designed and simulated using finite-element method -based EM simulator, HFSS. For each switching condition the return loss curve, radiation pattern are obtained. Axial ratio curves for polarization diversity cases are also plotted. Parametric studies have been made in order to get optimized values for certain antenna dimensions such as thickness, CPW ground to feed gap, etc.

Keywords

Antenna DesignModelling and MeasurementsAntennas and Propagation for Wireless Systems
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 7 , Issue 6 , December 2015 , pp. 753 - 758
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2014 

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References

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