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Reconfigurable circularly polarized capacitive coupled microstrip antenna

Published online by Cambridge University Press:  11 May 2016

Dinesh Kumar Singh ,
Binod Kumar Kanaujia ,
Santanu Dwari ,
Ganga Prasad Pandey  and
Sandeep Kumar
Dinesh Kumar Singh
Affiliation:
Department of Electronics Engineering, Indian School of Mines, Dhanbad, Jharkhand-826004, India
Binod Kumar Kanaujia*
Affiliation:
Department of Electronics and Communication Engineering, AIACTR, Delhi-110031, India. Phone: +9111 22048047
Santanu Dwari
Affiliation:
Department of Electronics Engineering, Indian School of Mines, Dhanbad, Jharkhand-826004, India
Ganga Prasad Pandey
Affiliation:
Department of Electronics and Communication Engineering, Maharaja Agrasen Institute of Technology, Delhi-110085, India
Sandeep Kumar
Affiliation:
Department of Electronics Engineering, Indian School of Mines, Dhanbad, Jharkhand-826004, India
*
Corresponding author: B.K. Kanaujia Email: [email protected]
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Abstract

The design and measurement of reconfigurable circularly polarized capacitive fed microstrip antenna are presented. Small isosceles right angle triangular sections are removed from diagonally opposite corners for the generation of circular polarization (CP) of axial ratio bandwidth of 11.1%. Horizontal slits of different lengths are inserted at the edges of the truncated patch to provide the dual-band CP and by switching PIN diodes across the slits ON and OFF, reconfigurable circularly polarized antenna is realized. The antenna shows dual-band behavior with reconfigurable CP. In order to enhance the operation bandwidth of the antenna, an inclined slot was embedded on the patch along with PIN diodes across the horizontal slits. This proposed antenna gave an impedance bandwidth of 66.61% (ON state) ranging from 4.42 to 8.80 GHz and 68.42% (OFF state) ranging from 4.12 to 8.91 GHz and exhibits dual-frequency CP with PIN diode in OFF state and single-frequency CP with PIN diode in ON state with good axial ratio bandwidth. The axial ratio bandwidth of 4.42, 2.35, and 2.72% is obtained from the antenna. The antenna has a similar radiation pattern in all the three different CP bands and almost constant gain within the bands of CP operation.

Keywords

Antennas and propagation for wireless systemsAntenna designModeling and measurements
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 9 , Issue 4 , May 2017 , pp. 843 - 850
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2016 

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