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Improved polarization purity for circular microstrip antenna with defected patch surface

Published online by Cambridge University Press:  07 October 2014

Abhijyoti Ghosh ,
Sudip Kumar Ghosh ,
Dia Ghosh  and
Sudipta Chattopadhyay
Abhijyoti Ghosh
Affiliation:
Department of ECE, Mizoram University, Aizawl, Mizoram 796004, India
Sudip Kumar Ghosh
Affiliation:
Department of ECE, Siliguri Institute of Technology, P.O-Sukna, Darjeeling, Siliguri, WB 734009, India. Phone: +91 9434813286
Dia Ghosh
Affiliation:
Department of ECE, Siliguri Institute of Technology, P.O-Sukna, Darjeeling, Siliguri, WB 734009, India. Phone: +91 9434813286
Sudipta Chattopadhyay*
Affiliation:
Department of ECE, Siliguri Institute of Technology, P.O-Sukna, Darjeeling, Siliguri, WB 734009, India. Phone: +91 9434813286
*
Corresponding author: S. Chattopadhyay Email: sudipta_tutun@yahoo.co.in
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Abstract

A simple and compact microstrip antenna of circular geometry with circular cut defected patch surface has been proposed for significant suppression of cross-polarized (XP) radiation compared with maximum co-polarized gain without affecting the co-polarized radiation pattern at its dominant mode. This will enhance the polarization purity in the radiation performance of the proposed antenna. About 27–28 dB isolation between co-polarized and XP radiations is achieved with the proposed structure. The present structure is simple and easy to develop commercially. The investigation of the new structure is carried out with a view to eliminate orthogonal resonance, which is generally attributed for high XP radiation from the microstrip patch antenna with conventional circular geometry. Comprehensive study on the resonance and radiation characteristics of the new geometry is presented. The present investigation provides an insightful visualization-based understanding of XP suppression with the present structure.

Keywords

Circular microstrip antennaCross polarized radiationDominant modeOrthogonal mode
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 8 , Issue 1 , February 2016 , pp. 89 - 94
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2014 

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References

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