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Reduction of the mutual coupling in patch antenna arrays based on EBG by using a planar frequency-selective surface structure

Published online by Cambridge University Press:  29 September 2015

Ehsan Beiranvand ,
Majid Afsahy  and
Vahid Sharbati
Ehsan Beiranvand
Affiliation:
Faculty of Electrical and Computer Engineering, Semnan University, Semnan, Iran. Phone: +98 9113703981
Majid Afsahy
Affiliation:
Faculty of Electrical and Computer Engineering, Semnan University, Semnan, Iran. Phone: +98 9113703981
Vahid Sharbati*
Affiliation:
Faculty of Electrical and Computer Engineering, Semnan University, Semnan, Iran. Phone: +98 9113703981
*
Corresponding author: V. Sharbati Email: [email protected]
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Abstract

This paper describes a new configuration of frequency-selective structure (FSS) structures to reduce mutual coupling between the radiating elements. Also, the antenna performance before and after the implementation of FSS have been investigated. The proposed configuration provides an improvement in mutual coupling by 14 dB (measured value) with a reduced edge-to-edge spacing of 23 mm. The reduction of mutual coupling between antenna elements is interesting in the electromagnetic and antenna community. The use of electromagnetic band-gap structures constructed by microstrip technology is a way to appease the mutual coupling problem. Periodic structures such as FSS can help in the reduction of mutual coupling using their ability of suppressing surface waves propagation in a given frequency range. The goal of this present study is to use it in patch antenna arrays, keeping both the element separation smaller than λ0 for grating lobes evasion and the patch antenna size large enough to have good antenna directivity. The results showed that the proposed configuration eliminates disadvantages of similar structures presented in the previous works.

Keywords

Mutual coupling reductionPatch antenna arrayFrequency-selective surface (FSS)Electromagnetic band gap (EBG)
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 9 , Issue 2 , March 2017 , pp. 349 - 355
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2015 

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