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A multi-layer approach of orthogonally fed circularly polarized microstrip array antenna for enhanced gain

Published online by Cambridge University Press:  08 March 2019

Muhammad Asad Rahman*
Affiliation:
Saga University, 1 Honjo-machi, Saga-shi, Saga 840-8502, Japan
Eisuke Nishiyama
Affiliation:
Saga University, 1 Honjo-machi, Saga-shi, Saga 840-8502, Japan
Md. Azad Hossain
Affiliation:
Faculty of Electrical and Computer Engineering, Chittagong University of Engineering and Technology, Chittagong-4349, Bangladesh
Quazi Delware Hossain
Affiliation:
Faculty of Electrical and Computer Engineering, Chittagong University of Engineering and Technology, Chittagong-4349, Bangladesh
Ichihiko Toyoda
Affiliation:
Saga University, 1 Honjo-machi, Saga-shi, Saga 840-8502, Japan
*
Author for correspondence: Muhammad Asad Rahman E-mail: asad31@ceng.ec.saga-u.ac.jp

Abstract

A new circularly polarized microstrip array antenna using the orthogonal feed technique is proposed in this paper. The antenna has a multi-layer structure and a new 3-way power divider employing the both-sided microwave integrated circuit technology is designed to configure the feed network of the array. Circular polarization (CP) is realized by creating a quadrature phase difference between orthogonal feed circuits of the patches. The multi-layer structure gives flexibility to adjust the patch spacing that helps to reduce the sidelobe level of the antenna. It is found that the multi-layer structure exhibits a gain of about 2 dB higher than that of a single layer structure by means of sidelobe reduction. The proposed structure also exhibits good CP performances that are verified by a good agreement of measured and simulated results. Simple and compact structure makes the antenna suitable for various wireless applications.

Type
Research Papers
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2019 

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