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Compact circularly polarized antenna with wide axial ratio bandwidth using modified quasi-self-complementary structure

Published online by Cambridge University Press:  26 July 2018

Gunjan Srivastava*
Affiliation:
Department of Electronics and Electrical Communication Engineering, Indian Institute of Technology Kharagpur, West Bengal-721302, India
*
Author for correspondence: Gunjan Srivastava, E-mail: [email protected]

Abstract

A compact circularly polarized antenna with wide axial ratio bandwidth (ARBW) using quasi-self-complementary (QSC) structure is presented. A 3-dB ARBW is achieved by shortening the ground plane of the QSC structure. Furthermore, the wide ARBW is obtained by the introduction of a stepped stub in the extended ground plane of the QSC structure. The antenna is fabricated on a FR4 substrate with the overall dimensions of 25 mm × 22 mm × 0.8 mm. The proposed antenna has an impedance bandwidth of 5.9 GHz (2.4–8.3 GHz, 110%) and 3 dB ARBW of 1.6 GHz (2.4–4 GHz, 50%). A peak gain of 1–3 dBi is observed within the 3 dB ARBW.

Type
Research Papers
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2018 

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