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Microstrip-line-fed inverted L-shaped circularly polarized antenna for C-band applications

Published online by Cambridge University Press:  28 April 2021

Karunesh Srivastava Open the ORCID record for Karunesh Srivastava [Opens in a new window] ,
Brijesh Mishra Open the ORCID record for Brijesh Mishra [Opens in a new window]  and
Rajeev Singh Open the ORCID record for Rajeev Singh [Opens in a new window]
Karunesh Srivastava
Affiliation:
Department of Electronics and Communication, University of Allahabad, Allahabad, UP211002, India
Brijesh Mishra
Affiliation:
Department of Electronics and Communication, Madan Mohan Malaviya University of Technology, Gorakhpur, UP273010, India
Rajeev Singh*
Affiliation:
Department of Electronics and Communication, University of Allahabad, Allahabad, UP211002, India
*
Author for correspondence: Rajeev Singh, E-mail: rsingh68@gmail.com
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Abstract

A circularly polarized stub-matched inverted L-shaped antenna for C-band applications is presented in this communication. Antenna parameters of inverted L-shape on the radiating patch and slits, notch, square strips and stub on the ground plane and the effect of these are analyzed. The proposed optimized antenna (A5: 0.54λ0 × 0.54λ0 × 0.02λ0 mm3) is selected among antennas (A1 – A5) with 5.1 GHz design frequency after simulation through high-frequency structure simulator (HFSS). Circular polarization is obtained by introducing stub/perturbation on the ground plane. By introducing stub, the highest measured (S11 < − 10 dB) impedance bandwidth of 50.9% (3.48 – 5.86 GHz) is observed amongst the reported and compared bandwidths. Peak gain of 5.32 dBi and 3 dB axial ratio bandwidth of 16.2% (4.71 – 5.54 GHz) is reported in the present work. An antenna is useful in the entire downlink frequency (3.7 – 4.2 GHz) of the C band.

Keywords

Axial ratioinverted L-shaperight-hand circular polarization (RHCP)stub matching
Type
Antenna Design, Modeling and Measurements
Information
International Journal of Microwave and Wireless Technologies , Volume 14 , Issue 4 , May 2022 , pp. 502 - 510
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Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press in association with the European Microwave Association

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