A simple and compact broadband circularly polarized circular slot antenna for WLAN/WiMAX/DBS applications

Shilpee Patil; Anil Kumar Singh; Vijay Kumar Pandey; Binod Kumar Kanaujia; Anil Kumar Pandey

doi:10.1515/freq-2021-0118

Article

A simple and compact broadband circularly polarized circular slot antenna for WLAN/WiMAX/DBS applications

Shilpee Patil , Anil Kumar Singh , Vijay Kumar Pandey , Binod Kumar Kanaujia and Anil Kumar Pandey

Published/Copyright: October 12, 2021

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From the journal Frequenz Volume 76 Issue 3-4

Abstract

A simple and compact circularly polarized broadband circular slot antenna is proposed for WLAN/WiMAX/DBS applications. The main objective of this work is to design a microstrip line fed broadband circularly polarized antenna that is achieved by introducing an asymmetric perturbation over the circular slot onto the ground plane. A broad axial ratio bandwidth is achieved by using a small circular segment cut into the circular slotted ground and by adding a short stub on the feedline. To achieve a broad impedance bandwidth, a horizontal strip onto the slotted ground is placed just above the feed line on the opposite side. The proposed antenna is fabricated with an overall dimension of 20 × 20 × 1.6 mm³ (0.34λ_o × 0.34λ_o × 0.03λ_o, where λ_o represents the free-space wavelength at the center operating frequency). It is found that the impedance bandwidth of 75.82% ranges from 3.21 to 7.13 GHz and the 3 dB axial ratio (AR) bandwidth reaches 54.27% from 3.8 to 6.6 GHz. Throughout this paper, the improvement and validation process of the proposed antenna outcomes to accomplish desired characteristics are discussed.

Keywords: Axial Ratio Bandwidth; broadband antenna; circular polarization; circular slot antenna; impedance bandwidth

Corresponding author: Shilpee Patil, Department of Electronics and Communication Engineering, Noida Institute of Engineering and Technology, Greater Noida, UP, India, E-mail: shilpeepatil21@gmail.com

Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: None declared.
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2021-05-08

Accepted: 2021-10-01

Published Online: 2021-10-12

Published in Print: 2022-04-26

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Articles in the same Issue

https://doi.org/10.1515/freq-2021-0118

Keywords for this article

Axial Ratio Bandwidth; broadband antenna; circular polarization; circular slot antenna; impedance bandwidth