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Slot loaded EBG-based metasurface for performance improvement of circularly polarized antenna for WiMAX applications

Published online by Cambridge University Press:  10 September 2019

Alka Verma Open the ORCID record for Alka Verma [Opens in a new window] ,
Anil Kumar Singh ,
Neelam Srivastava ,
Shilpee Patil  and
Binod Kumar Kanaujia Open the ORCID record for Binod Kumar Kanaujia [Opens in a new window]
Alka Verma*
Affiliation:
Department of Scholar, Electronics Engineering, A.K.T.U., Lucknow, Uttar Pradesh, India
Anil Kumar Singh
Affiliation:
Department of Electronics and Instrumentation Engineering, F.E.T, M.J.P. Rohilkhand University, Bareilly, Uttar Pradesh243006, India
Neelam Srivastava
Affiliation:
Rajkiya Engineering College, Kannauj, Uttar Pradesh, India
Shilpee Patil
Affiliation:
Department of Electronics and Communication Engineering, Noida Institute of Engineering and Technology, Greater Noida, Uttar Pradesh, India
Binod Kumar Kanaujia
Affiliation:
School of Computational and Integrative Sciences, Jawaharlal Nehru University, New Delhi, India
*
Author for correspondence: Alka Verma, E-mail: alkasinghmail@rediffmail.com
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Abstract

In this paper, an electromagnetic band gap (EBG) metasurface (MS) superstrate-based circularly polarized antenna for the WiMAX (3.5 GHz) band is proposed. The proposed structure comprises a 2 × 2 slot-loaded rectangular patch MS array that can be perceived as a polarization-dependent EBG MS superstrate. Furthermore, to achieve circular polarization, the proposed antenna has an inclined coupling slot onto the ground with a conventional coplanar waveguide feed line. The proposed antenna has a compact structure with a low profile of 0.037λ0 (λ0 stands for the free-space wavelength at 3.48 GHz) and a ground size of 30 × 30 mm2. The measured results show that the −10 dB impedance bandwidth for the proposed antenna is 34.6% and the 3-dB axial ratio (AR) bandwidth is 6.8% with a peak gain of 3.91 dBi in the desired operating band. Good agreement between the simulated and the measured results verifies the performance of the proposed antenna.

Keywords

Metasurface superstrateinclined coupling slotcircular polarization
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 12 , Issue 3 , April 2020 , pp. 212 - 220
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2019

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