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Designing of a circularly polarized reconfigurable graphene-based THz patch antenna with cross-shaped slot

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Abstract

In this paper, a circular patch antenna with cross-shaped slot is designed. Graphene has been used in the design of the said antenna. The proposed antenna structure has frequency reconfigurable capability. The central frequency of the antenna is considered to be 1.6 THz as required by the design. The cross-shaped slot reconfigurable graphene-based microstrip patch antenna is realized on a SiO2 substrate. In the center of the designed circular patch antenna, a slot is placed in the form of two orthogonal physical arms, or in other words, a cross shape. And as a result, the distribution of the final current of the antenna will have an orthogonal domain in the farfield. Which will have a phase difference of 90 degrees. And this is the realization of circular polarization. In the range of 0.5 THz to 2 THz, cross-shaped slot reconfigurable graphene-based microstrip patch antenna has favorable conditions in terms of matching and polarization. Also, S11 is less than − 15 dB for the target range. The axial ratio is obtained less than 2 dB. Obtaining an axial ratio below 3 dB is ideal for providing circular polarization. Radiation efficiency is about 59%. Finally, the results of radiation efficiency, 2D and 3D radiation patterns, E-field distribution, H-field distribution and surface current distribution have been considered.

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Acknowledgements

This research was supported by Semnan University.

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Conceptualization, Methodology, Software, Validation, and Writing – original draft, review & editing: NK. Supervision, Project administration: FTH. Supervision, Project administration: PR.

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Correspondence to Narges Kiani.

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We the undersigned declare that the manuscript entitled “Designing of a circularly polarized reconfigurable graphene-based THz patch antenna with cross-shaped slot” is original, has not been fully or partly published before, and is not currently being considered for publication elsewhere. Also, results are presented clearly, honestly, and without fabrication, falsification, or inappropriate data manipulation. We confirm that the manuscript has been read and approved by all named authors and that there are no other persons who satisfied the criteria for authorship but are not listed. We further confirm that the order of authors listed in the manuscript has been approved by all of us.

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Kiani, N., Hamedani, F.T. & Rezaei, P. Designing of a circularly polarized reconfigurable graphene-based THz patch antenna with cross-shaped slot. Opt Quant Electron 55, 356 (2023). https://doi.org/10.1007/s11082-023-04617-y

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  • DOI: https://doi.org/10.1007/s11082-023-04617-y

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