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Circularly polarized tunable graphene-patch over SiO2 substrate for THz applications

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Abstract

In this communication, a graphene-based radiator is designed and analyzed at THz frequency. A tilted dumbbell-shaped aperture is loaded on a graphene patch for creating degenerated orthogonal mode with 90° phase shift, which in turn produces circularly polarized (CP) waves. Graphene patch is placed over SiO2 substrate. Slot loading in graphene patch shifts the frequency band due to a reduction in effective permittivity. Another important feature of the proposed antenna is to provide a tunable feature in the frequency response and axial ratio by changing the chemical potential. The proposed antenna operates from 5.85 to 6.05 THz. 3-dB axial ratio is obtained from 5.85 to 5.95 THz. Good value of gain, as well as left-handed circular polarization characteristics, makes the proposed THz antenna in sensing applications.

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Authors and Affiliations

  1. Department of Electronics and Communication Engineering, Nagarjuna College of Engineering and Technology, Bangalore, Karnataka, India

    Nagesh Kallollu Narayanaswamy & Ajay Kumar Dwivedi

  2. Department of Electronics and Communication Engineering, Government Engineering College, Raichur, Karnataka, India

    Manju Ramrao Bhosle

  3. Department of Electronics and Communication Engineering, Sagi Ramakrishnam Raju Engineering College, Bhimavaram, Andhra Pradesh, India

    Krishna Kanth Varma Penmatsa

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  1. Nagesh Kallollu Narayanaswamy
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  2. Manju Ramrao Bhosle
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  3. Krishna Kanth Varma Penmatsa
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  4. Ajay Kumar Dwivedi
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Contributions

NKN: conceptualization and methodology, KKVP: writing—revised draft preparation; MRB: analysis and investigation, AKD: writing—original draft preparation and Supervision.

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Correspondence to Ajay Kumar Dwivedi.

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Narayanaswamy, N.K., Bhosle, M.R., Penmatsa, K.K.V. et al. Circularly polarized tunable graphene-patch over SiO2 substrate for THz applications. Opt Quant Electron 54, 550 (2022). https://doi.org/10.1007/s11082-022-04000-3

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  • DOI: https://doi.org/10.1007/s11082-022-04000-3

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