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A micro-scaled graphene-based tree-shaped wideband printed MIMO antenna for terahertz applications

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Abstract

A tree-shaped graphene-based microstrip multiple-input and multiple-output (MIMO) antenna for terahertz applications is proposed. The proposed MIMO antenna is designed on a 600 × 300 μm2 polyimide substrate. The designed MIMO antenna provides a wide impedance bandwidth of 88.14% (0.276–0.711 THz) due to the suggested modifications in the antenna configuration. The MIMO design parameters like total active reflection coefficient (TARC), mean effective gain (MEG), envelope correlation coefficient (ECC) and diversity gain (DG), channel capacity loss (CCL) are evaluated, and their values are found within acceptable limits. The proposed MIMO structure offers MEG ≤ − 3.0 dB, TARC ≤ − 10.0 dB, DG ≈ 10 dB, CCL < 0.5 bps/Hz/s and ECC < 0.01 at the resonant frequency. At the resonant frequency, the isolation between the radiating elements of the proposed MIMO antenna is recorded as − 52 dB. The variations in operating frequency and S-parameters are also analyzed as a function of the chemical potential (μc) of the graphene material. The parametric analysis, structural design evolution steps, surface current distribution, antenna characteristics parameters and diversity parameters are discussed in detail in this paper. The designed MIMO antenna is suitable for high-speed short-distance communication, video-rate imaging, biomedical imaging, sensing and security scanning in the THz frequency band.

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Authors and Affiliations

  1. Department of Electronics & Communication Engineering, Vasireddy Venkatadri Institute of Technology, Nambur, Guntur, Andhra Pradesh, India

    K. Vasu Babu

  2. Department of Electronics and Communication Engineering, IMPS College of Engineering and Technology, Malda, West Bengal, India

    Sudipta Das

  3. Department of Electronics and Communication Engineering, National Institute of Technology, Patna, Bihar, India

    Gaurav Varshney

  4. Department of Electronics and Communication Engineering, VFSTR (Deemed To Be University), Vadlamudi, Andhra Pradesh, India

    Gorre Naga Jyothi Sree

  5. Department of Electronics and Communication Engineering, Koneru Lakshmaiah Education Foundation, Guntur, Andhra Pradesh, India

    Boddapati Taraka Phani Madhav

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  1. K. Vasu Babu
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Vasu Babu, K., Das, S., Varshney, G. et al. A micro-scaled graphene-based tree-shaped wideband printed MIMO antenna for terahertz applications. J Comput Electron 21, 289–303 (2022). https://doi.org/10.1007/s10825-021-01831-3

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