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Related Experiment Video

Updated: Aug 25, 2025

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
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Efficient graphene-based circularly polarized MIMO antenna for THz applications.

ChunchulaSai Vamsi, Ajay Kumar Dwivedi, Gagandeep Bharti

    Applied Optics
    |October 18, 2022
    PubMed
    Summary

    This study presents a novel graphene-based Multiple-Input Multiple-Output (MIMO) antenna for terahertz (THz) applications. The designed antenna achieves circular polarization and bidirectional radiation, suitable for advanced biomedical uses.

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    Area of Science:

    • Electromagnetics and Applied Physics
    • Materials Science and Engineering
    • Antenna Theory and Design

    Background:

    • Terahertz (THz) technology requires efficient antennas for various applications.
    • Graphene offers unique electromagnetic properties for advanced antenna designs.
    • Multiple-Input Multiple-Output (MIMO) antennas enhance wireless communication performance.

    Purpose of the Study:

    • To design and analyze a novel graphene-based MIMO antenna for THz frequencies.
    • To achieve circular polarization and a bidirectional radiation pattern.
    • To evaluate antenna performance metrics such as mutual coupling and envelope correlation.

    Main Methods:

    • Design of a graphene patch antenna with an asymmetrical cross slot for circular polarization.

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  • Implementation of oppositely oriented antenna ports for bidirectional radiation.
  • Simulation and analysis of antenna parameters including frequency range, axial ratio, mutual coupling, and envelope correlation coefficient.

    • Main Results:

    • The proposed THz MIMO antenna operates from 4.67 to 4.87 THz.
    • Circular polarization is achieved with a 3 dB axial ratio between 4.76 and 4.81 THz.
    • Mutual coupling is below -35 dB, and a low envelope correlation coefficient is obtained due to pattern diversity.

    Conclusions:

    • The designed graphene-based THz MIMO antenna exhibits promising characteristics for advanced applications.
    • The antenna's unique features, including circular polarization and bidirectional radiation, make it suitable for biomedical applications.
    • The low mutual coupling and envelope correlation ensure efficient performance in a MIMO system.