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Optical and Quantum Electronics

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01-10-2023

Implementing reconfigurable circularly polarized two port MIMO DRA for THz applications

Authors: Patri Upender, Amarjit Kumar

Published in: Optical and Quantum Electronics | Issue 10/2023

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Abstract

A new ultra-wideband two-port MIMO Dielectric Resonator Antenna (DRA) based on defected ground structure is introduced for Terahertz (THz) frequency applications. The antenna utilizes two silicon-based Dielectric Resonators (DRs) as radiators. It exhibits an ultra-wideband response with a bandwidth of 14.5 THz (9.5 THz–24 THz) and offers high isolation of ≤ − 20 dB across the operating frequency range. Additionally, it achieves dual-band circular polarization with a 3-dB Axial Ratio (AR) Bandwidth (ARBW) of 37.55% (9.82 THz–14.36 THz) and 30.87% (16.9 THz–23.07 THz) respectively. The antenna demonstrates a high radiation efficiency of 95.02% and a peak gain of 8.76 dB. By varying the feed lengths, the antenna enables polarization reconfigurability, which is advantageous for future THz wireless systems. Moreover, the antenna exhibits improved MIMO diversity performance, characterized by parameters such as CCL < 0.5 bps/Hz, MEG ≤ − 3 dB, TARC ≤ − 10 dB, DG ≈ 10 dB, and ECC < 0.01. To enhance its performance, the DRA is coated with graphene, enabling tunability in frequency response and axial ratio (AR) response, thereby increasing the Impedance Bandwidth (IBW). These unique characteristics make the proposed MIMO DRA well-suited for various THz Nanodevice applications, including Terahertz wave Radar, Health care, Astronomical radiometric applications, and future THz wireless communication.

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Title: Implementing reconfigurable circularly polarized two port MIMO DRA for THz applications
Authors: Patri Upender
Amarjit Kumar
Publication date: 01-10-2023
Publisher: Springer US
Published in: Optical and Quantum Electronics / Issue 10/2023
Print ISSN: 0306-8919
Electronic ISSN: 1572-817X
DOI: https://doi.org/10.1007/s11082-023-05188-8

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