Implementing reconfigurable circularly polarized two port MIMO DRA for THz applications

Upender, Patri; Kumar, Amarjit

doi:10.1007/s11082-023-05188-8

Cited by 5 publications

(2 citation statements)

References 45 publications

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“…Terahertz (THz) frequency, occupies a unique electromagnetic (EM) spectrum characterized by its potential for diverse applications across various fields [1], [2], [3]. The THz region, often referred to as the "THz gap," bridges the gap between the microwave and infrared regimes, offering a wealth of opportunities for exploration and innovation.…”

Section: Introductionmentioning

confidence: 99%

VO₂-Graphene Ultrathin Films: Enabling Wideband Switchable and Tunable THz Absorption

Upender,

Harsha Vardhini,

Kumba

et al. 2024

IEEE Access

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This paper presents a groundbreaking advancement in terahertz (THz) technology through the introduction of a novel ultrathin absorber. Composed of vanadium dioxide (VO 2 ) and graphene, this absorber offers a non-metallic solution for wideband absorption, covering an impressive frequency range from 1.198 THz to 8.752 THz (7.554 THz). Our absorber exhibits exceptional tunable and switchable performance, a significant achievement considering the challenge of achieving frequency tunability across broadband absorption ranges, which was the primary focus of our research endeavor. Furthermore, our proposed absorber demonstrates remarkable characteristics, achieving up to 80% absorption even at high incidence angles of up to 80 o . Additionally, the absorber enhances Shielding Effectiveness in electromagnetic interference (EMI) shields and stealth systems, further highlighting its versatility and potential impact in various applications.INDEX TERMS Absorber, graphene, switchable, tunable, VO 2 , Wideband.

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Section: Introductionmentioning

confidence: 99%

VO₂-Graphene Ultrathin Films: Enabling Wideband Switchable and Tunable THz Absorption

Upender,

Harsha Vardhini,

Kumba

et al. 2024

IEEE Access

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“…Various devices are employed within the THz frequency range, including antennas for transmitting and receiving EM waves, absorbers, sensors, spectrometry equipment, and imegery systems, each serving diverse applications [4]- [10]. THz waves can penetrate various non-metallic materials, including biological tissues, without causing harm [11]- [13]. This property makes THz radiation ideal for non-invasive and label-free sensing of biomolecules, cells, and tissues.…”

Section: Introductionmentioning

confidence: 99%

A Compact Metamaterial Biosensor for Multi-Virus Detection With Tunability and High Incidence Angle Absorption

Upender,

Bharathi,

Sukriti

et al. 2023

IEEE Access

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In this research, we introduce a metamaterial biosensor designed for the detection of various viruses. The proposed sensor configuration comprises four square split ring resonators (SRR) coupled with a central graphene ring. The strong coupling between SRR and graphene ring results in near-perfect absorption at a frequency of 1.354 THz. To enhance versatility, the sensor's performance can be tuned and controlled by adjusting the chemical potential (µc) of the graphene. Additionally, we validate the sensor's functionality through an equivalent circuit model. Moreover, the proposed sensor demonstrates outstanding performance metrics, including a high sensitivity (S) of 1.7 THz/RIU, a Figure of Merit (FOM) of 165.09 RIU -1 , highquality factor (Q) of 112.5. Despite its reduced structural thickness of 3 µm, it remains suitable for integration into nanotechnology devices. Furthermore, the absorber exhibits exceptional absorption properties even at steep incidence angles, expanding its applicability in diverse scenarios. Its potential to detect a wide range of viruses, including malaria, dengue, herpes simplex virus, influenza, and HIV, and distinguish various cancerous cells, holds promise for advancing biosensing applications.INDEX TERMS Metamaterial, graphene, sensitivity, figure of merit, quality factor.

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Graphene-infused multi-port circularly polarized dielectric resonator antenna with polarization switching

Upender

2024

Opt Quant Electron

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Implementing reconfigurable circularly polarized two port MIMO DRA for THz applications

Cited by 5 publications

References 45 publications

VO₂-Graphene Ultrathin Films: Enabling Wideband Switchable and Tunable THz Absorption

VO₂-Graphene Ultrathin Films: Enabling Wideband Switchable and Tunable THz Absorption

A Compact Metamaterial Biosensor for Multi-Virus Detection With Tunability and High Incidence Angle Absorption

Graphene-infused multi-port circularly polarized dielectric resonator antenna with polarization switching

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Implementing reconfigurable circularly polarized two port MIMO DRA for THz applications

Cited by 5 publications

References 45 publications

VO2-Graphene Ultrathin Films: Enabling Wideband Switchable and Tunable THz Absorption

VO2-Graphene Ultrathin Films: Enabling Wideband Switchable and Tunable THz Absorption

A Compact Metamaterial Biosensor for Multi-Virus Detection With Tunability and High Incidence Angle Absorption

Graphene-infused multi-port circularly polarized dielectric resonator antenna with polarization switching

Contact Info

Product

Resources

About

VO₂-Graphene Ultrathin Films: Enabling Wideband Switchable and Tunable THz Absorption

VO₂-Graphene Ultrathin Films: Enabling Wideband Switchable and Tunable THz Absorption