Tunable Cross-Coupled metallic elements loaded epsilon negative and Near-Zero index characteristics based metamaterial

In this paper, design and fabrication of a dual-band near-zero index metamaterial (MTM) structure using copper on an epoxy resin fiber (FR-4) dielectric substrate is reported for refractive index sensing applications. The primary objective is to achieve dual-band operation spanning a 1–15 GHz frequency range, with a specific focus on achieving a broad bandwidth in the C-band. The resonance of the MTM structure was ascribed to the coupling of plane electromagnetic waves with surface plasmon polaritons on the structure, resulting in a quadrupole plasmon resonance mode. Furthermore, transmission characteristics of the fabricated MTM structure were experimentally measured and found to align closely with the simulated results obtained through the finite element method in COMSOL Multiphysics. The designed MTM structure demonstrates negative and near-zero permittivity at resonance frequencies, enabling left-handed and near-zero index behavior in dual microwave frequency bands. Under room temperature conditions, the MTM sensor exhibited sensitivities of 1 GHz/RIU and 3 GHz/RIU at resonance frequencies of 2.7 and 7.3 GHz, respectively. Consequently, the MTM structure exhibits significant potential for diverse applications, serving as a valuable component in sensors, detectors, and optoelectronic devices operating in the GHz region.

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A creative hybridization of metamaterial CSRR and multiple-mode resonators for designing a compact wideband bandpass filter for 5G/IOT/WLAN/Wi-Fi 6E applications

Elbathaoui,

Jebbor,

Das

et al. 2024

Phys. Scr.

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This article presents the design of a metamaterials-based hybrid wideband bandpass filter (WB-BPF) supporting several advanced communication applications. The suggested filter uses multiple-mode resonators (MMRs) and metamaterial complementary split-ring resonators (CSRRs). Coupling frequencies are optimized by stretching the coupled lines parallel on both sides. At the same time, the metamaterial complementary split-ring resonator (CSSR) cells are carefully tuned to improve impedance matching, reduce insertion loss, and broaden the bandwidth. The designed compact-sized bandpass filter offers a Quality factor (Q_L) of above 1 while maintaining a wide bandwidth of 6150 MHz. The realized structure requires a small physical area of 20.2×10 mm2. A parametric study, field distribution analysis, and equivalent circuit model of the proposed hybrid BPF are performed. The resulting filter has an exceptional response with five transmission poles, demonstrating superior performance in the targeted frequency range. This wideband bandpass filter, operating from 3.3 GHz to 9.45 GHz, finds potential applications in the emerging fields of the Internet of Things (IoT), wireless fidelity 6 enhanced (Wi-Fi 6E), and high-speed wireless communications, particularly 5G technology, and 5 GHz wireless local area network (WLAN). This research demonstrates significant advances in the development of bandpass filters, offering compact, high-performance solutions for modern communications systems.

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Tunable Cross-Coupled metallic elements loaded epsilon negative and Near-Zero index characteristics based metamaterial

Cited by 3 publications

References 24 publications

Design, fabrication, and characterization of epsilon negative and near-zero index metasurface

Design, fabrication, and characterization of epsilon negative and near-zero index metasurface

Quadrupole mode plasmon resonance enabled dual-band metamaterial for refractive index sensing application

A creative hybridization of metamaterial CSRR and multiple-mode resonators for designing a compact wideband bandpass filter for 5G/IOT/WLAN/Wi-Fi 6E applications

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