Conformal Radiation-type Programmable Metasurface for Agile Millimeter-Wave OAM Generation

Research, Год журнала: 2025, Номер 8

Опубликована: Янв. 1, 2025

Since the scarcity of bandwidth resources has become increasingly critical in modern communication systems, orbital angular momentum (OAM) with a higher degree freedom information modulation promising solution to alleviate shortage spectrum resources. Consequently, integration OAM millimeter-wave technology emerged as focal point next-generation research. Recently, programmable metasurfaces have gained considerable attention essential devices for generation due real-time tunability, but their profiles are relatively high result external feed source. This paper proposes conformal radiation-type metasurface operating band. By employing series–parallel hybrid network replace conventional sources, overall profile system can be reduced less than 0.1 λ . Furthermore, proposed innovation design could also achieve cross-shaped architecture, which is ultraportable and very effective integrating front ends satellites or aircraft eliminating issues such source blockage well energy spillover losses metasurfaces. The realized gain 22.54 dB an aperture efficiency 21.75%, thus generating high-purity waves topological charges l = 0, +1, +2, +3. Additionally, by incorporating beam scanning techniques, deflected accommodate scenarios moving receivers, demonstrating substantial potential future high-speed wireless applications.

Язык: Английский

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Design and Control of Rotating Varifocal Elliptical Airy Vortex Beams Using Composite Phase Metasurfaces

Optics Communications, Год журнала: 2025, Номер unknown, С. 131727 - 131727

Опубликована: Март 1, 2025

Язык: Английский

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Multifunctional Metamaterial with Reconfigurable Electromagnetic Scattering Properties for Advanced Stealth and Adaptive Applications

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Авг. 23, 2024

Abstract The rapid development of radar detection systems has led to an increased sensitivity the electromagnetic (EM) scattering properties detected targets. Flexible and adaptable EM significantly enhance survivability battlefield weapons. This paper presents design a novel multifunctional metamaterial with reconfigurable based on bistable curved beam. In addition cushioning energy absorption beams, achieves more than 90% in frequency range 2.17–17.31 GHz, relative thickness only 0.09 λ L . nature allows it switch between different states. Moreover, combined digital coding, this can continuously adjust absorbing bandwidth further rate within specific band range. If applied satellite configurations, developed reduces cross section offers potential applications reconfiguring properties, when configurations. By actively controller reconstructing at certain points, achieve camouflage, providing innovative solutions for future stealth technology, electronic countermeasures, deception jamming detection.

Язык: Английский

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Intelligent Transmissive Microwave Metasurface with Optical Sensing and Transparency

Research, Год журнала: 2024, Номер 7

Опубликована: Янв. 1, 2024

Transmissive metasurfaces are essentially conducive to stealth, absorbers, and communications. However, most of the current schemes only allow microwave transmit generally adopt multilayer structures or thick dielectric substrates improve electromagnetic performance, restricting optical transmission conformal application. In addition, still require metal wires external power suppliers for programmability. Here, we propose design an intelligent transmissive metasurface with sensing transparency, which provides both channels without redundant devices suppliers, 2 associated each other. The is realized by validly integrating photosensitive materials into meta-structures. As a demonstration, fabricate ultrathin optically transparent based on polyethylene terephthalate substrate photoresistors, whose thickness 0.125 mm. We further construct cross-wavelength links sample experimentally validate that transmissions vary light intensities under full-polarization large-angle incidences, this possesses high transparency. transparency has potential applications in optical–microwave hybrid stealth technology.

Язык: Английский

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A lattice-enhanced light-driven terahertz meta-device with decoupled resonant modulation

Journal of Materials Chemistry C, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

This paper demonstrates that the lattice modes can effectively enhance performance of modulators and complements theory enhancement effect, which is used to design an ultrafast modulator with decoupled resonant modulation.

Язык: Английский

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