Optics Communications, Год журнала: 2024, Номер unknown, С. 131339 - 131339
Опубликована: Ноя. 1, 2024
Materials & Design, Год журнала: 2025, Номер unknown, С. 113903 - 113903
Опубликована: Март 1, 2025
Язык: Английский
Процитировано
1
Fundamental Research, Год журнала: 2024, Номер 5(2), С. 556 - 570
Опубликована: Ноя. 12, 2024
Due to the exponentially growing global mobile data of wireless communications evolving from 5 G 6 in recent years, research activities leveraging terahertz (THz) waves obtain larger channel capacities have shown an ever-increasing pace and reached unprecedented height than before. Historically, past few decades already witnessed much progress THz generation detection technologies, which been recognized for a long time as bottleneck preventing being tamed by human beings. However, importance developing advanced components such antennas, transmission lines, filters, power amplimers, etc., constitute basic building blocks system, should not be overlooked sake exploiting spectra future communications, sensing imaging applications. While producing scannable highly-directive antenna beam proves indispensable period microwaves, significance functionality is more critical era, considering that intractable challenges severity free-space propagation losses, susceptibility atmospheric environments, unavailability efficient signal sources. This article structured under this background, dedicated reviewing several enabling beam-scanning concepts, structures, architectures developed systems. Specifically, we divide these solutions into four groups based on different mechanisms, i.e., mechanical motion, phased array, frequency beam-scanning, reconfigurable metasurfaces.
Язык: Английский
Процитировано
6
Opto-Electronic Advances, Год журнала: 2024, Номер 7(9), С. 240040 - 240040
Опубликована: Янв. 1, 2024
Smart antennas have received great attention for their potentials to enable communication and perception functions at the same time. However, realizing function synthesis remains an open challenge, most existing system solutions are limited narrow operating bands high complexity cost. Here, we propose externally perceivable leaky-wave antenna (LWA) based on spoof surface plasmon polaritons (SSPPs), which can realize adaptive real-time switching between "radiating" "non-radiating" states beam tracking different frequencies. With assistance of computer vision, smart SSPP-LWA is able detect external target user or jammer, intelligently track by self-adjusting frequency. The proposed scheme helps reduce power consumption through dynamically controlling radiating state antenna, improve spectrum utilization avoid conflicts deciding On other hand, it also helpful physical layer security working according presence in real In addition, be generalized metamaterial systems could a candidate synaesthesia integration future systems.
Язык: Английский
Процитировано
4
Micromachines, Год журнала: 2024, Номер 15(8), С. 1014 - 1014
Опубликована: Авг. 7, 2024
Manipulating orthogonally polarized waves independently in a single metasurface is pivotal. However, controlling the phase shifts of difficult, especially same frequency bands. Here, we propose receiver-phase shift-transmitter transmitarray with independent control arbitrary polarization states bands, which transmission rates reach more than 90% bands 4.2~4.9 GHz and 5.3~5.5 GHz. By introducing phase-regulation structure to each element, phases covering 360° for different incident can be controlled by geometric parameters, two-bit coding obtained. The design principle based on two-port network's scattering matrix has been analyzed. To verify tuning abilities proposed incidences multifunctional receive-phase shift-radiation (RPRCT), composed 16×16 elements, functions anomalous refraction (for example, orbital angular momentum wave) focusing was simulated measured. measured results agree reasonably well ones. Our findings provide simple method obtaining orthogonal greatly improves capacity spectral efficiency communication channels.
Язык: Английский
Процитировано
3
Advanced Composites and Hybrid Materials, Год журнала: 2024, Номер 8(1)
Опубликована: Дек. 3, 2024
Язык: Английский
Процитировано
3
Advanced Materials Technologies, Год журнала: 2025, Номер unknown
Опубликована: Апрель 15, 2025
Abstract In this paper, we present a transparent and tunable radar‐infrared bi‐stealth metamaterial consisting of an infrared shielding layer (IRSL), radar‐absorbing (RAL), water substrate, metal meshed reflective backplane. The IRSL consists array indium tin oxide square patches, reducing emissivity transmitting microwaves. the RAL, ultrathin metallic meshes with different periods are integrated into one to broaden microwave absorption bandwidth. Moreover, substrate facilitates tunability performance via its fluidity. Experimental measurements simulations indicate that fabricated sample can achieve over 90% within wide frequency range 3.6–15.8 GHz relative bandwidth 126%. band be further switched 3.6–5.9 11.2–13.8 by simply adjusting thickness. addition, low ≈0.37 is achieved in atmospheric window (8–14 µm), while measured average optical transmittance reaches 65.5% at 400–800 nm. main advantage proposed compatibility across visible, infrared, regions simultaneous realization high transparency, reduced emissivity, broadband switchable absorption. Given these multiple functionalities superior performances, has great application potential aircraft windows, glass curtain walls buildings, counter‐surveillance devices, wireless communication systems.
Язык: Английский
Процитировано
0
Laser & Optoelectronics Progress, Год журнала: 2025, Номер 62(10), С. 1000001 - 1000001
Опубликована: Янв. 1, 2025
Процитировано
0
Advanced Functional Materials, Год журнала: 2025, Номер unknown
Опубликована: Июнь 1, 2025
Abstract The intelligent control of electromagnetic waves by 2D active period structures has become very common in recent years. However, the methods for ultra‐wideband designs are lacking to achieve much more adaptive and flexible manipulation frequency domain. Here we propose a new method realize independent reflection amplitude phase under using reflectarray. Each unit cell is composed tightly coupled antenna circuit accomplish receiving or transmitting spatial wave signal modulations amplitude‐phase information respectively. field‐circuit co‐simulation preferred analyze optimize texture. One prototype whole reflectarray fabricated corresponding measurement results with continuous 1‐bit switching have been actualized working frequencies from 0.6 1.6 GHz relative bandwidth 90.9%. Further, one multiple spectrums (Doppler shift) generated time‐modulation achieved ultra‐wideband. Both spectrum shifting can be applied mimic various scattering signals
Язык: Английский
Процитировано
0
Опубликована: Янв. 1, 2024
Язык: Английский
Процитировано
0
Laser & Optoelectronics Progress, Год журнала: 2024, Номер 61(19), С. 1913015 - 1913015
Опубликована: Янв. 1, 2024
Процитировано
0