Results 1 to 10 of about 274 (89)

Radar Micro‐Doppler Signature Generation Based on Time‐Domain Digital Coding Metasurface [PDF]

Advanced Science
Micro‐Doppler effect is a vital feature of a target that reflects its oscillatory motions apart from bulk motion and provides an important evidence for target recognition with radars.
Si Ran Wang, Jun Yan Dai, Jun Chen Ke, Zhan Ye Chen, Qun Yan Zhou, Zhen Jie Qi, Ying Juan Lu, Yan Huang, Meng Ke Sun, Qiang Cheng, Tie Jun Cui   +10 more
doaj   +3 more sources

Random Time‐Space Coding Metasurfaces for Spatial Control of the Temporal Statistics of Electromagnetic Fields [PDF]

Advanced Science
Conventional methods to control electromagnetic (EM) fields via digital coding metasurfaces are basically focused on generating deterministic EM responses, such as beam forming, holographic imaging, and harmonic modulation, by employing specific coding ...
Jia Cheng Li, Jiang Han Bao, Che Liu, Tie Jun Cui   +3 more
doaj   +3 more sources

Convolution operations on time-domain digital coding metasurface for beam manipulations of harmonics

Nanophotonics, 2020
Time-domain digital coding metasurfaces have been proposed recently to achieve efficient frequency conversion and harmonic control simultaneously; they show considerable potential for a broad range of electromagnetic applications such as wireless ...
Zhang Cheng, Yang Jin, Yang Liu Xi, Ke Jun Chen, Chen Ming Zheng, Cao Wen Kang, Chen Mao, Wu Zhan Hao, Chen Jian Feng, Cheng Qiang, Cui Tie Jun   +10 more
doaj   +2 more sources

Hierarchical Reconfigurable Metasurface Based on Scenario-Guided Functional Modules and Programmable Core. [PDF]

Adv Sci (Weinh)
This paper proposes a hierarchical reconfigurable metasurface architecture (HRMA) to achieve comprehensive electromagnetic parameter modulation and on‐demand polymorphic function switching. The reconfigurable metasurface is divided into a programmable core (PC) and scenario‐guided functional modules (FMs), exhibiting significant flexibility and ...
Zhu L, Han J, Zheng Z, Feng Q, Xia D, Ma X, Mu Y, Luo G, Li R, Liu H, Xue H, Li L.   +11 more
europepmc   +2 more sources

Accurate and broadband manipulations of harmonic amplitudes and phases to reach 256 QAM millimeter-wave wireless communications by time-domain digital coding metasurface. [PDF]

Natl Sci Rev, 2022
Chen MZ, Tang W, Dai JY, Ke JC, Zhang L, Zhang C, Yang J, Li L, Cheng Q, Jin S, Cui TJ.   +10 more
europepmc   +2 more sources

Programmable time-domain digital-coding metasurface for non-linear harmonic manipulation and new wireless communication systems. [PDF]

Natl Sci Rev, 2019
Zhao J, Yang X, Dai JY, Cheng Q, Li X, Qi NH, Ke JC, Bai GD, Liu S, Jin S, Alù A, Cui TJ.   +11 more
europepmc   +2 more sources

Digital Coding Metasurfaces: Toward Programmable and Smart Manipulations of Electromagnetic Functions

Leida xuebao, 2022
Digital coding metasurfaces are an important research branch of metamaterials and metasurfaces. The digital coding method replaces the equivalent medium theory to characterize metasurfaces, which not only simplifies the design process of metasurfaces but
Weixiang JIANG, Hanwei TIAN, Chao SONG, Xin’ge ZHANG   +3 more
doaj   +1 more source

Nonlinear Quasi-Bessel Beam Generation Based on the Time-domain Digital-Coding Metasurface

Leida xuebao, 2021
A quasi-Bessel beam is a type of nondiffracted beam commonly used in microwave and optical fields. Although numerous methods have been proposed for quasi-Bessel beam generation, they are valid only in linear systems, indicating that the generation of ...
Zuqi FANG, Qiang CHENG, Tiejun CUI
doaj   +1 more source

Multi-frequency amplitude-programmable metasurface for multi-channel electromagnetic controls

Nanophotonics, 2023
The digital and programmable metasurfaces, as opposed to conventional metasurfaces, offer a more sophisticated method of collaborating information and physics, showcasing several real-time controls to electromagnetic (EM) ways in succinct ways.
Wu Rui Yuan, He Shi, Wu Jun Wei, Bao Lei, Cui Tie Jun   +4 more
doaj   +1 more source

Fall Feature Simulation and Wi-Fi Sensing Dataset Construction Based on Time-domain Digital Coding Metasurface

Leida xuebao
With the widespread application of Wi-Fi sensing technology in intelligent health monitoring, constructing high-quality perception datasets has become a key challenge. Particularly in monitoring abnormal behaviors, such as falls, traditional methods rely
Shaonan CHEN, Jiaming GU, Chao XU, Yimiao SUN, Siran WANG, Zhanye CHEN, Shuo LIU, Huidong LI, Junyan DAI, Yuan HE, Qiang CHENG   +10 more
doaj   +1 more source