Results 61 to 70 of about 1,999,725 (279)

Metasurface‐Enabled Helical Wavefront Fingerprint Metrology for Quantitative Retrieval of Liquid Optical Constants

Advanced Science, EarlyView.
A metasurface‐enabled helical wavefront fingerprint (MHWF) paradigm is proposed for quantitative and specific retrieval of a liquid medium's refractive index and extinction coefficient. The liquid's complex dielectric response governs the wavefront evolution of the metasurface‐generated focused vortex beam, forming a distinctive three‐dimensional ...
Yuting Zhou, Hongliang Li, Simeng Li, Feiyu Jiao, Yansong Du, Jin Tae Kim, Sang‐Shin Lee, Duk‐Yong Choi, Fei Ding, Xuechao Yu, Xun Guan   +10 more
wiley   +1 more source

Short-Range Millimeter-Wave Radar Perception in a Polar Environment [PDF]

, 1999
–Autonomous vehicle operations in Antarctica challenge robotic perception. Flying ice and snow, changing illumination due to low sun angles and lack of contrast degrade stereo and laser sensing.
Chheda, S, Foessel, A, Alex Foessel, Sachin Chheda, Apostolopoulos, D, Dimitrios Apostolopoulos   +5 more
core  

Millimeter-Wave Backscattering Measurements with Transmitarrays for Personal Radar Applications [PDF]

, 2015
Electronic ISBN: 978-1-4673-9526-7INSPEC Accession Number: 15805767International audienceThe concept of personal radar has recently emerged as an interesting solution for next 5G applications.
Dardari, Davide, ‡, Anna Guerra, Clemente, Antonio, GUERRA, ANNA, Francesco Guidi, Dussopt, Laurent,, Dussopt, Laurent, Davide Dardari, Laurent Dussopt, Guerra, Anna, ‡, DARDARI, DAVIDE, Raffaele D'Errico, d'Errico, Raffaele, Guidi, Francesco, ‡, Guerra, Anna,, Guidi, Francesco,, Guidi, Francesco, Antonio Clemente, Dussopt, Laurent, ‡, Dardari, Davide,   +19 more
core   +1 more source

Topology‐Enabled Finite‐Band Absorption Framework Based on a Bioinspired Nested Dual‐Loop Architecture

Advanced Science, EarlyView.
A nuclear‐pore‐inspired nested dual‐loop architecture redistributes electromagnetic energy through coupled transport, confinement, and dissipation pathways. Integrated with Co/Fe3O4 dual‐magnetic composites and topology optimization, the 11‐mm‐thick absorber delivers continuous 2–40 GHz attenuation, raises finite‐band structural utilization to 82%, and
Shaokang Liu, Weicheng Liao, Pinchen Luo, Mengchen Jin, Tangming Yan, Xing Zhao, Qingshan Wang   +6 more
wiley   +1 more source

A Waveform and Velocity Ambiguity Resolution Method for Corner Radar

Applied Sciences
Millimeter-wave radar is experiencing an increasing demand for higher resolution and elevation measurement, necessitating its evolution from 3D millimeter-wave radar systems to 4D millimeter-wave radar.
Yu Liu, Dan Zhang, Shuo Wang, Jiazai Liu
doaj   +1 more source

Research on a mmWave Beam-Prediction Algorithm with Situational Awareness Based on Deep Learning for Intelligent Transportation Systems

Applied Sciences, 2022
Simply speaking, automatic driving requires the calculation of a large amount of traffic data and, finally, the obtainment of the optimal driving route and speed.
Jia Liang, Kaiming Li, Qun Zhang, Zisen Qi   +3 more
doaj   +1 more source

From Magnetic Fibers to Paper Architectures: A Lightweight Strategy for Robust Low‐Frequency Microwave Absorption

Advanced Science, EarlyView.
A scalable process converts para‐aramid fibers into soft‐magnetic building blocks via micrometer‐thick Fe0.64Ni0.36 (Invar‐type) coatings. Assembled into paper, they form a hierarchical conductive network whose tunable permeability enables thin, lightweight microwave absorption in the low‐frequency (S‐band) regime.
You Wu, Yanlong Li, Haitong Sun, Tao Liu, Kehai Liu, Kaihui Liu, Zhaoxia Sun, Wenbo Ju   +7 more
wiley   +1 more source

Revealing the Underlying Mechanisms in Performance Enhancement of Shellular Lattice Electrodes During Anion Exchange Membrane Water Electrolysis Process

Advanced Science, EarlyView.
Micro laser powder bed fusion enables architected nickel shellular lattice gas diffusion layers for anion exchange membrane water electrolysis. Among regular open cell geometries, the Gyroid lattice promotes bubble release, convective reactant replenishment and continuous electron transport, delivering low overpotentials, enhanced charge transfer and ...
Tianxiao Niu, Rui Li, Xiao Chen, Deyong Sun, Tianyu Gao, Junhao Ding, Shuo Qu, Xu Song   +7 more
wiley   +1 more source

Millimeter-Wave Radars for Environmental Studies [PDF]

Telecommunications and Radio Engineering, 2004
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Vavriv, D.M., Volkov, V.A., Bormotov, V.N., Vynogradov, V.V., Kozhyn, R.V., Trush, B.V., Belikov, A.A., Semenyuta, V.Ye.   +7 more
openaire   +2 more sources

Sub-millimeter wave diode transceivers

, 2014
We present sub-millimeter wave transceiver modules intended for imaging radar applications. In particular a novel circuit architecture that operates in homodyne FMCW radar mode will be highlighted [1], and the trade-offs between performance and circuit ...
Tomas Bryllert, Bryllert, Tomas, Bryllert, Tomas,   +2 more
core   +1 more source