Results 11 to 20 of about 630 (181)

Janus Nanostructures Enabled by Confined Interfacial Engineering for Enhanced Electromagnetic Response. [PDF]

Adv Sci (Weinh)
Confined diffusion‐driven interfacial engineering enables the nanoscale construction of asymmetric SiC@C Janus hollow nanoshells, achieving synergistic impedance matching and electromagnetic energy dissipation for highly efficient broadband microwave absorption at ultralow filler loading.
Song L, Song C, Hu F, Chen Y, Wang L, Wang H, Guan L, Chen D, Yu K, Huang Y, Jia S, Xu X, Gao Q, Zhang D, Wang H, Xie H, Zhang R, Fan B.   +17 more
europepmc   +2 more sources

Dimensional Engineering of Carbon-Based Hybrids: From 1D Conductive Networks to 3D Porous Architectures for Next-Generation Microwave Absorption. [PDF]

Adv Sci (Weinh)
This review explores dimensional architecture engineering to overcome the impedance‐attenuation trade‐off in electromagnetic wave absorbing materials. By analyzing 1D to 3D structures and their multidimensional hybrids, we highlight synergistic mechanisms for enhanced performance.
Liu C, Guo X, Zhang X, Sun R, Zhang X, Ge C, Yang X, Liu Y.   +7 more
europepmc   +2 more sources

Miniaturisation of high-frequency SURFACE wave radar transmitting antenna

The Journal of Engineering, 2019
Antennas operating in the high-frequency (HF) bands are generally relatively large in size, which severely limits the application of the antennas. Therefore, miniaturisation of the antenna is necessary.
Hong-Bo Li, Yang Song, Chang-Jun Yu
doaj   +1 more source

Sea Storm Analysis: Evaluation of Multiannual Wave Parameters Retrieved from HF Radar and Wave Model

Remote Sensing, 2022
Intense atmospheric disturbances, which impact directly on the sea surface causing a significant increase in wave height and sometimes strong storm surges, have become increasingly frequent in recent years in the Mediterranean Sea, producing extreme ...
Simona Saviano, Anastasia Angela Biancardi, Marco Uttieri, Enrico Zambianchi, Luis Alberto Cusati, Andrea Pedroncini, Giorgio Contento, Daniela Cianelli   +7 more
doaj   +1 more source

High-frequency ocean radar support for Tsunami Early Warning Systems

Geoscience Letters, 2018
A high-frequency (HF) ocean radar system is a shore-based remote sensing system to simultaneously monitor ocean surface currents, waves and wind far beyond the horizon.
Anna Dzvonkovskaya, Leif Petersen, Thomas Helzel, Matthias Kniephoff   +3 more
doaj   +1 more source

Remote Observation of a Small Meteotsunami in the Bight of Benin Using HF Radar Operating in Lower HF Band

IEEE Access, 2019
High-frequency (HF) surface-wave (SW) radar systems have demonstrated their capability to capture the signals from seismic and non-seismic tsunami events using the estimation of surface current changes. Several ocean radar systems, operating in the upper
Anna Dzvonkovskaya, Dejan Nikolic, Vladimir Orlic, Miroslav V. Peric, Nikola Tosic   +4 more
doaj   +1 more source

Measurement Characteristics of Near-Surface Currents from Ultra-Thin Drifters, Drogued Drifters, and HF Radar

Remote Sensing, 2018
Concurrent measurements by satellite tracked drifters of different hull and drogue configurations and coastal high-frequency radar reveal substantial differences in estimates of the near-surface velocity.
Steven L. Morey, Nicolas Wienders, Dmitry S. Dukhovskoy, Mark A. Bourassa   +3 more
doaj   +1 more source

Comparison of Measured Surface Currents from High Frequency (HF) and X-Band Radar in a Marine Protected Coastal Area of the Ligurian Sea: Toward an Integrated Monitoring System

Remote Sensing, 2020
Two different ground-based remote sensing instruments can be used for the near-real-time monitoring of surface waves and currents, namely the high frequency HF radar and the microwave X-band radar. The HF system reaches larger offshore distances at lower
Lyuba Novi, Francesco Raffa, Francesco Serafino   +2 more
doaj   +1 more source

Inversion of HF Radar Doppler Spectra Using a Neural Network

Journal of Marine Science and Engineering, 2019
For a number of decades, coastal HF radar has been used to remotely measure ocean surface parameters, including waves, at distances exceeding 100 km. The information, which has value in many ocean engineering applications, is obtained using the HF radar ...
Rachael L. Hardman, Lucy R. Wyatt
doaj   +1 more source

Wind Direction Inversion from Narrow-Beam HF Radar Backscatter Signals in Low and High Wind Conditions at Different Radar Frequencies

Remote Sensing, 2018
Land-based, high-frequency (HF) surface wave radar has the unique capability of monitoring coastal surface parameters, such as current, waves, and wind, up to 200 km off the coast.
Wei Shen, Klaus-Werner Gurgel
doaj   +1 more source