Results 51 to 60 of about 1,046 (220)
Bistatic and Stereoscopic Configurations for HF Radar
Remote Sensing, 2020 Most HF radars operate in a monostatic or quasi-monostatic configuration. The collocation of transmit and receive facilities simplifies testing and maintenance, reduces demands on communications networks, and enables the use of established and relatively
Stuart Anderson
doaj +1 more source
Cyclic Olefin Copolymers as Versatile Materials for Advanced Engineering Applications
Advanced Functional Materials, Volume 36, Issue 47, 11 June 2026.Cyclic olefin copolymers (COCs) are presented as highly versatile materials combining tunable synthesis, excellent optical properties, and mechanical robustness. Their potential spans microfluidics, bioengineering, and advanced electronics, while emerging self‐healing and sustainable solutions highlight future opportunities.
Giulia Fredi +3 more
wiley +1 more source
The Journal of Engineering, 2019 Radars operating in the high-frequency (HF) band can exploit propagation modes other than line-of-sight and are hence widely employed to provide over-the-horizon surveillance and remote sensing.
Stuart Anderson
doaj +1 more source
Remote Sensing, 2023 The amplitude and phase errors in array elements lead to uncertainties in the estimation of arrival angles (DOA), which, in turn, affect the accuracy of current measurements for high-frequency surface wave radar (HFSWR). To address this issue, this paper
Wei Fu +5 more
doaj +1 more source
Metamaterial Antennas Enhance MRI of the Eye and Occipital Brain
Advanced Materials, Volume 38, Issue 32, 8 June 2026.A radiofrequency antenna platform comprising planar and bend configurations is developed, incorporating structurally integrated epsilon‐negative metamaterial unit cells to enhance MRI. These antennas enable high‐resolution in vivo human MRI of the eye, orbit, and occipital brain. Comprehensive validation, including simulations, phantom experiments, SAR,
Nandita Saha +14 more
wiley +1 more source
Sea Surface Wind Correction Using HF Ocean Radar and Its Impact on Coastal Wave Prediction
, 2017 Both wind speeds and wind directions are important for predicting wave heights near complex coastal areas, such as small islands, because the fetch is sensitive to the wind direction.
Yukiharu Hisaki
core +1 more source
2D Materials Empowered Radar Absorbing Materials: A Review
Advanced Electronic Materials, Volume 12, Issue 12, 22 June 2026.Recent progress in 2D materials empowered radar absorbing materials (RAMs) is reviewed, highlighting four key structural design strategies that enhance electromagnetic wave absorption. Porous structures, heterogeneous interfaces, printed metamaterials, and tunable metasurfaces are compared in terms of their governing physics, fabrication complexity ...
Yujie Zhong +4 more
wiley +1 more source
Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 3, June 2026.Abstract Sea surface height (SSH) reflects a superposition of balanced motions (BM) and unbalanced motions (UBM), which play distinct roles in ocean dynamics and energetics. The Surface Water and Ocean Topography (SWOT) satellite provides two‐dimensional SSH maps at spatial resolutions where BM and UBM coexist, but its 21‐day repeat cycle precludes ...
Yue Wang +5 more
wiley +1 more source
Wave height and wind direction from the HF coastal ocean surface radar
, 2002 The biggest difficulty in extracting wind direction from high-frequency (HF) backscatter ground-wave radar data is in not knowing the fundamental shape of the directional spreading function at the Bragg wavelength for the sea-surface gravity waves.
Prytz, Arnstein +3 more
core +1 more source
Extensions to the COSRAD HF ocean surface radar : extraction of swell wave parameters [PDF]
, 2005 Routine extraction of ocean surface information from HF radar spectra has, to this point, been predominantly limited to surface currents and wind parameters which rely on the analysis of the first-order spectral lines.
Bathgate, Jonathan Stacy
core +1 more source