Results 81 to 90 of about 3,368,646 (281)
Fundamental aspects of netted radar performance [PDF]
, 2010 Netted radar employs several spatially distributed transmitters and receivers for information retrieval. This system topology offers many advantages over traditional monostatic and bistatic systems which use a single transmitter and a single receiver ...
Teng, Y.
core
Surface‐Spin‐Induced Magnetic Loss Enhancement in Ultralight Electromagnetic Absorbers
Advanced Science, EarlyView.Fe3O4 nanoparticles with different hollow rates were synthesized to demonstrate the key role of surface moment in magnetic loss process. Using the same volume filling ratio, the 54.1% hollow Fe3O4 absorber represents about 20% enhancement in the imaginary part (μ'') than solid particles due to the coexisting magnetic resonance of inside and outside ...
Ruimin Ren +5 more
wiley +1 more source
MicromachinesWe propose a linear polarization rotator metasurface composed of a grounded array of L-shaped corner-embraced patches. Both simulation and experimental results confirm that the metasurface achieves a polarization conversion ratio exceeding 90% across ...
Shi Kong +3 more
doaj +1 more source
Kresling Origami‐Based Metamaterial Robot for Dynamic Electromagnetic Control
Advanced Science, EarlyView.A reconfigurable metamaterial system integrates deformable origami units with high‐permittivity ceramic plates. Pneumatic switching between structural states alters local resonance conditions, enabling dynamic radar stealth and adaptive microwave reflection for mobile communication.
Xinxi Zeng +13 more
wiley +1 more source
Forked-Crossing Metasurface for Multi-Band Polarization Conversion with Distinct Bandwidths
MicromachinesThis study presents a reflective and highly efficient multi-band metasurface polarization converter based on a forked-crossing patch array. Both simulation and experimental results reveal that such a metasurface achieves polarization conversion ratio ...
Pengpeng Zhang +3 more
doaj +1 more source
Concept Design of a Near-Space Radar for Maritime Surveillance and Near-Field Tsunami Early-Warning [PDF]
, 2008 Off-shore detection of Tsunami waves is a critical component of an effective Tsunami early warning system (TEWS). Even more critical is the off-shore detection of local Tsunamis, namely Tsunamis that strike coastal areas within minutes from the ...
Galletti, Michele +2 more
core
Advanced Science, EarlyView.This study reports lightweight, elastic ceramic fabrics with broadband electromagnetic absorption (EAB = 9.8 GHz) and high‐temperature thermal insulation, enabled by precise microstructural control during ultrafast high‐temperature sintering (UHS), which induces the precipitation of defect‐rich t‐ZrO2 nanograins and turbostratic C nanoclusters.
Jiahao Yang +9 more
wiley +1 more source
IEEE Open Journal of Antennas and PropagationAttaining highly directive and integrated emissions in an antenna while simultaneously ensuring a slim profile is a challenging task. Here, we propose a novel strategy to design high gain microstrip array with dual functions, which combines the ...
Xianjiang Zhong +5 more
doaj +1 more source
Radar Detection-Inspired Signal Retrieval from the Short-Time Fourier Transform. [PDF]
Sensors (Basel), 2022 Abratkiewicz K.
europepmc +1 more source
Efficient Adsorption‐Based Direct Air Capture Via Triply Periodic Minimal Surface Architectures
Advanced Science, EarlyView.Architected triply periodic minimal surface (TPMS) contactors reshape direct air capture by replacing straight‐channel diffusion limits with convection‐enhanced CO2 transport. Chaotic advection thins boundary layers and exposes fast adsorption sites, enabling 70%–75% more fast sites, 114% higher productivity, and 51.8% lower energy consumption than ...
Qingyang Shao +6 more
wiley +1 more source