Results 71 to 80 of about 14,244,062 (276)
A Quadtree Beam-Segmenting Based Wide-Swath SAR Polar Format Algorithm
IEEE Access, 2020 The Polar Format Algorithm (PFA) is the most suitable imaging algorithm for high-resolution and highly-squinted spotlight Synthetic Aperture Radar (SAR), but the approximation of planar wavefront in this algorithm limits the effective scene size of PFA ...
Xin Nie, Long Zhuang, Shijian Shen
doaj +1 more source
Parameter inversion algorithm of CSAR moving target based on PFA sub‐aperture images
The Journal of Engineering, 2019 Circular SAR (CSAR) as a new kind of SAR imaging mode has the advantage of long‐time observation. For the moving target, the corresponding parameters of the moving target can be calculated by using the position information from the apparent coordinates of the moving target in these CSAR sub‐aperture images.
Di Yao, Zhou Wang, Wengu Yang, Feng Li
openaire +2 more sources
Wood‐Derived Nanocellulose‐Biocarbon Fresnel‐Zone Plate Lenses for Sub‐THz Frequency Applications
Advanced Materials Technologies, EarlyView.Wood‐derived nanocellulose and lignin‐based biocarbon were combined to fabricate fully bio‐based Fresnel zone plate (FZP) lenses for sub‐terahertz frequencies. These sustainable FZP lenses exhibit low dielectric loss and high directivity, achieving performance comparable to that of metallic references, and remain functional under environmental stress ...
Riikka Haataja +9 more
wiley +1 more source
Sensors, 2018 This paper proposes a new interferometric near-field 3-D imaging approach based on multi-channel joint sparse reconstruction to solve the problems of conventional methods, i.e., the irrespective correlation of different channels in single-channel ...
Yang Fang +5 more
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Advanced Materials Technologies, EarlyView.A closed U‐shaped microfluidic platform symmetrically embeds a single, size‐controlled HT29 colorectal cancer spheroid within a GFP‐HUVEC‐laden fibrin matrix. HT29 spheroids are associated with hyper‐branched endothelial network remodeling, while vascularized co‐culture is accompanied by anisotropic protrusive growth and EMT‐like marker changes in the ...
G. Cretti +4 more
wiley +1 more source
CMOS image sensor for multi-aperture optics
, 2022 106107This paper presents a 19x9=135 array sensor for wafer level multi-aperture micro optics intended for low z-height (
Schweiger, Thomas, Neubauer, Harald
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Liquid‐Crystal‐Based Reconfigurable Intelligent Surface for 7 GHz Mobile Communication
Advanced Materials Technologies, EarlyView.The glass‐based liquid‐crystal reconfigurable intelligent surface (LC‐RIS) integrates active‐matrix driving and blind‐greedy phase optimization within a 5G‐NR OFDM framework. This enables continuously tunable and autonomous enhancement of wireless coverage. Leveraging the transparency and manufacturability of liquid crystal panels, it is ideally suited
Tien‐Lun Ting +5 more
wiley +1 more source
Remote SensingAzimuth multi-channel techniques show great promise in high-resolution, wide-swath synthetic aperture radar systems. However, in practical engineering applications, errors between channels can significantly affect the reconstruction of multi-channel echo
Wensen Yang +6 more
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Sub-Aperture Interferometers [PDF]
, 2010 Sub-aperture interferometers -- also called wavefront-split interferometers -- have been developed for simultaneously measuring displacements of multiple targets.
Zhao, Feng
core
Image plane coded aperture for terahertz imaging
, 2012 In the absence of detector arrays, a single pixel coupled with an image plane coded aperture has been shown to be a practical solution to imaging problems in the terahertz and sub-millimeter wave domains. The authors demonstrate two laboratory, real-time,
Jacobs, Eddie L. +2 more
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