Results 61 to 70 of about 152,416 (209)
International Journal of Antennas and Propagation, 2014 Reflector antennas have been widely used in many areas. In the implementation of parabolic reflector antenna for broadcasting satellite applications, it is essential for the spacecraft antenna to provide precise contoured beam to effectively serve the ...
N. H. Abd Rahman +4 more
doaj +1 more source
Planar Super‐Oscillation Diffractive Lenses: Practical Developments and Applications
Nanophotonics, Volume 15, Issue 16, 26 August 2026.This review examines planar super‐oscillation diffractive lenses as a unified framework for super‐oscillatory lenses and supercritical lenses. It focuses on applications in super‐resolution imaging, micro/nanofabrication, and precision measurement and relates their application‐specific requirements to focal‐field control, multiobjective design ...
Yutian Cheng +6 more
wiley +1 more source
IEEE AccessThe requirements of low Earth orbit (LEO) satellite systems for high-precision and selective multiple coverage, have driven much interest and demand for millimeter-wave multibeam antennas.
Youngin Yoo +4 more
doaj +1 more source
Impact of an extreme storm event on a multiple intertidal barred coastal system
Earth Surface Processes and Landforms, Volume 51, Issue 8, August 2026.Extreme storms do not necessarily cause extreme coastal erosion. Integrated DGPS surveys and SWAN nearshore wave modelling reveal that Storm Barra's peak coincided with a low‐tide stage, allowing multiple intertidal bars (MITBs) to dissipate incoming wave energy before it reached Dundrum Bay's shoreline, highlighting the combined role of tidal stage ...
Melanie Biausque +4 more
wiley +1 more source
Multibeam Phased-Array Antennas Developed and Characterized [PDF]
, 2003 Fixed-formation microsatellites have been proposed for future NASA missions to lower costs and improve data collection and reliability. Achieving seamless connectivity communications between these satellites requires the use of multibeam array antennas ...
Lambert, Kevin M., Lee, Richard Q.
core
Remote Sensing in Ecology and Conservation, Volume 12, Issue 4, Page 513-530, August 2026.This research established a new object detection model based on YOLOv11 to recognise benthic organisms, specifically sea cucumbers, by utilising high‐resolution photogrammetric‐based orthomosaics acquired along infralittoral Mediterranean Sea beds. The model demonstrated impressive performance metrics and, when combined with the Deepness plugin for the
Gian Mario Sangiovanni +9 more
wiley +1 more source
Antenna with multibeam applications
Electronics Letters, 1973 The design of a dual-reflector antenna that focuses an inclined incident plane wave to a point away from the axis of symmetry of the reflector is discussed. A useful application of such a system would be as a multibeam antenna for use in communication via satellites.
openaire +1 more source
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 8, August 2026.Abstract Only one quarter of the global ocean floor has been directly surveyed; the remaining three quarters are inferred from satellite altimeter‐derived gravity data using techniques developed in the 1990s. These classical methods correlate gravity anomalies with known depths and extrapolate bathymetry in unsounded regions.
David Sandwell +13 more
wiley +1 more source
, 2021 RLSA antennas normally have a single beam produced by slots installed on their radiating element. A technique was, therefore, introduced in this study to optimally design multibeam RLSA antennas.
Purnamirza, Teddy +3 more
core +1 more source
Adaptive Multichannel Terahertz Communication by Space-Time Shared Aperture Metasurfaces
IEEE Access, 2020 We propose a technique for adaptive multichannel communication in the low-terahertz frequency regime through simultaneous and independent multifrequency multibeam scanning via a single time-modulated metasurface consisting of graphene micro-patch ...
Hooman Barati Sedeh +2 more
doaj +1 more source