Results 11 to 20 of about 32,801 (229)

Dual-Beam Steerable TMAs Combining AM and PM Switched Time-Modulation

open access: yesSensors, 2022
Wireless sensor networks (WSN) are increasingly requiring directional antennas that not only provide higher capacity, security, transmission range or robustness against interference, but also contribute with smart antenna capabilities such as adaptive ...
Roberto Maneiro-Catoira   +3 more
doaj   +1 more source

A Storage-Saving Quadtree-Based Multibeam Bathymetry Map Representation Method

open access: yesJournal of Marine Science and Engineering, 2023
With the rapid advancement of the simultaneous localization and mapping (SLAM) technology, the collaboration of several autonomous underwater vehicles (AUVs) in large-scale seafloor imaging has become a trending topic. Electromagnetic waves are difficult
Zheng Cong   +9 more
doaj   +1 more source

Multi-Beam Scanning Electron Microscopy for High-Throughput Imaging in Connectomics Research

open access: yesFrontiers in Neuroanatomy, 2018
Major progress has been achieved in recent years in three-dimensional microscopy techniques. This applies to the life sciences in general, but specifically the neuroscientific field has been a main driver for developments regarding volume imaging.
Anna Lena Eberle, Dirk Zeidler
doaj   +1 more source

A 3D-Printed Subterahertz Metallic Surface-Wave Luneburg Lens Multibeam Antenna

open access: yesIEEE Transactions on Terahertz Science and Technology, 2023
This letter presents an experimental realization of a subterahertz metallic gradient index (GRIN) lens multibeam antenna operating at 355 GHz. The antenna is composed of a surface-wave Luneburg lens based on a bed of nails and a feeder array of nine WR-2.
Boyu Nie   +4 more
semanticscholar   +1 more source

On the sensitivity of the capacity enhancement of a TDMA system with adaptive multibeam antennas [PDF]

open access: yes, 1997
The paper presents results for the likely capacity improvement when an adaptive multibeam antenna is used in conjunction with air interface parameters akin to the DCS1800 system.
Swales, SC, Tsoulos, GV, Beach, MA
core   +1 more source

msemalign: a pipeline for serial section multibeam scanning electron microscopy volume alignment

open access: yesFrontiers in Neuroscience, 2023
Serial section multibeam scanning electron microscopy (ssmSEM) is currently among the fastest technologies available for acquiring 3D anatomical data spanning relatively large neural tissue volumes, on the order of 1 mm3 or larger, at a resolution ...
Paul V. Watkins   +2 more
doaj   +1 more source

Deep Learning-Based Joint Channel Prediction and Multibeam Precoding for LEO Satellite Internet of Things [PDF]

open access: yesIEEE Transactions on Wireless Communications
Low earth orbit (LEO) satellite internet of things (IoT) is a promising way achieving global Internet of Everything, and thus has been widely recognized as an important component of sixth-generation (6G) wireless networks. Yet, due to high-speed movement
Ming Ying   +3 more
semanticscholar   +1 more source

How Do Continuous High-Resolution Models of Patchy Seabed Habitats Enhance Classification Schemes?

open access: yesGeosciences, 2019
Predefined classification schemes and fixed geographic scales are often used to simplify and cost-effectively map the spatial complexity of nature.
Gustav Kågesten   +3 more
doaj   +1 more source

Stable Emissions from a Four-Rod Nd:YAG Solar Laser with ±0.5° Tracking Error Compensation Capacity

open access: yesPhotonics, 2023
Conventional solar-pumped lasers rely on expensive and highly accurate solar tracking systems, which present a significant economic barrier to both solar laser research and practical applications.
Miguel Catela   +7 more
doaj   +1 more source

Wideband and High-Efficiency Parallel-Plate Luneburg Lens Employing All-Metal Metamaterial for Multibeam Antenna Applications

open access: yesIEEE Transactions on Antennas and Propagation, 2023
A parallel-plate Luneburg lens (LL) based on all-metal metamaterial is presented in this article. To achieve the required refractive index distribution of the LL, an all-metal unit cell with a separated cuboid is proposed, whose height is related to its ...
Ji-Wei Lian   +4 more
semanticscholar   +1 more source

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