Results 1 to 10 of about 4,688 (67)

Dual-Polarized Multi-Beam Fixed-Frequency Beam Scanning Leaky-Wave Antenna

open access: yesSensors, 2023
A fixed-frequency beam-scanning leaky-wave antenna (LWA) array with three switchable dual-polarized beams is proposed and experimentally demonstrated. The proposed LWA array consists of three groups of spoof surface plasmon polaritons (SPPs) LWAs with ...
Yong Jin Zhou, Dapeng Chu
exaly   +3 more sources

Design of a Tile-Type Rx Multi-Beam Digital Active Phased Array Antenna System [PDF]

open access: yesJournal of Electromagnetic Engineering and Science, 2022
This paper details the design, manufacture, and performance test results of a highly integrated Rx multi-beam active phased array antenna for aerial communications.
Taehwan Joo   +4 more
doaj   +1 more source

Multi-Beam Radar Communication Integrated System Design

open access: yesInformation, 2023
In this paper, we propose a multi-beam integrated radar and communication scheme using phased-array antenna, in which the same LFM-BPSK integrated waveform is used for both the radar and the communication beams.
Hao Ma, Jun Wang, Xin Sun, Wenxin Jin
doaj   +1 more source

A Broadband Multi-Beam Dual-Circularly Polarized Reflect-Array for Ka-Band Application

open access: yesIEEE Access, 2023
In this paper, we proposed a multi-beam dual-circularly polarized (dual-CP) reflect-array (RA) antenna for Ka-band application. Two reflection beams fed by the right-handed (RH) CP horn point to $\theta _{\mathrm {R}}=3.5^{\circ }$ and $\theta _ ...
Yu Hui Zhang   +4 more
doaj   +1 more source

The Use of Surface Topography for the Identification of Discontinuous Displacements Due to Cracks

open access: yesMetals, 2020
The determination of three components of displacements at material surfaces is possible using surface topography information of undeformed (reference) and deformed states.
Fatih Uzun, Alexander M. Korsunsky
doaj   +1 more source

Multi-field-sensing metasurface with robust self-adaptive reconfigurability

open access: yesNanophotonics, 2023
The continuous increase in communication capacity is accompanied by an increase in transmission frequency, which creates new demands on the transmission efficiency in modern.
Zhu Ruichao   +11 more
doaj   +1 more source

Global Energy Efficiency Optimization of a Ka-Band Multi-Beam LEO Satellite Communication System

open access: yesIEEE Access, 2021
We investigate the issue of global energy efficiency optimization in a multi-beam low Earth orbit (LEO) satellite communication system. Current terrestrial networks provide high-quality and low cost communication mainly in densely populated areas ...
Qingbi Liao, Megumi Kaneko
doaj   +1 more source

A N260 Band 64 Channel Millimeter Wave Full-Digital Multi-Beam Array for 5G Massive MIMO Applications

open access: yesIEEE Access, 2020
In this paper, a 37-42.5GHz (N260 Band) 64 channel full-digital multi-beam array for 5G massive multiple input multiple output (MIMO) applications is developed.
Le Kuai   +7 more
doaj   +1 more source

Atlas of Shipwrecks in Inner Ionian Sea (Greece): A Remote Sensing Approach

open access: yesHeritage, 2020
Underwater cultural heritage (UCH) sites constitute an important part of the overall cultural heritage both nationally and globally as they carry cultural, environmental, scientific, technological, political, economic and social viewpoints.
Maria Geraga   +13 more
doaj   +1 more source

Design and Demonstration of a Novel Long-Range Photon-Counting 3D Imaging LiDAR with 32 × 32 Transceivers

open access: yesRemote Sensing, 2022
Geiger-mode single-photon LiDAR is an important tool for long-distance three-dimensional remote sensing. A planar-array-based photon counting LiDAR that uses 32-by-32 fiber arrays coupled to an optical lens as a transceiver unit was developed.
Changsheng Tan   +6 more
doaj   +1 more source

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