Results 51 to 60 of about 328,962 (374)
Sensors, 2021 We have built a Fizeau fiber interferometer to investigate the internal cylindrical defects in an aluminum plate based on laser ultrasonic techniques. The ultrasound is excited in the plate by a Q-switched Nd:YAG laser. When the ultrasonic waves interact
Wen-Bei Liu +5 more
doaj +1 more source
Experimental study of on-body radio channel performance of a compact ultra wideband antenna [PDF]
, 2015 In this paper, on-body radio channel performance of a compact ultra wideband (UWB) antenna is investigated for body-centric wireless communications.
Abbasi, Qammer H. +3 more
core +1 more source
IEEE Access, 2020 This paper presents a metasurface-based single-layer low-profile circularly polarized (CP) antenna with the wideband operation and its multiple-input multiple-output (MIMO) configuration for fifth-generation (5G) communication systems.
Niamat Hussain +3 more
semanticscholar +1 more source
Gateway deployment algorithm based on 6LoWPAN multi-gateway system
Dianzi Jishu Yingyong, 2018 The addition of multi-gateway function and protocol in the Destination Oriented Directed Acyclic Graph (DODAG) network routing topology of 6LoWPAN is conducive to the improvement of the entire network capacity and the reduction of energy consumption and ...
He Aizhou, Zheng Lin, Qu Qiji
doaj +1 more source
, 2015 The focus of UWB antenna research activity has matured in recent years and currently mainly concentrates on applications such as biomedicine and security. Early UWB antenna designs were driven by the FCC allocation of spectrum in 2002 and focussed on obtaining wide impedance bandwidths with reasonable group delay characteristics.
Ammann, Max +2 more
openaire +3 more sources
Origami metamaterials for ultra-wideband and large-depth reflection modulation
Nature CommunicationsThe dynamic control of electromagnetic waves is a persistent pursuit in modern industrial development. The state-of-the-art dynamic devices suffer from limitations such as narrow bandwidth, limited modulation range, and expensive features.
Zicheng Song +11 more
semanticscholar +1 more source
Intelligent multicast routing method based on multi-agent deep reinforcement learning in SDWN
Mathematical Biosciences and Engineering, 2023 Multicast communication technology is widely applied in wireless environments with a high device density. Traditional wireless network architectures have difficulty flexibly obtaining and maintaining global network state information and cannot quickly ...
Hongwen Hu +4 more
doaj +1 more source
Switchable filtering in vivaldi antenna [PDF]
, 2010 Presented is a new frequency switchable Vivaldi antenna that has a capability to operate in a wideband mode (1-3 GHz) and reconfigure to six different subbands of operations.
Gardner, P. +3 more
core +1 more source
IEEE AccessMobile Edge Computing (MEC) is pivotal for supporting compute-intensive and latency-critical applications in forthcoming mobile networks. It plays an essential role in providing network services through Low Earth Orbit (LEO) satellites, especially in ...
Bo Wang, Jiecheng Xie, Dongyan Huang
doaj +1 more source
Applied Sciences, 2020 In this paper, we demonstrate an active switching of extremely high Q-factor Fano resonances using vanadium oxide (VO2)-implanted THz asymmetric double C-shaped metamaterial (MM) structures.
Jing Ma +4 more
doaj +1 more source