Results 31 to 40 of about 7,981,538 (380)
STEERABLE TOROIDAL BIFOCAL LENS-ARRAY ANTENNA IN 57–64 GHZ RANGE
Известия высших учебных заведений России: Радиоэлектроника, 2019 Introduction. Currently, one of the most promising approaches to the development of 5th generation mobile wireless systems is the deployment of heterogeneous networks based on existing LTE cellular systems having both large and small cells.
Alexander A. Maltsev +3 more
doaj +1 more source
Development of concept of near-field technology in designing effective small-aperture microwave antennas [PDF]
Радиофизика и электроника, 2019 Subject and purpose. This article is devoted to the review of the original works of the authors on studying the effective small-sized individual radiators of various types using near-field technology. Methods and methodology.
I. Ivanchenko +5 more
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Adjusting Radiation Pattern of Small Antennas [PDF]
2020 International Workshop on Antenna Technology (iWAT), 2020 The antenna clusters have been used to control the impedance properties of the antenna, but they have potential also in radiation pattern reconfigurability. We demonstrate the benefits of multi-feed antennas using a mobile antenna as an example.
Luomaniemi, Rasmus +3 more
openaire +3 more sources
Efficient Beamforming and Radiation Pattern Control Using Stacked Intelligent Metasurfaces
IEEE Open Journal of the Communications SocietyIn this paper, we consider a stacked intelligent metasurface (SIM) with the ability to perform beamforming in the electromagnetic (EM) wave domain. We develop a path-loss model that allows us to compute the received power of the signal after passing ...
N. Hassan +4 more
semanticscholar +1 more source
Brain and SpineIntroduction: Cervical central spinal stenosis (CCSS) is a leading cause of adult spinal cord dysfunction. Magnetic resonance imaging (MRI) is the reference standard, but reporting is time-consuming and subject to inter-observer variability.
Vasileios Mougios +8 more
doaj +1 more source
Impact of 3D UWB Antenna Radiation Pattern on Air-to-Ground Drone Connectivity [PDF]
IEEE Vehicular Technology Conference, 2018 Three dimensional (3D) radiation pattern of an antenna mounted at a drone can significantly influence the air-to-ground (A2G) link quality. Even when a drone transmitter is very close to a ground receiver, if the antenna orientations are not aligned ...
Jianlin Chen +4 more
semanticscholar +1 more source
Analyze UCA Based OAM Communication From Spatial Correlation
IEEE Access, 2020 Orbital Angular Momentum(OAM) of Electromagnetic(EM) wave can be seen as a new degree of freedom(DoF) for wireless communication besides time and frequency. Uniform Circular Antenna Array(UCA) fed with signal of equal amplitude and equal phase difference
Wei Yu +3 more
doaj +1 more source
Remote Sensing, 2023 This article discusses the methods and results of assessing the angular resolution and sounding depth of enhanced-power ground penetration radars obtained during archaeological and geographical expeditionary works in various natural areas.
Pavel Morozov +4 more
doaj +1 more source
Comprehensive Analysis of Xiaomi Mi 8 GNSS Antenna Performance
SensorsThe interest in precise point positioning techniques using smartphones increased with the launch of the world’s first dual-frequency L1/L5 GNSS smartphone, Xiaomi Mi 8.
Mónica Zabala Haro +3 more
doaj +1 more source
Radiation from elementary sources in a uniaxial wire medium
, 2012 We investigate the radiation properties of two types of elementary sources embedded in a uniaxial wire medium: a short dipole parallel to the wires and a lumped voltage source connected across a gap in a generic metallic wire. It is demonstrated that the
J. Brown +6 more
core +1 more source