Results 101 to 110 of about 336,853 (296)

Deep Reinforcement Learning-Driven Hybrid Precoding for Efficient Mm-Wave Multi-User MIMO Systems

Journal of Sensor and Actuator Networks
High route loss and line-of-sight requirements are two of the fundamental challenges of millimeter-wave (mm-wave) communications that are mitigated by incorporating sensor technology.
Adeb Salh, Mohammed A. Alhartomi, Ghasan Ali Hussain, Chang Jing Jing, Nor Shahida M. Shah, Saeed Alzahrani, Ruwaybih Alsulami, Saad Alharbi, Ahmad Hakimi, Fares S. Almehmadi   +9 more
doaj   +1 more source

THICK FILM MM-WAVE ISOLATOR

Le Journal de Physique Colloques, 1988
Promising preliminary results are presented for an isolator in finline structure using hexaferrite thick film. The nonreciprocal properties of this structure were measured in the frequency range 44-50 GHz. The experimental results exhibited an isolation in excess of 30 dB between 47.7 and 49 GHz.
Živanov, Lj., Nikolić, P., Aleksić, O.   +2 more
openaire   +2 more sources

Copper Nanocrystallization in Anodic Oxide Films of Ti–Cu‐Based Bulk Metallic Glass and Its Effect on the Corrosion Resistance and Cytocompatibility

Advanced Engineering Materials, EarlyView.
Viktoriia Shtefan, Thorgund Nemec, Ute Hempel, Annett Gebert and coworkers demonstrate that anodic treatment of Ti–Cu‐based metallic glass in a nontoxic pyrophosphate electrolyte forms a protective bilayered Ti/Zr‐oxide film enriched with Cu nanocrystals.
Viktoriia Shtefan, Nora Fernández Navas, Thorgund Nemec, Ivan Kaban, Ute Hempel, Andrea Voss, Volker Hoffmann, Darius Pohl, Annett Gebert   +8 more
wiley   +1 more source

Design and experimental evaluation of a reconfigurable intelligent surface for wireless applications

Results in Engineering
Reconfigurable Intelligent Surfaces (RIS) have emerged as a transformative technology for enhancing wireless communication beyond 5 G and 6 G networks by dynamically manipulating signal propagation.
Haider TH.Salim ALRikabi, Adheed H. Sallomi, Hasan F. KHazaal, Ahmed Magdy   +3 more
doaj   +1 more source

Coherence Optimized Channel Estimation for Mm-Wave Massive MIMO [PDF]

Radioengineering, 2020
Mm-wave MIMO communication makes a hybrid combination of analog RF and digital baseband processing more attractive, where digital baseband precoders/combiners able to adapt to the pre-defined analog (switch based) RF processors.
F. Akram, I. Rashid, A. Ghafoor, A. M. Siddiqui   +3 more
doaj  

Electrochemical Behavior of Flame‐Sprayed Sc‐Doped AlCoCrFeMo High‐Entropy Alloy Coatings in 3.5% Sodium Chloride Solution

Advanced Engineering Materials, EarlyView.
Scandium (Sc)‐doped AlCoCrFeMo HEA coatings are fabricated via flame spraying with 0.1, 0.3, and 0.5 wt% Sc additions. Among these, the HEA‐Sc0.3 coating exhibits the highest corrosion resistance, indicated by a more positive corrosion potential and lower current density.
Pankaj Kumar, Akash Vyas, Mohammad Aatif Qazi, Nashit Jalal, Maria Ophelia Jarligo, Mostafa Yakout, Jing Liu, André McDonald   +7 more
wiley   +1 more source

Exploration of Intercell Wireless Millimeter-Wave Communication in the Landscape of Intelligent Metasurfaces

IEEE Access, 2019
Software-defined metasurfaces are electromagnetically ultra-thin, artificial components that can provide engineered and externally controllable functionalities.
Anna C. Tasolamprou, Alexandros Pitilakis, Sergi Abadal, Odysseas Tsilipakos, Xavier Timoneda, Hamidreza Taghvaee, Mohammad Sajjad Mirmoosa, Fu Liu, Christos Liaskos, Ageliki Tsioliaridou, Sotiris Ioannidis, Nikolaos V. Kantartzis, Dionysios Manessis, Julius Georgiou, Albert Cabellos-Aparicio, Eduard Alarcon, Andreas Pitsillides, Ian F. Akyildiz, Sergei A. Tretyakov, Eleftherios N. Economou, Maria Kafesaki, Costas M. Soukoulis   +21 more
doaj   +1 more source

Context Information for Fast Cell Discovery in mm-wave 5G Networks

, 2015
The exploitation of the mm-wave bands is one of the most promising solutions for 5G mobile radio networks. However, the use of mm-wave technologies in cellular networks is not straightforward due to mm-wave harsh propagation conditions that limit access ...
Capone, Antonio, Filippini, Ilario, Sciancalepore, Vincenzo   +2 more
core  

HI and OH absorption at z=0.89 [PDF]

, 1999
We report on WSRT observations of HI and OH absorption at z=0.885 towards the radio lens PKS 1830-21, mm wave transitions of several molecular species have already been observed at this redshift. At mm wavelengths the source structure is dominated by two
Chengalur, Jayaram N., de Bruyn, A. G., Narasimha, D.   +2 more
core   +1 more source

Encyclopedia of 2D β′‐In2Se3 Growth Using Chemical Vapor Deposition: The Effects of Synthesis Parameters Onto Material Quality

Advanced Engineering Materials, EarlyView.
A distinct semi‐confined inner‐tube chemical vapor deposition geometry enables reproducible, large‐area growth of phase‐pure 2D β′‐In2Se3 from InI + Se precursors. Engineering local vapor transport and optimizing precursor delivery and temperature–time conditions yield uniform continuous films.
Dasun P. W. Guruge, P. Sanju S. Panawala, Joseph F. S. Fernando, Zhenhuan Chen, Chao Zhang, Dong‐Chen Qi, Liangzhi Kou, Konstantin L. Firestein, Dmitri V. Golberg   +8 more
wiley   +1 more source