Results 71 to 80 of about 25,027 (314)

Nondestructive Testing of Welded Composite Metal Foams

Advanced Engineering Materials, EarlyView.
X‐ray computed tomography (CT) is used to evaluate welded steel–steel composite metal foam (CMF) joints of two density classes. It reports variation in postweld spatial void distribution and correlates it to weld‐induced changes, mechanical performance, and failure within welded CMF panels.
Chinmaya Prerana Inguva, Aman Kaushik, Afsaneh Rabiei   +2 more
wiley   +1 more source

Design of Microstrip Antenna Arrays with Rotated Elements Using Wilkinson Power Dividers for 5 G Customer Premise Equipment Applications

International Journal of Antennas and Propagation
Microstrip antenna arrays are proposed in this paper for the customer premise equipment (CPE) applications in the frequency range 1 (FR1) of the 5th generation (5 G) mobile networks. The proposed antenna arrays consist of three FR4 substrates.
Ting-Yi Huang, Yun-Jhang Lee
doaj   +1 more source

Magnetoelectric Dipole Antenna Arrays [PDF]

IEEE Transactions on Antennas and Propagation, 2014
A planar magnetoelectric (ME) dipole antenna array is proposed and demonstrated by both full-wave analysis and experiments. The proposed structure leverages the operation of composite right/left-handed transmission lines under balanced conditions to form high-gain magnetic radiators, combined with radial conventional electric radiators, where the ...
Jiang, L, Gupta, S, Caloz, C
openaire   +4 more sources

Microstructure Reconstruction in Battery Electrodes Using Machine Learning Based on Low‐Voltage Focused Ion Beam–Scanning Electron Microscopy Tomography Images

Advanced Engineering Materials, EarlyView.
Low‐voltage FIB‐SEM tomography combined with a image preprocessing pipeline improves phase contrast and enables reliable machine‐learning segmentation of conductive networks in lithium‐ion battery electrodes. Structural descriptors are extracted from segmented images, done semimanually and automated, and compared.
Lisa Beran, Vincent Nebel, Dominik Perius, Kshitij Kumar, Yannis Heim, Laura Bies, Tobias Kraus   +6 more
wiley   +1 more source

Optimization of a 12.5 GHz microstrip antenna array using Taguchi's method [PDF]

, 2011
This Article is provided by the Brunel Open Access Publishing Fund - Copyright 2011 @ Hindawi PublishingThis paper presents Taguchi's optimization method implemented in the design of a single feed (without any matching network) 5×5 microstrip antenna ...
K. Tsiakmakis, Nilavalan, R, Charalampidis, N, N. Charalampidis, Spasos, M, S. W. Cheung, Tsiakmakis, K, Cheung, SW, R. Nilavalan, M. Spasos   +9 more
core   +1 more source

Angle-of-Arrival Estimation in Large-Scale Hybrid Antenna Arrays

, 2023
Large-scale hybrid antenna arrays are able to leverage array gains, transceiver sizes, and costs for massive multiple-input-multiple-output (MIMO) communications in the millimeter-wave and terahertz frequency bands.
Guo, YJ, Wu, K
core   +1 more source

From Shear to Sound: Mechanics–Acoustics Mapping of TPMS Lattices

Advanced Engineering Materials, EarlyView.
Triply periodic minimal surface (TPMS) lattices are mapped across mechanical and acoustic performance, revealing that descriptors validated in compression fail under shear. First‐time comparison with trusses included. A transition from porous to resonance‐driven absorption emerges at 25% density.
Lucía Doyle, María Ángeles Navacerrada, Johan Christensen, Carlos González   +3 more
wiley   +1 more source

Performance comparison of wideband circularly-polarized antenna arrays : comparison of microstrip-line- and metamaterial-line-based feed networks

, 2014
This paper presents performance comparison of two circularly-polarized antenna arrays where H-shaped antenna elements are used and arranged in fashion of planar sequential rotation in near-field region. The two identical arrays are fed by using the state-
Sergey Kharkovsky, Kwok L. Chung, Chung, Kwok L. (R17316), Kharkovsky, Sergey N. (R16906)   +3 more
core   +1 more source

The performance enhancement of multibeam adaptive base-station antennas for cellular land mobile radio systems [PDF]

, 1990
The problem of meeting the proliferating demands for mobile telephony within the confinement of the limited radio spectrum allocated to these services is addressed.
MCGEEHAN, J, Mark A. Beach, David J Edwards, Swales, SC, Edwards, DJ, Simon C. Swales, Joseph P. Mcgeehan, McGeehan, JP, SWALES, S, Beach, MA, BEACH, M, EDWARDS, D   +11 more
core   +1 more source

Designing Polymer Nanocomposites for X‐Ray Shielding: Mechanisms, Architectures, and Scalable Processing

Advanced Engineering Materials, EarlyView.
This review highlights advances in lightweight, lead‐free polymer nanocomposites for diagnostic X‐ray shielding. By linking filler chemistry, dispersion, architecture, and photon interaction mechanisms, it establishes structure–performance relationships guiding material design.
Aklilu G. Messele, Hossein Ipakchi, Tizazu H. Mekonnen   +2 more
wiley   +1 more source