Results 71 to 80 of about 57,628 (317)

Sidelobe Suppression in Array-Pattern Synthesis Using Periodic Leaky-Wave Antenna and Binomial Array

Modelling and Simulation in Engineering, 2020
This paper presents the conception and realization of a 2D antenna array using periodic leaky-wave antenna (PLWA) and the binomial array (BA) at 6 GHz as the application of WLAN. The series array of periodic leaky-wave antenna was provided by an array of
Hicham Aziz, Mahmoud Moubadir, Abdelkrim Farkhsi, Naima Amar Touhami   +3 more
doaj   +1 more source

Atacama compact array antennas [PDF]

SPIE Proceedings, 2012
We report major performance test results of the Atacama Compact Array (ACA) 7-m and 12-m antennas of ALMA (Atacama Large Millimeter/submillimeter Array). The four major performances of the ACA antennas are all-sky pointing (to be not more than 2.0 arcsec), offset pointing (to be < 0.6 arcsec) surface accuracy (< 25(20) micrometer for 12(7)m ...
Saito, Masao, Inatani, Junji, Nakanishi, Kouichiro, Naoi, Takahiro, Yamada, Masumi, Saito, Hiro, Ikenoue, Bungo, Kato, Yoshihiro, Morita, Kou-ichiro, Mizuno, Norikazu, Iguchi, Satoru   +10 more
openaire   +2 more sources

Direct Metal Deposition of Graphene–Ti28Nb35.4Zr Matrix Composites With Enhanced Mechanical, Corrosion, and Biocompatibility Properties for Bone Implants

Advanced Engineering Materials, EarlyView.
Graphene nanoplatelet (0.1 wt.%) reinforcement significantly enhances the performance of β Ti‐28Nb‐35.4Zr alloy. Grain refinement, reduced water contact angle, and improved surface characteristics promote osteoblast adhesion and complete surface coverage after 7 days.
Khurram Munir, Jixing Lin, Yuncang Li, Li Zhu, Paul F. A. Wright, Cuie Wen   +5 more
wiley   +1 more source

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

A new low profile antenna with improved performance for satellite on-the-move communications [PDF]

, 2009
A novel design solution for a low-profile fullduplex Satellite-On-The-Move Communications hybrid scanned phased array antenna for low elevation angle coverage (down to 10°) is described. The antenna is operated at Ku-Band.
Yuanyuan Jiang, Alistair Sambell, Foti, Steve, Smith, Dave, Stephen J Foti, Sambell, Alistair, Jiang, Yuanyuan, David Smith   +7 more
core   +1 more source

A Microwave/Millimeter Wave Dual-Band Shared Aperture Patch Antenna Array

IEEE Access, 2020
This paper describes the design of microwave/millimeter wave dual-band patch antenna array with shared aperture. The antenna array is designed of stack structure of three printed circuit boards.
Zongxin Wang, Zeqin Huang
doaj   +1 more source

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

A spectrum efficient cellular base-station antenna architecture [PDF]

, 1992
A concept is considered according to which using the spatial distribution of the users acquired by an array on reception, an antenna system can dynamically assign single narrow beams to illuminate lone mobiles, and broad beams to the numerous groupings ...
Swales, SC, McGeehan, JP, M.A. Beach, S.C. Swales, Beach, MA, J.P. McGeehan   +5 more
core   +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

Synthesis of Antenna Arrays and Parasitic Antenna Arrays with Mutual Couplings [PDF]

International Journal of Antennas and Propagation, 2012
A synthesis method to design multielement antennas with couplings is presented. The main objective is to perform a rigorous determination of the electromagnetic characteristics involved in the design, especially with arrays of moderate sizes. The aim is to conceive jointly and efficiently the antenna and the circuits to connect (feed distribution ...
M. Thevenot, C. Menudier, A. El Sayed Ahmad, G. Zakka El Nashef, F. Fezai, Y. Abdallah, E. Arnaud, F. Torres, T. Monediere   +8 more
openaire   +3 more sources