Results 81 to 90 of about 133,482 (276)

Port Decoupling for Small Arrays by Means of an Eigenmode Feed Network [PDF]

, 2008
An alternative approach to port decoupling and matching of arrays with tightly coupled elements is proposed. The method is based on the inherent decoupling effect obtained by feeding the orthogonal eigenmodes of the array.
Coetzee, Jacob, Yu, Y
core   +2 more sources

Innovating Aircraft Repair Processes: The Role of Digitalization in Sustainability

Advanced Engineering Materials, EarlyView.
This research explores how digitalization—by storing detailed non‐destructive testing data in structured DICONDE databases and creating a standard data model of the component—innovates aviation maintenance and repair processes. Coupled with a developed state‐based simulation model, it enables data‐driven, sustainable repair strategies that reduce waste,
Johanna Aigner, Geo Jacob, Florian Raddatz, Gerko Wende   +3 more
wiley   +1 more source

Effects of Ground Constituent Parameters on Array Mutual Coupling for DOA Estimation

International Journal of Antennas and Propagation, 2011
Effects of ground constituent parameters on the mutual coupling (MC) of monopole antenna array are investigated. This work augments an existing MC compensation technique for ground-based antennas and proposes reduction in mutual coupling for antennas ...
Irfan Ahmed, Warren F. Perger, Seyed A. Zekavat   +2 more
doaj   +1 more source

Design and layout strategies for integrated frequency synthesizers with high spectral purity [PDF]

, 2017
Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence
Herzel, Frank, Kissinger, Dietmar
core   +1 more source

Mutual Coupling Reduction between Asymmetric Reflectarray Resonant Elements

International Journal of Electrical and Computer Engineering (IJECE), 2018
A physically asymmetric reflectarray element has been proposed for wide band operations. The dual resonant response has been introduced by tilting one side of the square path element. The numerical results have been analyzed in the frequency band between 24GHz to 28GHz where a reflection phase range of more than 600° has been achieved.
Hashim Dahri, M., Jamaluddin, M. H., Inam, M., Kamarudin, M. R.   +3 more
openaire   +3 more sources

Interaction between Molten Al‐Killed Mn–B Steel and Carbon‐Bonded MgO Refractories Based on Recyclates

Advanced Engineering Materials, EarlyView.
High‐temperature interactions between low‐sulfur Al‐killed Mn–B steel and MgO–C refractories (0 and 50 wt% recyclates) are studied via finger immersion tests (1600 °C). Surface‐active elements influence infiltration. MgO/CaS layer forms, along with spinel and calcium silicate.
Matheus Roberto Bellé, Lukas Neubert, Anton Yehorov, Till M. J. Stadtmüller, Christos G. Aneziris, Olena Volkova   +5 more
wiley   +1 more source

Selectivity as a function of membrane thickness: gas separation and pervaporation [PDF]

, 1994
In this article, the pervaporation selectivity as a function of the membrane thickness is studied for the dehydration of acetic acid. From this study, it appeared that the selectivity of polysulfone (PSF), poly(vinyl chloride) (PVC), and ...
Koops, G.H., Mulder, M.H.V., Nolten, J.A.M., Nolten-Oude Hendrikman, J.A.M., Smolders, C.A., Smolders, C.A.   +5 more
core   +4 more sources

A Thermodynamic 3D Model for the Simulation of Diffusion‐Controlled Alloying Processes in Heterogeneous Material Structures

Advanced Engineering Materials, EarlyView.
A numerical model resulting from irreversible thermodynamics for describing transport processes is introduced, focusing on thermodynamic activity gradients as the actual driving force for diffusion. Implemented in CUDA C++ and using CalPhaD methods for determining the necessary activity data, the model accurately simulates interdiffusion in aluminum ...
Ulrich Holländer, Leonhard Holländer, André Langohr, Hans Jürgen Maier   +3 more
wiley   +1 more source

An Efficient 2-D DOA Estimation for a Cylindrical Conformal Array with Unknown Mutual Coupling

International Journal of Antennas and Propagation, 2018
The limited space of a conformal array may lead to a serious mutual coupling effect, which will significantly affect the performance of direction of arrival (DOA) estimation algorithms.
Chao Liu, Shunian Yin
doaj   +1 more source

Design of chipless UWB RFID system using A CPW multi-resonator [PDF]

, 2013
In this paper, the design of a novel chipless ultra-wideband radio-frequency identification (UWB RFID) system is proposed. The system employs printable uniplanar chipless tags and a pair of high-gain reader antennas.
Cheung, SW, Weng, Y, Yuk, TTI
core   +1 more source