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About 10,000 papers for “Antenna array”
KULKARNI, ATUL · Figshare · 2023
First 22 samples for no fault condition, next 22 smaples are element 1 in fault, next element 2 in fault and so on till element 16 in fault. Afterword next group of 22 samples are all possible two elements in fault case. Hence, first 374 samples include no fault and single fault samples, and afterword 375-3014 represents 120 possible fault cases.
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Atul M. Kulkarni · Figshare · 2023
First 22 samples for no fault condition, next 22 smaples are element 1 in fault, next element 2 in fault and so on till element 16 in fault. Afterword next group of 22 samples are all possible two elements in fault case. Hence, first 374 samples include no fault and single fault samples, and afterword 375-3014 represents 120 possible fault cases.
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Ismail Hamieh, Ismail Ali Hamieh, A Ghz et al. · 2012
This online database contains the full-text of PhD dissertations and Masters ’ theses of University of Windsor students from 1954 forward. These documents are made available for personal study and research purposes only, in accordance with the Canadian Copyright Act and the Creative Commons license—CC BY-NC-ND (Attribution, Non-Commercial, No Derivative Works). Under this license, works must always be attributed to the copyright holder (original author), cannot be used for any commercial purposes, and may not be altered. Any other use would require the permission of the copyright holder. Students may inquire about withdrawing their dissertation and/or thesis from this database. For additional inquiries, please contact the repository administrator via email (scholarship@uwindsor.ca) or by telephone at 519-253-3000ext. 3208. Recommended Citation
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Martin H. Weik · 2000
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SpringerReference · 2011
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Deutsches Zentrum, Björn J. Döring, Björn J. Döring et al. · 2005
Active antenna arrays working at higher frequencies result in higher packaging densities. The antenna array under consideration operates at about 30 GHz and will be installed in an aircraft. Commercially available power amplifiers at these frequencies have an efficiency of typically 20 %, which results in high amounts of dissipated heat for the required high radiated power. The dissipated power, up to 9.5 kW as a worst case for a 50 × 50 element array, has to be transfered from the antenna to a heat exchanger or to the ambient air. Several cooling techniques including forced air and liquid cooling as well as heat pipes will be presented in this work, always considering the packaging density and the little space available. Simulations based on the software Flotherm led to the result that a liquid cooled cold plate is the most feasible approach while meeting all requirements. Experiments on a simplified model and comparison with simulations confirmed the results. Additionally, a forced air convection fin heat sink based on standard components was proposed, which can be used for an antenna demonstration model with 4 × 4 elements. Zusammenfassung Aktive Antennenarrays, die bei höheren Frequenzen betrieben werden, ziehen eine höhere Bauteildichte nach sich. Das zu untersuchende Array arbeitet bei rund 30 GHz und wird in Flugzeugen installiert werden. Kommerziell verfügbare Leistungsverstärker aber haben in diesem Frequenzbereich nur einen Wirkungsgrad von typischerweise 20 %. Dies bewirkt eine hohe Verlustleistung nicht zuletzt aufgrund der hohen benötigten Sendeleistung. Die Verlustleistung, die im ungünstigsten Fall 9,5 kW für ein Array mit 50 × 50 Elementen betragen kann, muss vom Inneren der Antenne zu einem Wärmetauscher oder an die Umgebungsluft abgeführt werden. Mehrere
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Летавин, Д. А., Letavin, D. A. · Electronic scientific archive of UrFU (Ural Federal University) · 2023
FIELD: radio engineering. SUBSTANCE: proposed transformable antenna array is characterized in that each emitter of the antenna array is placed on a separate dielectric substrate with a metal base located on the opposite side of the emitters, on which coaxial connectors and fastening elements are fixed, which are connected to the metal base at one end in a stationary manner, and the other end through the hole made in it is connected to the rod and adapted for moving along the horizontal axis of the latter, whereas the rod is equipped with clamps to set the required distance between adjacent radiators of the antenna array. EFFECT: formation of the required radiation pattern by adjusting the pitch of the antenna array emitters. 2 cl, 3 dwg.
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NASA/Langley Research Center · Bulletin of Miscellaneous Information (Royal Gardens Kew)
Photographed on: 04/13/2000. -- Tensioned membrane waveguide antenna array for space applications. People in photographs include Erik Vedeler, Robin Cravey, and Kenneth Dudley. Photographed in building 1299F, experimental test range.
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Raida, Zbyněk · Brno University of Technology Digital Library (Brno University of Technology) · 1993
The presented program is devoted to the analysis of general ekvidistant antenna arrays. "The Antenna Array" computes gain, radiation resistance and directivity patterns of antenna systems.
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Shun-Ping Chen, Heinz Schmiedel · 2024
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Leyh, Martin, Schühler, Mario, Schlicht, Michael et al. · Publikationsdatenbank der Fraunhofer-Gesellschaft (Fraunhofer-Gesellschaft) · 2016
Embodiments provide a phased array antenna comprising a feed structure adapted to guide an electromagnetic wave, a plurality of controllable elements coupled to the feed structure and a plurality of radiating elements, wherein each of the radiating elements is coupled to at least two of the plurality of controllable elements.
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Shun-Ping Chen, Heinz Schmiedel · 2024
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Michael L. Scott · 1999
This paper describes the development of a wideband radiating element suitable for use in a planar array. The design is a more compact form of the fan dipole reported by Bailey (1984). An experimental array of such dipoles was constructed in order to evaluate the mutual coupling between the elements and the embedded radiation patterns. An estimate of the active match is presented.
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Zbyněk Raida · Brno University of Technology Digital Library (Brno University of Technology) · 1993
The presented program is devoted to the analysis of general ekvidistant antenna arrays. "The Antenna Array" computes gain, radiation resistance and directivity patterns of antenna systems.
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WORLD SCIENTIFIC (EUROPE) eBooks · 2019
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2010
Big antennas can detect faint signals much better than small antennas. This chapter introduces arrays through a short historical development. Next, a quick overview of electromagnetic theory is given. Antenna arrays are extremely popular for use in radars in the microwave region. The frequency of an electromagnetic wave depends on the acceleration of charges in the source. Accelerating charges produce time-varying electromagnetic waves and vice versa. The chapter presents an approach for analytically finding fields for simple antennas that also forms the basis for some numerical approaches in the frequency domain. It describes the Antenna arrays find applications over a wide range of frequencies. Some common types of systems that depend on arrays. Controlled Vocabulary Terms adaptive radar; antenna arrays; electromagnetic propagation
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Shun-Ping Chen, Heinz Schmiedel · 2024
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Z. Raida · SHILAP Revista de lepidopterología · 1993
The presented program is devoted to the analysis of general ekvidistant antenna arrays. "The Antenna Array" computes gain, radiation resistance and directivity patterns of antenna systems.
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Franco Fuschini · AMS Campus - AlmaDL · 2015
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Shun-Ping Chen, Heinz Schmiedel · 2023
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