Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 6401 for “"array"”.
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Spherical antenna array
… pattern of an isotropic spherical antenna array with two types of element distributions, a latitude-longitude distribution and an approximately equally-spaced distribution, has been analyzed using Poisson's Sum Formula. Beamwidth expressions of both element distributions are found in …
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Hybrid ultrasonic array
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2001.
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Source array and receiver array analysis of Vogtland/ West Bohemia earthquake clusters
… die Universität Potsdam ein temporäres Array in Rohrbach, in einer Epizentraldistanz von etwa 10 km und mit einer Aperatur von etwa 0.75 km. 22 Erdbeben wurden für Quellarray- beam forming ausgewählt. Quellarrays sind örtliche Cluster von Erdbeben, die von einer Empfängerstation …
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Phased Array 802.11g Antenna
… involves the development of a 2.4GHz phased array antenna for consumer wireless applications. 802.11g specifications include 11 channels from 2.412 GHz to 2.472 GHz. Each channel has a 22MHz minimum bandwidth with a 5 MHz center-to-center interchannel spacing. Design goals for the phased …
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An Array Simulator Generator
… which facilitates the production of bit-serial array computer simulators. The resultant programs emulate the action of a target machine to the resolution of single instructions. The timing of interactions between independent modules is faithfully reproduced. The system is useful for the …
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Brain microelectrode array systems
New methods for manufacturing microelectrode array assemblies, passive devices designed for intracortically recording brain activity in nonhuman primates, were developed and explored. Wire electrical discharge machining (EDM), chemical etching, micromilling, parylene deposition, and laser ablation …
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Gene expression array simulator
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, June 2002.
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The diode array velocimeter
… has been developed and tested. The diode array velocimeter (DAV) uses a single laser beam for its probe. The DAV measures velocity within a seeded, transparent medium by timing the passage of a seed particle’s image across an array of PIN photodiodes. This prototype device can measure one …
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Digitally controlled microstrip phased array.
Adaptive phased arrays are versatile sensors which adjust themselves automatically and electronically to meet particular constraints. Such a constraint might be to minimise the level of interference or to enhance the desired signals or both simultaneously. This enhanced system performance. These …
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Gap Waveguide Array Element Filters
… which are directly integrated with antenna array elements are known as array element filters. The first filter is a third order filter centred at 100 GHz with a bandwidth of 4 GHz and 20 dB of passband return loss that was used to develop several filter components for the other filter …
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Portable colorimetric sensor array technology
U of I Only Restriction Lifted for Item 89476 on 2017-09-30T09:15:24Z.
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Acoustic vector-sensor array processing
… techniques for acoustic pressure-sensor arrays. Acoustic vector-sensor arrays, which measure particle velocity and pressure, offer significant potential but require fundamental changes to algorithms and performance assessment. This thesis develops new analysis and processing techniques …
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A microfabricated colloid thruster array
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2001.
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Acoustic vector-sensor array performance
… velocity. Velocity measurements can increase array gain and resolve ambiguities, but make vector-sensor arrays more difficult to analyze. This thesis derives a new set of useful performance measures for acoustic vector-sensor arrays. It characterizes the vector-sensor array beampattern with …
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Array processor support in GIPSY
The CSPI mini-MAP array processor is supported for use with a RATFOR preprocessor in the software environment defined by the Generalized Image Processing System (GIPSY). A set of interface routines presents the mini-MAP as a tightly-coupled slave processor with well-defined rules for control from …
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Antenna Array Systems: Propagation and Performance
… gains associated with the use of antenna arrays in wireless networks, it is inevitable that these technologies will become an integral part of future systems. This report focuses on signal propagation modeling for antenna array systems and on its relationship to the performance of these …
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Development of wideband phased array antenna
… GHz). While the second design wideband phased array antenna was realized by adding one element and meander line T-divider, partial ground plane and two slots at ground plane. The antenna was designed and optimized using CST Microwave studio (CSTMWS). The proposed antenna‟s parameters were …
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Sparse spectrum fitting in array processing
… (DOA) estimation using sensor arrays. By developing the sparse representation models for the spatial covariance matrix of correlated or uncorrelated sources respectively, the DOA estimation problem is reformulated under the framework of Sparse Signal Reconstruction (SSR). The …
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