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Dissertations / Theses on the topic 'Measurement chamber'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Tian, Zhihao. "Efficient measurement techniques in reverberation chamber." Thesis, University of Liverpool, 2017. http://livrepository.liverpool.ac.uk/3009502/.

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The rapid expansion of electronic industry calls for effective and efficient electromagnetic (EM) measurements, including the characterization of devices under test (DUT), such as antennas or wireless devices, and the electromagnetic compatibility (EMC) testing. In the real world, EM measurements can be influenced by a number of uncontrollable factors which will afflict the measurements. These factors make the measurements very difficult especially when the measurements require high precision and/or low power relative to the background noise. To conduct EM measurements accurately, many differe

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2

Naftali, Verena Kashikuka. "Implementation of a reverberation chamber for electro-magnetic compatibility measurements." Thesis, Cape Peninsula University of Technology, 2017. http://hdl.handle.net/20.500.11838/2566.

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Thesis (MTech (Electrical Engineering))--Cape Peninsula University of Technology, 2017.<br>This research project focuses on the implementation of a Reverberation Chamber (RC) by the transformation of an existing electromagnetically shielded room. The reverberation chamber is a kind of shielded room designed to create a statistically random internal electromagnetic environment. The reverberating environment makes it possible to obtain high field strengths from a relatively low input power. The electric fields in the chamber have to be stirred to achieve a statistically uniform field. The first

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3

Heinson, Ann Patricia. "Position measurement in the ALEPH inner tracking chamber." Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/47107.

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4

White, E. "Respiration chamber-free measurement of oxygen consumption in sheep." Thesis, University of Reading, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372674.

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5

Vinci, Joseph J. "Sparse Aperture Measurement in a Non-Ideal Semi-Anechoic Chamber." University of Dayton / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1557426154482334.

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6

Schmid, Volker. "Design of a Two-Chamber-NO2-Fluorescence-Cell." PDXScholar, 1996. https://pdxscholar.library.pdx.edu/open_access_etds/5263.

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Nitrogen oxides control the photochemical production of ozone 03 in the lower atmosphere and influence the concentration of the hydroxyl radical HO in the troposphere. As an important member of the nitrogen oxide family, N02 plays a significant role in serving as the only known source of ozone (through photolysis) in the lower atmosphere and as sink for HO via formation of nitric acid. Therefore, accurate measurements of nitrogen dioxide are essential for the understanding of the processes that determine the distribution of tropospheric ozone and for assessing the impact of human activity on t

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7

Kianzad, Siamak. "Measurement of Thermal Insulation properties of TBC inside the Combustion chamber." Thesis, Luleå tekniska universitet, Materialvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-61917.

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This master thesis project was performed in collaboration with Scania CV AB, Engine Materials group. The purpose with the project was to investigate different ceramic TBC (Thermal Barrier Coating) thermal insulation properties inside the combustion chamber. Experimental testing was performed with a Single-Cylinder engine with TBC deposited on selected components. A dummy-valve was developed and manufactured specifically for this test in order to enable a water cooling system and to ease the testing procedure. The dummy-valve consists of a headlock, socket, valve poppet and valve shaft. Additio

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Saussus, Patrick T. "Investigation into sound sources for anechoic chamber qualification and related sound issues." Thesis, Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/17910.

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9

Aziz, Azhar Abdul. "Measurement of chemical species distribution by sampling from a diesel combustion chamber." Thesis, University of Manchester, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.680514.

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10

Perera, M. D. Nandana. "An evaluation of closed flux chamber technique for gas emission measurement from landfills." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0021/MQ49681.pdf.

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11

DiStasi, Stephen. "In Situ Measurement and Emulation of Severe Mulitipath Environments." ScholarWorks @ UVM, 2008. http://scholarworks.uvm.edu/graddis/68.

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ABSTRACT For a variety of wireless sensor network applications, sensor nodes may find their received signal strengths dominated by small-scale propagation effects. Particularly impacted are applications designed to monitor structural health and environmental conditions in metal cavities such as aircraft, busses, and shipping containers. Small changes in each sensor’s position or carrier frequency can cause large variations in this received signal strength, thereby compromising link connectivity. We leverage a technique called Wireless Sensors Sensing Wireless (WSSW) in which wireless se

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12

He, Yuhui. "Application of the reverberation chamber to the shielding effectiveness measurement of physically small enclosures." Thesis, University of York, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.516507.

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13

Carrier, Denis Joseph Gaston. "Automatic measurement of particles from holograms taken in the combustion chamber of a rocket motor." Thesis, Monterey, California. Naval Postgraduate School, 1988. http://hdl.handle.net/10945/22924.

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Approved for public release; distribution is unlimited<br>This thesis describes the procedure used for the automatic measurement of particles from hologram taken in the combustion chamber of a rocket motor while firing. It describes the investigation done on two averaging techniques used to reduce speckle noise, capturing the image focused on a spinning mylar disk and software averaging of several image frames. The spinning disk technique proved superior for this application. The Kolmogorov-Smirnov two-sample test is applied to different particle samples in order to find an estimate of

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14

Boriack, Cale Nolan. "Design and performance of an ammonia measurement system." Texas A&M University, 2005. http://hdl.handle.net/1969.1/4951.

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Ammonia emissions from animal feeding operations (AFOs) have recently come under increased scrutiny. The US Environmental Protection Agency (EPA) has come under increased pressure from special interest groups to regulate ammonia. Regulation of ammonia is very difficult because every facility has different manure management practices. Different management practices lead to different emissions for every facility. Researchers have been tasked by industry to find best management practices to reduce emissions. The task cannot be completed without equipment that can efficiently and accurately compar

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15

Whitis, Thomas James. "Measurement of Time Projection Chamber Optical Properties and Xenon Circulation System Development for The LZ Experiment." Case Western Reserve University School of Graduate Studies / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=case1543947238765113.

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16

Grudén, Mathias. "Wireless Sensor Network Systems in Harsh Environments and Antenna Measurement Techniques." Doctoral thesis, Uppsala universitet, Fasta tillståndets elektronik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-218891.

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Wireless sensor network (WSN) has become a hot topic lately. By using WSN things that previously were difficult or impossible to measure has now become available. One of the main reasons using WSN for monitoring is to save money by cost optimization and/or increase safety by letting the user knowing the physical status of the monitored structure. This thesis considers four main topics, empirical testing of WSN in harsh environments, antenna designs, antenna measurements and radio environment emulation. The WSN has been tested in train environment for monitoring of ball bearings and inside jet

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17

Bloom, Dylan C. "Design and Verification of a LabVIEW Automated Antenna Radiation Pattern Measurement System." DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/1916.

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In 2014, Toyon Research Corporation donated a 6’x6’x8’ anechoic chamber to the Cal Poly EE department to advance student education in the areas of antennas and wireless communications. An anechoic chamber is a room designed to suppress electromagnetic radiation reflections so that accurate measurement of radio frequency (RF) systems such as wireless radios and antennas can take place. Despite the fact that Cal Poly already has a larger anechoic chamber, primarily used for antenna characterization, it is the purpose of this project to design, code, and equip the new chamber so that it performs

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18

Fortune, Eugene C. IV. "Gamma and neutron dose profiles near a Cf-252 brachytherapy source." Thesis, Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/34781.

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A new generation of medical grade Cf-252 sources was developed in 2002 at the Oak Ridge National Laboratory (ORNL). The combination of small size and large activity of these Cf-252 sources makes them suitable to be used with the conventional high-dose-rate (HDR) remote afterloading systems for interstitial brachytherapy. A recent in-water calibration experiment showed that the measured gamma dose rates near the new source are slightly greater than the neutron dose rates; contradicting the well established neutron-to-gamma dose ratio of approximately 2:1 at locations near a Cf-252 brachytherapy

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Farina, Laura. "Measurement of community and laboratory-generated airborne particulates using a new sampling method." Scholar Commons, 2010. http://scholarcommons.usf.edu/etd/1628.

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This project resulted from an alleged dust problem affecting the residents in a Florida community. The residents claimed that there were elevated dust levels caused by a rock quarry adjacent to their homes. The purpose of this work was to assess total particulate, respirable particulate, and the coarse content of the sampled particles through traditional NIOSH methods, and using a new, real-time instrument known as the EPAM 5000. Data from the EPAM and NIOSH methods were compared to the EPA's particulate matter standards and the OSHA permissible exposure limits for total and respirable dust. D

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20

Benáček, Martin. "Klimatizační komora pro teplotní zkoušky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229062.

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Diploma thesis deals with measurement of temperature. The main goal of the thesis is to suggest and realize a Conditioning Chamber for Thermal Testing of small equipments and sensitive elements. The thesis is divided into theoretical and practical part. In the theoretical part are mentioned possibilities of miscue of measurement, equipments and sensitive elements for the measurement of temperature and their dividing. Furthermore, the measurement software and hardware is described for controlling and operating of the system. The practical part is detailing concept and realization of the setting

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21

Agyare, Benjamin A. "INVESTIGATION OF ATOMIC MOTION IN OPTICAL LATTICES VIA INTENSITY CORRELATION MEASUREMENT." Miami University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=miami1186171967.

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22

Bodon, K. Joshua. "Development, Evaluation, and Validation of a High-Resolution Directivity Measurement System for Played Musical Instruments." BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/5653.

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A high-resolution directivity measurement system at Brigham Young University has been renovated and upgraded. Acoustical treatments have been installed on the microphone array, professional-grade audio hardware and cabling have been utilized, and user-friendly MATLAB processing and plotting codes have been developed. The directivities of 16 played musical instruments and several loudspeakers have been measured by the system, processed, and plotted. Using loudspeakers as simulated musicians, a comprehensive analysis was completed to validate the system and understand its error bounds. A compari

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Salvatore, Pisasale. "Heat flux measurement device : Designing an experimental system for determining the effectiveness of thermal barrier coating inside a combustion chamber." Thesis, KTH, Maskinkonstruktion (Inst.), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-183999.

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This Masters Thesis has been carried out in collaboration with SCANIA CV AB and it concerns the development of an experimental measurement set up to analyze the heat losses in a Diesel engine. This measurement equipment will be used to test a type of coating, called TBC (Thermal Barrier Coating). Scania has been studying this kind of coating for some years and it has been noticed as a way to improve the efficiency of the engine. It is then important for the company to understand the behavior of this coating considering all the combustion’s features of an internal combustion engine. The target

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Kabir, Md Latiful. "A MEASUREMENT OF THE PARITY VIOLATING ASYMMETRY IN THE NEUTRON CAPTURE ON ³He AT SNS." UKnowledge, 2017. http://uknowledge.uky.edu/physastron_etds/45.

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Weak nucleon nucleon couplings are largely unknown because of the involved theoretical and experimental challenges. Theoretically the topic is difficult due to the non-perturbative nature of the strong interaction, which makes calculations of the couplings challenging. Experimentally, the topic is difficult given that 1) the observables are determined by ratios between strong couplings and weak couplings which differ in size by seven orders of magnitude, and 2) theoretically clean and predictable measurements are almost always restricted to simple systems that do not allow for effects that enh

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25

Stewart, Kristin Joy. "The development of new devices for accurate radiation dose measurement: a guarded liquid ionization chamber and an electron sealed water calorimeter." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=18423.

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In this work we developed two new devices that aim to improve the accuracy of relative and reference dosimetry for radiation therapy: a guarded liquid ionization chamber (GLIC) and an electron sealed water (ESW) calorimeter. With the GLIC we aimed to develop a perturbation-free energy-independent detector with high spatial resolution for relative dosimetry. We achieved sufficient stability for short-term measurements using the GLIC-03, which has a sensitive volume of approximately 2 mm3. We evaluated ion recombination in pulsed photon beams using a theoretical model and also determined a ne

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Chan, Kin Wa (Karl), University of Western Sydney, of Science Technology and Environment College, and School of Computing and Information Technology. "Lateral electron disequilibrium in radiation therapy." THESIS_CSTE_CIT_Chan_K.xml, 2002. http://handle.uws.edu.au:8081/1959.7/538.

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The radiation dose in radiation therapy is mainly measured by ion chamber. The ion chamber measurement will not be accurate if there is not enough phantom material surrounding the ion chamber to provide the electron equilibrium condition. The lack of electron equilibrium will cause a reduction of dose. This may introduce problems in treatment planning. Because some planning algorithms cannot predict the reduction, they over estimate the dose in the region. Electron disequilibrium will happen when the radiation field size is too small or the density of irradiated material is too low to provide

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Eun, Sangho. "HYDROGEN SULFIDE FLUX MEASUREMENTS AND DISPERSION MODELING FROM CONSTR." Master's thesis, University of Central Florida, 2004. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3234.

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Odor problems are a common complaint from residents living near landfills. Many compounds can cause malodorous conditions. However, hydrogen sulfide (h2s) has been identified as a principal odorous component from construction and demolition (c&d)debris landfills. Although several studies have reported the ambient concentrations of h2s near c&d landfills, few studies have quantified emission rates of h2s. The most widely used and proven technique for measuring gas emission rates from landfills is the flux chamber method. Typically the flux chamber is a cylindrical enclosure device with a spheri

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Zhang, Xiaotian. "Accurate wideband measurement of human body absorption cross section in reverberation chamber : a morphological parameters study from 1 GHz to 18 GHz." Thesis, University of York, 2017. http://etheses.whiterose.ac.uk/19455/.

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The human body absorption cross section (ACS) is important in the non-ionized dosimetry, indoor channel modelling, design of electrical biomedical devices, etc. In order to find the relations between morphological parameters and the human body ACS, we developed new measurement techniques which can obtain human body ACS quickly and accurately. Empirical models were inducted from the accurate measurement results, which enables the human body ACS to be quickly evaluated from the morphological parameters. Our researches include the following parts. First, the new measurement techniques which can g

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Ververs, James. "A quantitative method for reproducible ionization chamber alignment to a water surface for external beam radiation therapy depth dose measurements." VCU Scholars Compass, 2011. http://scholarscompass.vcu.edu/etd/2600.

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Ionization chambers (ICs) are the most commonly used detectors for radiation therapy dose measurements. Typical IC measurements use cylindrical ICs in a water phantom and therefore require initial IC alignment to the water surface. This alignment has long been ignored and only recently has a qualitative governing recommendation been made. This thesis describes a reproducible methodology for quantitative ionization chamber water surface alignment. Depth-ionization measurements are taken with twenty-eight IC designs under varying conditions including, but not limited to, changes in scan directio

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30

Larsson, Isak. "Utläsning av jonkammardata." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-176136.

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Tracercenter på Norrlands Universitetssjukhus producerar radiotracers. För att mäta aktiviteten hos de radioaktiva isotoperna används idag en jonkammare tillsammans med mjukvara byggt på Windows XP. Målet med det här examensarbetet är att bygga ny mjukvara som är kompatibelt med Windows 10. Mjukvaran ska tillhandahålla kalibreringsmöjligheter för isotoperna F-18, C-11 och Cs-137 samt kunna överföra uppmätt värde till datahanteringssystemet PETra.Med användandet av kodspråket Python och biblioteket TkInter har ett användargränsnitt och bakomliggande funktionskod utvecklats. Mjukvaran kommunicer

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31

Wallace, William, and Oskar Wiström. "Utveckling och tillverkning av flödestestkammare med högupplöst motstånd för kompaktfläktar : Mätinstrument som mäter statiskt tryck och luftflöde för framställning av fläktkurvor vid prestandamätning av kompaktfläktar." Thesis, Linköpings universitet, Mekanisk värmeteori och strömningslära, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-179130.

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Examensarbetet har utförts hos RotoSub AB i Linköping. RotoSub fokuserar på innovativa lösningar inom brusreducering för fläktar och är även utvecklingspartner med det österrikiska företaget Noctua, som utvecklar och tillverkar kompaktfläktar och processorkylare inom elektronikbranschen. Under examensarbetet har en flödestestkammare för kompaktfläktar utvecklats och tillverkats. Testkammaren utnyttjar ett högupplöst motstånd som ger möjlighet till ett flertal driftpunkter för att konstruera detaljerade fläktkurvor. Detta låter RotoSub noggrant analysera och undersöka fläktkaraktäristiken under

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32

Amharrak, Hicham. "Développement et optimisation de méthodes de mesures d'échauffements nucléaires et de flux gamma dans les réacteurs expérimentaux : identification, maîtrise, traitement et réduction des incertitudes associées." Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM4705.

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L'objectif de cette thèse vise à mettre au point et à améliorer les méthodes de mesures d'échauffements nucléaires auprès des maquettes critiques du CEA-Cadarache EOLE et MINERVE, au moyen de détecteurs thermo-luminescents (TLD), de détecteurs à luminescence optiquement stimulée (OSLD – nouvellement mis en œuvre dans le cadre de ce travail de thèse) et d'une chambre d'ionisation. Il s'agit d'identifier, de hiérarchiser, de traiter et enfin de réduire les différentes sources d'incertitudes et de biais systématiques associés à la mesure.Une série d'expériences a été mise en place dans le réacteu

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Kelm, Robert S. "In-water neutron and gamma dose determination for a new Cf-252 brachytherapy source." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28121.

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34

Váško, Ondřej. "Virtuální měřicí systém pro nestandardní bezodrazové komory." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-219966.

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Master thesis examines a selected part of electromagnetic compatibility. In this work, there is theoretically discussed how electromagnetic interference appears and how is spread through free space environment. To eliminate ambient interference signals, the measurements have been performed in anechoic chamber where the undesirable interference signals were suppressed. In the thesis, there are also described parameters of EMI receivers and limits of electromagnetic interference. The description of calculations of the antenna height for finding maximum intensity of electric field strength for st

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King, Laura Emily. "Development and testing of a fluorometric method and instrument based on the 2',7' dichlorodihydrofluorescin assay for the measurement of reactive oxygen species." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45943.

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An online, semi-continuous instrument to measure both total and gas phase atmospheric reactive oxygen species (ROS) and determine the concentration of ROS in the particle phase (ROS(p)) was developed. This instrument was based on a fluorescent probe for quantifying ambient ROS, specifically 2'7'-dichlorodihydrofluorescin, or DCFH probe. This probe was analyzed for sensitivity to a variety of offline and online parameters for efficient use in a field instrument. The ROS(p) instrument measures the peak light intensity at 530 nm to determine ambient ROS concentrations. ROS particles and gases are

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36

Wolf, Katharine. "A PORTABLE SENSOR FOR MEASURING GAS EMISSIONS FROM DAIRY COMPOST BEDDED PACK BARNS." UKnowledge, 2017. http://uknowledge.uky.edu/bae_etds/51.

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The objective of this study was to develop a gas measurement chamber for the comparison of emissions from different dairy manure storage facilities. Compost bedded pack (CBP) barns are a loose housing system in which cows rest on an intensely managed compost pack. Sawdust is the primary material added to the system, along with manure and urine inputs from the cows, and the pack is stirred one to two times daily. Maintaining a high level of aerobic microbial activity in the pack is critical for cow health. Previous dairy emissions work has not included compost bedded pack barns; it was expected

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Nasserdine, Mohamed M'Madi. "Mesure de la distribution du champ en chambre réverbérante par la théorie des perturbations : application à l'étude des directions d'arrivée." Thesis, Paris Est, 2015. http://www.theses.fr/2015PESC1026/document.

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Ce travail porte sur les techniques de mesure des champs en cavité électromagnétique et plus précisément en chambre réverbérante. En raison de la perturbation induite sur la distribution du champ au sein d'une cavité résonante par la présence d'un objet, les techniques de mesure de champ classiques utilisant une antenne souffrent d'une précision limitée. Par conséquent, nous proposons une nouvelle technique de mesure de la distribution du champ électrique basée sur la théorie des perturbations. Elle consiste à mesurer les variations de la fréquence de résonance de la cavité pour chaque positio

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Braish, Tamara. "Development of sensitive analytical and measurement methods for characterizing the emissions of SVOCs from building and consumer materials into indoor air." Thesis, Pau, 2019. http://www.theses.fr/2019PAUU3039.

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Les Composés Organiques Semi-Volatils (COSV), notamment les phtalates et retardateurs de flamme organophosphorés (RFOP), entrent dans la composition de nombreux matériaux de construction et produits de consommation. En effet, ils confèrent à ces produits des caractéristiques techniques spécifiques en tant que plastifiants ou retardateurs de flamme. Du fait de leurs propriétés physico-chimiques spécifiques, ces composés émis par les matériaux peuvent être présents à la fois en phase gazeuse mais également en phase adsorbée sur les surfaces et les poussières intérieures. Par conséquent, les voie

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Hoffmann, Mathias [Verfasser], Michael [Akademischer Betreuer] Sommer, Jürgen [Akademischer Betreuer] Augustin, and Georg [Gutachter] Wohlfahrt. "Improving measurement and modelling approaches of the closed chamber method to better assess dynamics and drivers of carbon based greenhouse gas emissions / Mathias Hoffmann ; Gutachter: Georg Wohlfahrt ; Michael Sommer, Jürgen Augustin." Potsdam : Universität Potsdam, 2019. http://d-nb.info/1218404264/34.

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Lust, Radek. "Malá testovací teplotní komora." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219825.

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This thesis focuses on the methodology of determining the parameters of Peltier batteries and the theory of construction of a cooling block on the basis of obtained parameters. Gathered information is then used for design and construction of a small test chamber for laboratory purposes.

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Saleh, Hassan. "Analogie microonde appliquée à l'étude de la diffraction par des arbres, par des particules atmosphériques et des micro-organismes." Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0299.

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Cette thèse élargie le champ des applications de l’analogie microonde en adaptant les techniques de fabrication permettant de contrôler les analogues et en développant un outil versatile et précis pour réaliser les mesures. L’analogie microonde consiste à transposer à l’échelle microonde les objets dont nous souhaitons étudier la diffraction en créant un analogue respectant le même rapport dimension sur longueur d’onde, et les mêmes propriétés morphologiques électromagnétiques. Une attention particulière a été portée aux objets faiblement diffractant ayant des niveaux SER aussi faibles que -60

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Xu, Qian. "Anechoic and reverberation chamber design and measurements." Thesis, University of Liverpool, 2015. http://livrepository.liverpool.ac.uk/2050739/.

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Two different chambers are studied in this thesis: the anechoic chamber (AC) and the reverberation chamber (RC). The AC has been developed for many years, while in the past few years RC has emerged as a promising facility not just in electromagnetic compatibility (EMC) measurements but also as a multi-disciplinary research facility in various areas. For the anechoic chamber, a CAD tool is developed to aid the design of an anechoic chamber. The objective is to estimate the chamber performance accurately. The ultimate goal is to minimise the cost but optimise the chamber performance for given co

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Deneš, Roman. "Měření elektromagnetického vyzařování v částečně a plně bezodrazových komorách." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-221241.

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This thesis is focused on a detailed analysis of the mechanisms of electromagnetic wave propagation in anechoic chambers. The analysis takes into account the influence of the measurement distance, setup of anechoic chamber and other parameters. Furthermore, the work deals with a validation of both types of anechoic chambers and examines the impact of selected parameters on the measurement results. Based on the theoretical analysis and practical measurement, the comparation between semi and fully anechoic chamber, or a three and ten meter measuring distance was made. This thesis also contains a

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Pometcu, Laura. "Matériaux et forme innovants pour l'atténuation en hyper fréquences." Thesis, Rennes 1, 2016. http://www.theses.fr/2016REN1S044/document.

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Les matériaux absorbants des ondes électromagnétiques sont des éléments importants pour l'évaluation de nombreux systèmes électroniques militaires mais également civils. Ces matériaux sont utilisés, par exemple, pour la réduction des interférences électromagnétiques (EMI) dans divers composants sans fils, la réduction de la surface équivalente radar (SER) ou comme absorbants à l'intérieur des chambres de mesures. C’est cette dernière application qui est visée par les travaux de cette thèse. L’objectif de mes travaux de thèse est d’optimiser des matériaux absorbants utilisés dans les chambres a

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Boyes, Stephen J. "Reverberation chambers and the measurement of antenna characteristics." Thesis, University of Liverpool, 2013. http://livrepository.liverpool.ac.uk/11481/.

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Over the past ten years, Reverberation Chambers (RC) have emerged as a promising facility for the measurement of antenna characteristics for the wireless communications industry. The RC has begun to diverge from its initial purpose of performing Electromagnetic Compatibility (EMC) measurements, as conceived by H. A. Mendes back in 1968. Unlike the Anechoic Chamber (AC) however, the RC facility and measurement protocols are relatively in their infancy whose standardisation is yet to be finalised. The purpose of this thesis is to present a further study into reverberation chambers and their asso

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Söderberg, Ludwig. "Measurement methodologies for controlling automotive radars in EMC chambers." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-66696.

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Autonomous cars are developing in a rapid speed, which means that the advanced driver-assistance systems must be tested carefully. Radar is one of many tools the car can use to detect obstacles and targets in front of the car. This bachelor thesis deals with programming and testing of an FMCW radar. The radar used in this thesis is an Continental ARS 308-2C/21 HS/AO, and the programming is written in Visual Basic. The goal within this project was to write a program for the Continental radar, and then measure static objects. The radar and the written program will be used in the research project

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Otterskog, Magnus. "Propagation Environment Modeling Using Scattered Field Chamber." Doctoral thesis, Örebro : Universitetsbiblioteket : Örebro University, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-731.

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Sawyer, Samuel Thomas. "Experimental Studies of Spacecraft Plasma Interactions: Facility Characterization and Initial Measurements." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/33714.

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The objectives of this thesis are to characterize the plasma environment of a new vacuum chamber facility at Virginia Tech and to perform initial measurements of plasma flow field for studying spacecraft-plasma interactions using this facility. An argon plasma environment was created using a hot filament cathode plasma source. Flange plates attached to the sides of the vacuum chamber were modified in order to attach various feedthroughs both now and in the future such that a probe array DAQ system could be used to expedite measurement and analysis. A Langmuir probe array was used to measure

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Hemavibool, Khuanjit. "Formaldehyde and hydrocarbon measurements in ambient air and in an environmental chamber." Thesis, University of Leeds, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.507731.

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Ortiz, Sean Christopher. "The design and construction of an anechoic chamber for automated antenna measurements." Honors in the Major Thesis, University of Central Florida, 1996. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/155.

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This item is only available in print in the UCF Libraries. If this is your Honors Thesis, you can help us make it available online for use by researchers around the world by following the instructions on the distribution consent form at http://library.ucf.edu/Systems/DigitalInitiatives/DigitalCollections/InternetDistributionConsentAgreementForm.pdf You may also contact the project coordinator, Kerri Bottorff, at kerri.bottorff@ucf.edu for more information.<br>Bachelors<br>Engineering<br>Electrical Engineering

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