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Parameter Estimation of Microwave Filters
Description:
The focus of this thesis is on developing theories and techniques to extract lossy microwave filter parameters from data. In the literature, the Cauchy methods have been used to extract filters’ characteristic polynomials from measured scattering parameters. These methods are described and some examples are constructed to test their performance. The results suggest that the Cauchy method does not work well when the Q factors representing the loss of filters are not even. Based on some prototype…
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Date:
December 2015
Creator:
Sun, Shuo
Partner:
UNT Libraries
Four-Channel Monitor for Airborne Radioactive Contaminants.
Description:
No Description Available.
Date:
January 1, 1968
Creator:
Woodward, W. J.
Item Type:
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Report
Partner:
UNT Libraries Government Documents Department
DEEP-BED FILTER PERFORMANCE TESTS.
Description:
No Description Available.
Date:
January 1, 1972
Creator:
Schurr, G. A.
Item Type:
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Report
Partner:
UNT Libraries Government Documents Department
Electric filter with movable belt electrode
Description:
A method and apparatus are disclosed for removing airborne contaminants entrained in a gas or airstream. The apparatus includes an electric filter characterized by a movable endless belt electrode, a grounded electrode, and a filter medium sandwiched therebetween. Inclusion of the movable, endless belt electrode provides the driving force for advancing the filter medium through the filter, and reduces frictional drag on the filter medium, thereby permitting a wide choice of filter medium materi…
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Date:
February 23, 1982
Creator:
Bergman, W.
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Patent
Partner:
UNT Libraries Government Documents Department
Particle collection efficiencies on cylindrical wires.
Description:
No Description Available.
Date:
January 1, 1972
Creator:
Sehmel, G.A.
Item Type:
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Report
Partner:
UNT Libraries Government Documents Department
Kilojoule laser system spatial filter analysis
Description:
No Description Available.
Date:
April 16, 1973
Creator:
Weaver, H.J.
Item Type:
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Report
Partner:
UNT Libraries Government Documents Department
Fire Protection of HEPA Filters by Using Water Sprays.
Description:
No Description Available.
Date:
January 1, 1972
Creator:
Gaskill, J. R. & Murrow, J. L.
Item Type:
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Report
Partner:
UNT Libraries Government Documents Department
AIR CLEANING STUDIES. Progress Report for July 1, 1954 to June 30, 1955
Description:
No Description Available.
Date:
October 15, 1956
Creator:
Dennis, R.; Silverman, L.; Billings, C. E.; Anderson, D. M.; Samples, W. R.; Donaldson, H. M., Jr. et al.
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Report
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UNT Libraries Government Documents Department
MAYPACK BEHAVIOR IN THE CONTAINMENT SYSTEMS EXPERIMENT: A PENETRATING ANALYSIS.
Description:
No Description Available.
Date:
January 1, 1969
Creator:
McCormack, J.D.
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Report
Partner:
UNT Libraries Government Documents Department
STUDY OF A MOLECULAR SIEVE FIRE.
Description:
No Description Available.
Date:
January 1, 1972
Creator:
Schmitt, C. R. & DeMonbrun, J. R.
Item Type:
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Report
Partner:
UNT Libraries Government Documents Department
EFFECT OF IODINE DECAY HEAT ON CHARCOAL ADSORBERS.
Description:
No Description Available.
Date:
January 1, 1971
Creator:
Shields, R.P. & Siman-Tov, M.
Item Type:
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Report
Partner:
UNT Libraries Government Documents Department
In-place testing of multiple stage HEPA filter plenums
Description:
No Description Available.
Date:
January 1, 1974
Creator:
Linck, F. J. & Geer, J. A.
Item Type:
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Article
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UNT Libraries Government Documents Department
Particle deposition in granular media. Annual progress report
Description:
Studies performed under Contract DE-AC02-79-ER10386.A000 Particle Deposition in Granular Media during the period June 1, 1979 to date are described. These studies include the design and construction of apparatus for filtration experiments and a complete trajectory analysis for the calculation of the initial collection efficiency of granular media. The results of the trajectory analysis have been used to develop a generalized correlation of the collection efficiency.
Date:
January 1, 1980
Creator:
Tien, C.
Item Type:
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Report
Partner:
UNT Libraries Government Documents Department
Signal enhancement by spectral equalization of high-frequency broadband signals transmitted through optical fibers
Description:
A new technique is discussed for signal strength enhancement of high-frequency (>1 GHz), spectrally-broad, analog signals through 1 km of optical fiber. The conventional method for optical measurement of high-frequency gamma ray signals is to use an optical fiber placed in the gamma radiation beam as a Cerenkov transducer. The radiation-induced optical signal is degraded by material dispersion in transmission through the fiber. To reconstruct the signal (which is carried by each wavelength) and…
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Date:
January 1, 1981
Creator:
Ogle, J. W.; Lyons, P. B. & Holzman, M. A.
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Article
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UNT Libraries Government Documents Department
Bias and self-bias of magnetic macroparticle filters for cathodic arc plasmas
Description:
Curved magnetic filters are often used for the removal of macroparticles from cathodic arc plasmas. This study addresses the need to further reduce losses and improving plasma throughput. The central figure of merit is the system coefficient Kappa defined as filtered ion current normalized by the plasma-producing arc current. The coefficient Kappa is investigated as a function of DC and pulsed magnetic field operation, magnetic field strength, external electric bias, and arc amplitude. It incre…
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Date:
December 1, 2002
Creator:
Byon, Eungsun & Anders, Andre
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Article
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UNT Libraries Government Documents Department
A Study of Efficiencies and Pressure Drop Characteristics of Air-Filtering Media
Description:
Removal of particles from air is discussed in terms of three classes of filtering media--air-sampling, respirator, and air-cleaning. Plots of efficiency versus filtering velocity are presented. The pressure drop characteristics of the filters are discussed in terms of initial pressure drops of the clean filters, variations in pressure drop of the individual filters, and comparison of loading rates.
Date:
August 10, 1953
Creator:
Adley, F. E.; Scott, R. H. & Gill, W. E.
Item Type:
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Report
Partner:
UNT Libraries Government Documents Department
Excerpts from the Proceedings of the French Academy of Science
Description:
The proposed arrangement is a velocity filter, to separate, from a beam of positive ions, the particular ones of a given velocity
Date:
1942
Creator:
Martelly, M. Julien & Cotton, M. Aime
Item Type:
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Report
Partner:
UNT Libraries Government Documents Department
Application of Linear Transforms and Estimation Theory to the Analysis of Chemical Data. Final Report, July 1, 1972-June 30, 1973
Description:
This report describes the results from work performed during the contract period of July 1, 1972 through June 30, 1973.
Date:
August 15, 1973
Creator:
Brubaker, T.A.
Item Type:
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Report
Partner:
UNT Libraries Government Documents Department
Lock-in Detector.
Description:
No Description Available.
Date:
January 1, 1970
Creator:
Mourlam, L., Jr. & Rhinehart, W. A.
Item Type:
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Report
Partner:
UNT Libraries Government Documents Department
NEUTRON DOSIMETRY WITH ACTIVATION FILTERS AND TLD.
Description:
No Description Available.
Date:
January 1, 1968
Creator:
Kocher, L F & Endres, G W.R.
Item Type:
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Report
Partner:
UNT Libraries Government Documents Department
Standleg Moving Granular Bed Filter development program
Description:
The design, fabrication, and installation of the cold flow test facility has been completed. The SMGBF test facility shown in Figure 2 consists of a solids feed hopper, a transparent test vessel, a screw conveyor, a 55-gal drum for solids storage, a dust feeder, a baghouse filter, and the associated instrumentation for flow and pressure control and measurement. The standleg is 11-in ID by 3-ft long, and also transparent to facilitate observation. The crushed acrylic particles of characteristics…
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Date:
January 1, 1992
Creator:
Newby, R.A.; Yang, W.C. & Smeltzer, E.E.
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Article
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UNT Libraries Government Documents Department
Moving Granular Bed Filter Development Program
Description:
The granular bed filter was developed through low pressure, high temperature (1600[degrees]F) testing in the late 1970's and early 1980's'. Collection efficiencies over 99% were obtained. In 1988, high pressure, high temperature testing was completed at New York University, Westbury, N.Y., utilizing a coal-fired pressurized, fluidized bed combustor. High particulate removal efficiencies were confirmed as it was shown that both New Source Performance Standards and turbine tolerance limits could …
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Date:
January 1, 1992
Creator:
Wilson, K. B.; Haas, J. C. & Eshelman, M. B.
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Article
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UNT Libraries Government Documents Department
In situ testing of tandem HEPA filter installations with a laser single particle spectrometer system
Description:
System components and methodology for in place testing of tandem HEPA filters are described. The system consists of a very high volume thermal DOP generator for producing sufficient challenge aerosol, a single particle intra-cavity laser particle spectrometer for high sensitivity detection, a forward light scattering photometer to measure challenge aerosol concentration, and a diluter to interface the spectrometer and photometer measurements. Results of the measurements on 11 tandem HEPA instal…
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Date:
January 1, 1978
Creator:
Schuster, B. G. & Osetek, D. J.
Item Type:
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Article
Partner:
UNT Libraries Government Documents Department
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