Author: United States. National Aeronautics and Space AdministrationPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Estimation Of Complex Permittivity Of Composite Multiplayer Material At Microwave Frequency Using Waveguide..., NASA/TM-2003-212398... National Aeronautics And Space Administration... May 2003
Author: United States. National Aeronautics and Space AdministrationPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Estimation of Complex Permittivity of Composite Multilayer Material at Microwave Frequency Using Waveguide Measurements
Author: Publisher: DIANE Publishing
ISBN: 1428995137
Category :
Languages : en
Pages : 80
Book Description
Estimation of Complex Permittivity of Composite Multilayer Material at Microwave Frequency Using Waveguide Measurements
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781720509790
Category :
Languages : en
Pages : 80
Book Description
A simple method is presented to estimate the complex dielectric constants of individual layers of a multilayer composite material. Using the MatLab Optimization Tools simple MatLab scripts are written to search for electric properties of individual layers so as to match the measured and calculated S-parameters. A single layer composite material formed by using materials such as Bakelite, Nomex Felt, Fiber Glass, Woven Composite B and G, Nano Material #0, Cork, Garlock, of different thicknesses are tested using the present approach. Assuming the thicknesses of samples unknown, the present approach is shown to work well in estimating the dielectric constants and the thicknesses. A number of two layer composite materials formed by various combinations of above individual materials are tested using the present approach. However, the present approach could not provide estimate values close to their true values when the thicknesses of individual layers were assumed to be unknown. This is attributed to the difficulty in modelling the presence of airgaps between the layers while doing the measurement of S-parameters. A few examples of three layer composites are also presented.Deshpande, Manohar D. and Dudley, KennethLangley Research CenterCOMPOSITE MATERIALS; ELECTRICAL PROPERTIES; MICROWAVE FREQUENCIES; SUBSTRATES; DIELECTRIC PERMEABILITY; ESTIMATING; ELECTRIC FIELDS; DIELECTRIC WAVEGUIDES; MICROWAVE TRANSMISSION; CERAMICS
Author: