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Numerical methods for analyzing electromagnetic scatteringThe wave attenuation in a cylindrical waveguide coated with lossy dielectric material was studied. The scope was extended to the high frequency case for calculating attenuation coefficients and propagation constants of a dielectric coated circular waveguide. The magnetic material coating was studied. At low frequency a one way 3dB attenuation was achieved within a longitudinal distance of one diameter. A software program was generated to plot the field patterns of the lowest 30 modes in the cylindrical waveguides.
Document ID
19840024574
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Lee, S. W. (Illinois Univ. Urbana, IL, United States)
Lo, Y. T. (Illinois Univ. Urbana, IL, United States)
Chuang, S. L. (Illinois Univ. Urbana, IL, United States)
Date Acquired
September 4, 2013
Publication Date
September 24, 1984
Subject Category
Communications And Radar
Report/Patent Number
NAS 1.26:173916
NASA-CR-173916
Report Number: NAS 1.26:173916
Report Number: NASA-CR-173916
Accession Number
84N32645
Funding Number(s)
CONTRACT_GRANT: NAG3-475
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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