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  • 1
    facet.materialart.
    Unknown
    Electromagnetic properties of material coated surfaces (1989)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The electromagnetic properties of material coated conducting surfaces were investigated. The coating geometries consist of uniform layers over a planar surface, irregularly shaped formations near edges and randomly positioned, electrically small, irregularly shaped formations over a surface. Techniques to measure the scattered field and constitutive parameters from these geometries were studied. The significance of the scattered field from these geometries warrants further study.
    Keywords: COMMUNICATIONS AND RADAR
    Type: NASA-CR-186466 , NAS 1.26:186466 , OSU-TR-720964-5
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Analysis of lossy composite terminating structures (1991)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A finite element solution and computer code for the electromagnetic scattering of inhomogeneous penetrable bodies is presented. The application for the code is for the analysis and design of leading and trailing edge terminations when conducting and nonconducting materials are used. Examples of simple triangular shaped terminations are also presented.
    Keywords: COMMUNICATIONS AND RADAR
    Type: NASA-CR-189901 , NAS 1.26:189901 , TR-723224-3
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Sinusoidal reaction formulation for radiation and scattering from conducting surfaces (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: A piecewise-sinusoidal reaction technique is proposed for the study of scattering and radiation from perfectly conducting bodies of arbitrary shape. The reaction technique described is a moment method based on the integral equation of an electric field. A theory of sinusoidal reaction formulation for radiation and scattering problems is outlined, in which the scattered field is obtained by integrating the surface currents. Numerical results are presented for the scattering patterns of rectangular plates and corner reflectors and the radiation patterns of corner-reflector antennas.
    Keywords: COMMUNICATIONS AND RADAR
    Type: IEEE Transactions on Antennas and Propagation; AP-23; May 1975
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Electromagnetic properties of ice coated surfaces (1989)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The electromagnetic scattering from ice coated structures is examined. The influence of ice is shown from a measurement standpoint and related to a simple analytical model. A hardware system for the realistic measurement of ice coated structures is also being developed to use in an existing NASA Lewis icing tunnel. Presently, initial measurements have been performed with a simulated tunnel to aid in the development.
    Keywords: COMMUNICATIONS AND RADAR
    Type: NASA-CR-184780 , NAS 1.26:184780 , ESL-720964-2
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    A high-frequency ray analysis of the electromagnetic backscattering by a two-dimensional ogive (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The electromagnetic backscattering from a two-dimensional ogive is examined, including a mechanism-by-mechanism account for the scattered field. The uniform theory of diffraction is used in conjunction with a simple creeping wave representation to yield a solution which provides an accurate and continuous backscattering result for a wide range of ogive geometry parameters. Although not a rigorous derivation of higher-order diffraction ceofficients, this solution provides insight into the relative contributions of the various creeping waves which are generated and propagate around the two-dimensional ogive. Comparisons with moment method calculations are used to demonstrate the range of applicability of this high-frequency asymptotic solution.
    Keywords: COMMUNICATIONS AND RADAR
    Type: Radio Science (ISSN 0048-6604); 27; 6; p. 991-997.
    Format: text
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    NASA TECHNICAL REPORTS
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