NDLI: Gtd analysis of airborne antennas radiating in the presence of lossy dielectric layers

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Gtd analysis of airborne antennas radiating in the presence of lossy dielectric layers

Content Provider	NASA Technical Reports Server (NTRS)
Author	Rojas-Teran, R. G. Burnside, W. D.
Copyright Year	1981
Description	The patterns of monopole or aperture antennas mounted on a perfectly conducting convex surface radiating in the presence of a dielectric or metal plate are computed. The geometrical theory of diffraction is used to analyze the radiating system and extended here to include diffraction by flat dielectric slabs. Modified edge diffraction coefficients valid for wedges whose walls are lossy or lossless thin dielectric or perfectly conducting plates are developed. The width of the dielectric plates cannot exceed a quarter of a wavelength in free space, and the interior angle of the wedge is assumed to be close to 0 deg or 180 deg. Systematic methods for computing the individual components of the total high frequency field are discussed. The accuracy of the solutions is demonstrated by comparisons with measured results, where a 2 lambda by 4 lambda prolate spheroid is used as the convex surface. A jump or kink appears in the calculated pattern when higher order terms that are important are not included in the final solution. The most immediate application of the results presented here is in the modelling of structures such as aircraft which are composed of nonmetallic parts that play a significant role in the pattern.
File Size	3390965
Page Count	114
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19820014524
Archival Resource Key	ark:/13960/t28961971
Language	English
Publisher Date	1981-08-01
Access Restriction	Open
Subject Keyword	Communications And Radar Diffraction Patterns Lossy Media Metal Plates Wave Scattering Geometrical Theory of Diffraction Aircraft Antennas Dielectrics Spheroids Surface Geometry Monopole Antennas Antenna Radiation Patterns Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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