On the theory of diffraction by a composite cylinder

Journal Article · Sun Jan 01 04:00:00 EST 1961 · Journal of Research of the National Bureau of Standards, Section D: Radio Propagation

DOI:https://doi.org/10.6028/jres.065D.005· OSTI ID:4097540

D. Kodis, Ralph

Formulas are developrd for the diffracted field around a perfectly conducting cylinder with a dielectric sleeve of arbitrary thickness. These formulas represent the field due to a unit electric line source parallel to the cylinder (either inside or outside the dielectric sleeve) as a spectrum of radial eigenfunctions. In each case the field in the region containing the source can be expressed as the sum of two terms, the first of which is a spsectral representation of the field when the outer as well as the inner surface of the dielectric is a perfectly conducting boundary. The second term of the sum, which alone involves the properties of the dielectric, is an integral that converges rapidly at high frequencies. Using these general results, perturbation calculations are carried out for three limiting examples of plane wave scattering: (1) thin dielectric, (2) lowrefractive index, and (3) very small surface curvature. In the latter approximation the correspondence with optical results is shown.

• Research Organization: Brown Univ., Providence, R.I.
• Sponsoring Organization: USDOE
• NSA Number: NSA-15-009595
• OSTI ID: 4097540
• Journal Information: Journal of Research of the National Bureau of Standards, Section D: Radio Propagation, Journal Name: Journal of Research of the National Bureau of Standards, Section D: Radio Propagation Journal Issue: 1 Vol. 65D; ISSN 1060-1783
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CYLINDERS
DIELECTRICS
DIFFERENTIAL EQUATIONS
DIFFRACTION
EIGENFUNCTIONS
ELECTRIC CONDUCTIVITY
ELECTRIC FIELDS
ELECTRODYNAMICS
ELECTROMAGNETIC FIELDS
ELECTROMAGNETIC WAVES
FREQUENCY
INTEGRALS
PERTURBATION THEORY
PHYSICS
REFRACTION
SCATTERING
SURFACES
THICKNESS