Accession Number : ADA324048

Title :   Model for Nearfield Electromagnetic Shielding by Cylindrical Shells of Composite Materials.

Descriptive Note : Technical rept.,

Corporate Author : NAVAL UNDERSEA WARFARE CENTER NEWPORT DIV RI

Personal Author(s) : Obara, Michael D. ; Anderson, Theodore R.

PDF Url : ADA324048

Report Date : 16 OCT 1996

Pagination or Media Count : 36

Abstract : This report describes the shielding of sources by cylindrical shells of composite materials that are characterized by complex permeability and permittivity. The primary objective of the investigation is to develop a mathematical model of the magnetic, magnetizing, electric, and displacement fields as they exist in the presence of the cylindrical shell. This is accomplished by solving the magnetostatic problem, first by formulating the nearfield source in binomial expansions and the fields around the cylindrical shell in powers of Legendre polynomials and then by applying the boundary conditions of the fields to the cylindrical surface of the shell. The magnetostatic solution is used as input to alternate iterations of Faraday's law and Ampere's law to generate a perturbation expansion of the fields.

Descriptors :   *MATHEMATICAL MODELS, *ELECTROMAGNETIC SHIELDING, *MAGNETOSTATICS, ELECTROMAGNETIC FIELDS, ELECTRIC FIELDS, DIELECTRIC PROPERTIES, CYLINDRICAL BODIES, VECTOR ANALYSIS, PERTURBATIONS, PERMEABILITY(MAGNETIC), FARADAY EFFECT, ITERATIONS, NEAR FIELD, ELECTRODYNAMICS, LEGENDRE FUNCTIONS, BINOMIALS.

Subject Categories : Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE