Accession Number : ADP005653

Title :   Numerical Modeling: Integral Equation Method,

Corporate Author : DEUTSCHE FORSCHUNGS- UND VERSUCHSANSTALT FUER LUFT- UND RAUMFAHRT E V OBERPFAF FENHOFEN (GERMANY F R)

Personal Author(s) : Stein, K.

Report Date : JUN 1987

Pagination or Media Count : 20

Abstract : A review is given to the different expressions for the representation of the electromagnetic fields by integrals over the surface current. The integral equations, which mostly are used for the solution of practical problems, are discussed and the method of moments is outlined, where the use of pulses as basis functions is emphasized. Estimations of the core storage and the computer time are given. Two geometrical models for the scattering structure are discussed in more detail: the surface patch model and the wire-grid model. A list of application examples of the integral equation method with references is given. Two further examples are outlined in detail: computation of the radiation pattern of an antenna mounted on a helicopter and determination of the extreme near field of a cube. (Author)

Descriptors :   *TARGET CLASSIFICATION, *ELECTROMAGNETIC FIELDS, *NUMERICAL METHODS AND PROCEDURES, *MATHEMATICAL MODELS, ELECTRIC CURRENT, NATO.

Subject Categories : Target Direction, Range and Position Finding
      Radiofrequency Wave Propagation
      Theoretical Mathematics

Distribution Statement : APPROVED FOR PUBLIC RELEASE