Efficient Technique for Calculating Near-Fields due to 2-D Sources

Abstract

Numerous methods exist to calculate near-fields from two-dimensional objects, however, relatively long computation times are generally required for reasonable accuracy. Computation is slowed primarily due to the calculation of near-fields using a singular kernel. The proposed work will develop an alternate, more efficient algorithm for calculating the near-fields from surface distributions. The Singularity Extraction Technique (SET) analytically extracts the contribution due to the near-singularity and implements the remaining portion numerically. Additionally, field contributions due to regions far removed from the field point are extracted out to further reduce the computational time. The implications here are a significant reduction in CPU time as well as improved accuracy. Computer programs are developed to implement and validate the SET. Testing includes comparison of the SET with analytic solutions to electromagnetic scattering for typical objects.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1990
Accession Number
ADA242537

Entities

People

  • Richard A. Rostant

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • C4I

DTIC Thesaurus Topics

  • Accuracy
  • Algorithms
  • Bessel Functions
  • Computations
  • Computer Programs
  • Computers
  • Contour Integrals
  • Differential Equations
  • Electromagnetic Fields
  • Electromagnetic Scattering
  • Engineering
  • Geometry
  • Partial Differential Equations
  • Physical Properties
  • Scattering
  • Two Dimensional
  • United States

Fields of Study

  • Physics

Readers

  • Computational Modeling and Simulation
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Wave Propagation and Nonlinear Chaotic Dynamics.