Solution of the General Helmholtz Equation Starting from Laplace's Equation

Abstract

In this paper we illustrate how to solve the general Helmholtz equation starting from Laplace's equation. The interesting point is that the Helmholtz equation has a frequency term whereas Laplace's equation is the static solution of the same boundary value problem. In this new formulation the frequency dependence is manifested in the form of an excitation. A new boundary integral method for solving the general Helmholtz equation is developed. This new formulation is developed for the two-dimensional Helmholtz equation with the method of moments Laplacian solution. The main feature of this new formulation is that the boundary conditions are satisfied independent of the region node discretizations. The numerical solution of the present method is compared with finite difference and finite element solutions of the same problem. Application of this method is also presented for the computation of cut-off frequencies for some canonical waveguide structures.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 2002
Accession Number
ADP013470

Entities

People

  • Magdalena S. Palma
  • Tapan K. Sarkar
  • Young-seek Chung

Organizations

  • Syracuse University

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Accuracy
  • Eigenvalues
  • Electrical Engineering
  • Electromagnetic Fields
  • Engineering
  • Finite Element Analysis
  • Frequency
  • Integral Equations
  • Iterations
  • Method Of Moments
  • Numerical Analysis
  • Semiconductor Devices
  • Semiconductors
  • Two Dimensional
  • Voltage
  • Wave Propagation
  • Waves

Fields of Study

  • Mathematics

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)