A Wide Angle Split-Step Parabolic Equation Model for Propagation Predictions Over Terrain.

Abstract

The problem of radiowave propagation over irregular terrain is solved by using the wide angle parabolic equation method. The terrain is characterized by its height profile and its ground constants (here conductivity alpha goes to infinity). We consider horizontal polarization and treat the round as perfectly conducting (PEC) to simplify the formulation. This thesis uses a piece-wise conformal transformation to flatten the irregular terrain. The equations are solved by the split-step Fourier algorithm. A Hanning window is used both in spatial and in wavenumber domains to contain the computational domain. Effect of some numerical parameters such as the horizontal step size height of the computational domain on the accuracy of the solution is investigated. The numerical results are compared with available results for some typical propagation problems.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1996
Accession Number
ADA307444

Entities

People

  • Konstantinos Vlachos

Organizations

  • Naval Postgraduate School

Tags

DTIC Thesaurus Topics

  • Accuracy
  • Algorithms
  • Conformal Mapping
  • Coordinate Systems
  • Differential Equations
  • Electromagnetic Fields
  • Electromagnetic Wave Propagation
  • Engineering
  • Equations
  • Frequency
  • Geometry
  • Partial Differential Equations
  • Polarization
  • Radar
  • Refractive Index
  • Wave Propagation
  • Wide Angles

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)