An improved impedance-boundary algorithm for Fourier split-step solutions of the parabolic wave equation

A new implementation of the previously published mixed Fourier transform (MFT) method for including impedance boundaries in split-step parabolic equation solutions is described and demonstrated. The new algorithm is formulated entirely in the discrete domain which results in extended applicability a...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 1996-12, Vol.44 (12), p.1592-1599
Main Authors: Dockery, D., Kuttler, J.R.
Format: Article
Language:English
Subjects:
Electromagnetic propagation
Fourier transforms
Optical surface waves
Partial differential equations
Robustness
Rough surfaces
Sea surface
Surface impedance
Surface roughness
Surface waves
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Description
Summary:A new implementation of the previously published mixed Fourier transform (MFT) method for including impedance boundaries in split-step parabolic equation solutions is described and demonstrated. The new algorithm is formulated entirely in the discrete domain which results in extended applicability and increased computation speed. A brief review of the original MFT solution is followed by a detailed description of the discrete formulation. The performance of the new algorithm is then demonstrated with a few examples which rely heavily on the accuracy of the impedance boundary. These examples include 10 MHz surface wave propagation over smooth and rough sea surfaces and 10 GHz calculations utilizing an effective rough surface impedance.
ISSN:0018-926X
1558-2221
DOI:10.1109/8.546245