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

Author

Dockery, G. Daniel ; Kuttler, James R.

Author_Institution

Appl. Phys. Lab., Johns Hopkins Univ., Laurel, MD, USA

Volume

44

Issue

12

fYear

1996

fDate

12/1/1996 12:00:00 AM

Firstpage

1592

Lastpage

1599

Abstract

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

Keywords

Fourier transforms; HF radio propagation; computational complexity; discrete systems; electric impedance; microwave propagation; parabolic equations; tropospheric electromagnetic wave propagation; wave equations; 10 GHz; 10 MHz; 10 MHz surface wave propagation; Fourier split-step solutions; computation speed; discrete domain; effective rough surface impedance; improved impedance-boundary algorithm; parabolic wave equation; performance; rough sea surfaces; smooth sea surfaces; Electromagnetic propagation; Fourier transforms; Optical surface waves; Partial differential equations; Robustness; Rough surfaces; Sea surface; Surface impedance; Surface roughness; Surface waves;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.546245

Filename

546245