A fast near-to-far-field transformation in body of revolution finite-difference time-domain method

We present an efficient near-to-far-field transformation technique to be used in conjunction with the body of revolution finite-difference time-domain (BOR/FDTD) algorithm. The efficiency is gained by factoring out the azimuthal angle /spl phi/ from the two-dimensional (2D) far-field integration usi...

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Bibliographic Details
Published inIEEE transactions on antennas and propagation Vol. 51; no. 9; pp. 2534 - 2540
Main Authors Farahat, N., Wenhua Yu, Mittra, R.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.09.2003
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Algorithm design and analysis
Algorithms
Antennas
Azimuthal angle
Bodies of revolution
Computational electromagnetics
Electromagnetic radiation
Electromagnetic scattering
Finite difference method
Finite difference methods
Horns
Magnetic field measurement
Mathematical analysis
Sampling methods
Time domain analysis
Transformations
Two dimensional
Two dimensional displays
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Summary:We present an efficient near-to-far-field transformation technique to be used in conjunction with the body of revolution finite-difference time-domain (BOR/FDTD) algorithm. The efficiency is gained by factoring out the azimuthal angle /spl phi/ from the two-dimensional (2D) far-field integration using an analytical approach, thereby reducing the 2D integral on the surface of the Huygens' box to a 1D version in the process. To illustrate the application of the proposed algorithm, the Potter horn is analyzed. The numerical results show good agreement with those obtained by using either analytical (where possible), or 2D integration schemes.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2003.816360