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Asymptotic Waveform Evaluation (AWE) Technique for Frequency Domain Electromagnetic AnalysisThe Asymptotic Waveform Evaluation (AWE) technique is applied to a generalized frequency domain electromagnetic problem. Most of the frequency domain techniques in computational electromagnetics result in a matrix equation, which is solved at a single frequency. In the AWE technique, the Taylor series expansion around that frequency is applied to the matrix equation. The coefficients of the Taylor's series are obtained in terms of the frequency derivatives of the matrices evaluated at the expansion frequency. The coefficients hence obtained will be used to predict the frequency response of the system over a frequency range. The detailed derivation of the coefficients (called 'moments') is given along with an illustration for electric field integral equation (or Method of Moments) technique. The radar cross section (RCS) frequency response of a square plate is presented using the AWE technique and is compared with the exact solution at various frequencies.
Document ID
19970005000
Acquisition Source
Langley Research Center
Document Type
Technical Memorandum (TM)
Authors
Cockrell, C. R. (NASA Langley Research Center Hampton, VA United States)
Beck, F. B. (NASA Langley Research Center Hampton, VA United States)
Date Acquired
September 6, 2013
Publication Date
November 1, 1996
Subject Category
Communications And Radar
Report/Patent Number
NAS 1.15:110292
NASA-TM-110292
Report Number: NAS 1.15:110292
Report Number: NASA-TM-110292
Accession Number
97N12987
Funding Number(s)
PROJECT: RTOP 522-33-11-02
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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