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Guidelines for using the fast multipole method to calculate the RCS of large objects

✍ Scribed by Sunil S. Bindiganavale; John L. Volakis

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 501 KB
Volume: 11
Category: Article
ISSN: 0895-2477
DOI: 10.1002/(sici)1098-2760(199603)11:4<190::aid-mop7>3.0.co;2-f

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✦ Synopsis

i n this article we consider the implementation of a version of the fast multipole method for scattering by large objects. We put particular emphasis on error and erecution time. I n contrast to the traditional moment method, the fast multiple method (FMM) has an O(N'3 CPU requirement per incidence angle. This substantially reduced CPU time is achieved by subdiuiding the far-zone elements into p u p s whose weighted contribution is then interacted with the test element. The size of the groups and the various approximations used in the interaction of the groups play an important mle in the solution accumcy, but so far the effect of these parameters on the solution accumcy has not been considered. Guidelines are given for choosing the various parameters affecting the speed and solution accumcy of the method, such as the near-pup distance and sampling rate based on an error criterion. Our stue is canied out with refmnce to a version of the FMM refemd to as the fast far--field appmimatwn.

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