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Article: Fast far-field approximation for calculating the RCS of large objects

TitleFast far-field approximation for calculating the RCS of large objects
Authors
Issue Date1995
PublisherJohn Wiley & Sons, Inc. The Journal's web site is located at http://www3.interscience.wiley.com/cgi-bin/jhome/37176
Citation
Microwave And Optical Technology Letters, 1995, v. 8 n. 5, p. 238-241 How to Cite?
AbstractA fast far-field approximation (FAFFA) is developed to estimate the RCS of conducting scatterers. This method accounts for the interaction between subscatterers in two ways, depending on the electrical distance between the subscatterers. The instructions of subscatterers separated by a large electrical distance are computed in three stages: (1) aggregation, which completes the total field at a group center due to the subscatterers of the group; (2) translation, which translates the field from one group center to another; and (3) disaggregation, which distributes the field in a group center to each subscatterer in the group. Two strategies are employed to accelerate the computation in the above three stages. One is the use of far-field approximation to simplify the computation in the translation stage; the other is the use of interpolation and smoothing techniques, which reduces the complexity of aggregation and disaggregation. The overall computational complexity for a matrix-vector multiplication is of the order of N1.33, and the memory requirement is of order N. Numerical results show that this method can predict a RCS that is very close to exact solution, and that the method can be applied to objects with very large electrical sizes.
Persistent Identifierhttp://hdl.handle.net/10722/182562
ISSN
2015 Impact Factor: 0.545
2015 SCImago Journal Rankings: 0.372

 

DC FieldValueLanguage
dc.contributor.authorLu, CauChangen_US
dc.contributor.authorChew, Weng Choen_US
dc.date.accessioned2013-05-02T05:15:52Z-
dc.date.available2013-05-02T05:15:52Z-
dc.date.issued1995en_US
dc.identifier.citationMicrowave And Optical Technology Letters, 1995, v. 8 n. 5, p. 238-241en_US
dc.identifier.issn0895-2477en_US
dc.identifier.urihttp://hdl.handle.net/10722/182562-
dc.description.abstractA fast far-field approximation (FAFFA) is developed to estimate the RCS of conducting scatterers. This method accounts for the interaction between subscatterers in two ways, depending on the electrical distance between the subscatterers. The instructions of subscatterers separated by a large electrical distance are computed in three stages: (1) aggregation, which completes the total field at a group center due to the subscatterers of the group; (2) translation, which translates the field from one group center to another; and (3) disaggregation, which distributes the field in a group center to each subscatterer in the group. Two strategies are employed to accelerate the computation in the above three stages. One is the use of far-field approximation to simplify the computation in the translation stage; the other is the use of interpolation and smoothing techniques, which reduces the complexity of aggregation and disaggregation. The overall computational complexity for a matrix-vector multiplication is of the order of N1.33, and the memory requirement is of order N. Numerical results show that this method can predict a RCS that is very close to exact solution, and that the method can be applied to objects with very large electrical sizes.en_US
dc.languageengen_US
dc.publisherJohn Wiley & Sons, Inc. The Journal's web site is located at http://www3.interscience.wiley.com/cgi-bin/jhome/37176en_US
dc.relation.ispartofMicrowave and Optical Technology Lettersen_US
dc.titleFast far-field approximation for calculating the RCS of large objectsen_US
dc.typeArticleen_US
dc.identifier.emailChew, Weng Cho: wcchew@hku.hken_US
dc.identifier.authorityChew, Weng Cho=rp00656en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0029636410en_US
dc.identifier.volume8en_US
dc.identifier.issue5en_US
dc.identifier.spage238en_US
dc.identifier.epage241en_US
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridLu, CauChang=8420262100en_US
dc.identifier.scopusauthoridChew, Weng Cho=36014436300en_US

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