DocumentCode :
1030060
Title :
An efficient multiregion model for electromagnetic scattering and radiation by PEC targets
Author :
Cui, Tie Jun ; Lu, Wei-Bing ; Qian, Zhi-Guo ; Hong, Wei ; Yin, Xiao-Xing
Author_Institution :
Dept. of Radio Eng., Southeast Univ., Nanjing, China
Volume :
52
Issue :
7
fYear :
2004
fDate :
7/1/2004 12:00:00 AM
Firstpage :
1707
Lastpage :
1716
Abstract :
An efficient multiregion model has been proposed for the fast implementation of the electromagnetic scattering by perfectly electrical conducting (PEC) targets and the radiation of point sources or wire antennas near PEC targets. In the multiregion model, the PEC target under consideration is divided by multiple regions depending on the position of point source/antenna or the incident direction of plane waves. Then the method of moments (MoM) is used on the first region, which is close to the source or is the illuminated region, to obtain the accurate electric current. The mutual coupling between different regions are considered approximately based on the magnetic-field integral equation, from which closed-form approximations for electric currents on other regions are derived. Because MoM is only performed on the first region, the number of unknowns in the new model is much fewer than that in the full MoM analysis, making the new model much more efficient. Compared with the published hybrid methods, the multiregion model gives a more reasonable physical explanation, and provides a better accuracy in both currents and scattered fields. Numerical simulations for two-dimensional (2-D) problems (transverse-magnetic/transverse-electric) and 3-D problems are given to test the validity and efficiency of the proposed modeling.
Keywords :
conducting bodies; electric field integral equations; electromagnetic wave scattering; magnetic field integral equations; method of moments; physical optics; MoM; PEC targets; electric field integral equation; electromagnetic radiation; electromagnetic scattering; hybrid methods; improved physical optics; magnetic-field integral equation; method of moments; multiregion model; mutual coupling; perfectly electrical conducting targets; plane waves incident direction; wire antennas; Current; Directive antennas; Electromagnetic modeling; Electromagnetic radiation; Electromagnetic scattering; Integral equations; Magnetic analysis; Moment methods; Mutual coupling; Wire; -method of moments; EFIE; Electric field integral equation; MFIE; MoM; PO; hybrid methods; improved physical optics; magnetic-field integral equation; method of moments; multiregion model; scattering and radiation;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.2004.831284
Filename :
1310630
Link To Document :
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