RCS OF LARGE BENT WAVEGUIDE DUCTS FROM A MODAL ANALYSIS COMBINED WITH THE KIRCHHOFF APPROXIMATION

被引：8
作者：
Bourlier, C. [1 ]
He, H. [1 ]
Chauveau, J. [1 ]
Hemon, R. [2 ]
Pouliguen, P. [2 ]
机构：
[1] Polytech Nantes, Lab IREENA, F-44306 Nantes 3, France
[2] CELAR, DGA, DET, F-35170 Bruz, France
来源：
PROGRESS IN ELECTROMAGNETICS RESEARCH-PIER | 2008年 / 88卷
关键词：
D O I：
10.2528/PIER08101708
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper, we present a fast method to predict the monostatic Radar Cross Section (RCS) in high-frequency of a cavity, which can be modeled as a succession of bent waveguides of the same cross section and studied by a perfectly-conducting termination. Based on a modal analysis combined with the Kirchho. Approximation, this method allows us to obtain closed-form expressions of the transmission matrix at each discontinuity. In addition, to improve the efficiency, a selective modal scheme is proposed, which selects only the propagating modes contributing to the scattering. Compared to the Iterated Physical Optics (IPO) method and the Multi-Level Fast Multipole Method (MLFMM, generated from the commercial software FEKO), this approach brings good results for cavities with small tilt angles of the bends, typically smaller than 2 degrees.
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页码：1 / 38
页数：38
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