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.

引用

页码：1 / 38

页数：38

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