High-frequency RCS of open cavities with rectangular and circular cross sections

Líu, Hao; Lee, S.-W.; Chou, Ri-Chee

doi:10.1109/8.24193

Cited by 83 publications

(43 citation statements)

References 10 publications

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“…The walls of the waveguide are assumed to be perfectly conducting. From the reciprocity theorem (3), this technique was applied in [15][16][17] …”

Section: First Step -Electromagnetic Fields Transmitted Into the Wavementioning

confidence: 99%

“…This is why for instance, hybrid boundaryintegral/modal approach was developed [5]. In high-frequency, when the cross section of the cavity is large comparatively to the incident wavelength λ 0 , asymptotic methods, like approaches based on ray tracing [6][7][8][9][10], Physical Optics [11][12][13][14] and modal analysis combined with the Kirchhoff Approximation for the boundary conditions [15][16][17] are also investigated. This paper applied this latter to an open ended cavity modeled as a succession of bent waveguides of same rectangular cross section and stuffed by a perfectly-conducting termination.…”

Section: Introductionmentioning

confidence: 99%

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RCS of Large Bent Waveguide Ducts From a Modal Analysis Combined With the Kirchhoff Approximation

Bourlier¹,

He²,

Chauveau³

et al. 2008

PIER

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Abstract-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 stuffed by a perfectly-conducting termination. Based on a modal analysis combined with the Kirchhoff 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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“…The walls of the waveguide are assumed to be perfectly conducting. From the reciprocity theorem (3), this technique was applied in [15][16][17] …”

Section: First Step -Electromagnetic Fields Transmitted Into the Wavementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

RCS of Large Bent Waveguide Ducts From a Modal Analysis Combined With the Kirchhoff Approximation

Bourlier¹,

He²,

Chauveau³

et al. 2008

PIER

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show abstract

“…The shooting and bouncing ray (SBR) method is proposed to study the scattering from cavity for decades [3,4,9], and it has been widely used in the simulation of electromagnetic wave scattering from cavity. The validity and accuracy of SBR method is proved in many papers available.…”

Section: Introductionmentioning

confidence: 99%

“…The problem of electromagnetic scattering from open-ended cavities has been studied intensively by various computational electromagnetic techniques for many years [1][2][3][4][5]. This problem serves as a simple model of duct structures such as Jet engine intakes or antenna windows embedded in more complex bodies [1,[6][7][8], and much research has been carried out on analysis of both radar cross section and electromagnetic pulse coupling [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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A Closed-Form Solution to Analyze RCS of Cavity With Rectangular Cross Section

Le¹,

Jin²,

Shi³

2008

PIER

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Abstract-In this paper, a set of formulas to analyze the scattering from open-ended rectangular cavity is presented on the basis of Shooting and Bouncing Ray (SBR) method. By analyzing the ray paths inside the cavity, the Physical-Optics (PO) integration on the aperture is carried out in a close form. Using closed-form solution, the Radar Cross Section (RCS) of cavity in high frequency can be studied sententiously and accurately. All the peaks and nulls in the RCS plot of cavity are predicted successfully with the formulas deduced in the paper, and a 3-D scattering pattern of rectangular cavity is simulated by the proposed method.

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Iterative physical-optics formulation for analyzing large waveguides with lossy walls

Obelleiro

Arajo

Rodrguez

2000

Microw. Opt. Technol. Lett.

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A generalization of the iterative physical‐optics (IPO) method is presented here in order to extend its scope of application to cavities with nonperfectly conducting walls. The behavior of the method is illustrated for the problem of a parallel‐plate waveguide. A pictorial display of the energy flow inside the waveguide is obtained, allowing us to attempt a deep understanding of the method, illustrating its behavior with the number of iterations, and demonstrating its great accuracy by comparison with ray‐based and modal reference solutions. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 28: 21–26, 2001.

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High-frequency RCS of open cavities with rectangular and circular cross sections

Cited by 83 publications

References 10 publications

RCS of Large Bent Waveguide Ducts From a Modal Analysis Combined With the Kirchhoff Approximation

RCS of Large Bent Waveguide Ducts From a Modal Analysis Combined With the Kirchhoff Approximation

A Closed-Form Solution to Analyze RCS of Cavity With Rectangular Cross Section

Iterative physical-optics formulation for analyzing large waveguides with lossy walls

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