Application of geometric diffraction theory to scattering from cones and disks

Bechtel, M.

doi:10.1109/proc.1965.4066

Cited by 47 publications

(9 citation statements)

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“…the third type is the geometrical theory of Diffraction (GTD) [9][10][11][12][13] that is of similar accuracy to the PTD. This method was also modified into (a) uniform geometrical theory of diffraction by Kouyoumijian and Pathak [14], (b) uniform asymptotic technique by Ahluwalia et al [15] and Lee & Deschamps [16], and (c) High-Order Geometrical Theory of Diffraction by Bechtel [17] and Ryan & Peters [18] (of the 1st order), by Knott et al [19] (of the second order), and by Marsland et al [20] (of the higher-orders). The fourth type is the method of moments (MoM) or moment method (MM) [1] that is considered to be numerically exact.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Electromagnetic Scattering of Conducting Circular Disk Using a Hybrid Method

Li¹,

Kooi²,

Qiu³

et al. 1998

PIER

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Section: Introductionmentioning

confidence: 99%

Analysis of Electromagnetic Scattering of Conducting Circular Disk Using a Hybrid Method

Li¹,

Kooi²,

Qiu³

et al. 1998

PIER

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“…The scattering centre model has been widely utilized for imaging, feature extraction and automatic target recognition (ATR) in monostatic radar [1,2]. Both the theoretical calculation and measure experiments have shown that the monostatic scattering centres of an edge are only one or two points usually [3][4][5]. For the cone-shaped target, the monostatic scattering centres of the edge of the base are the intersection points of the edge and the plane constructed by the symmetry axis and incident ray [3,4].…”

Section: Introductionmentioning

confidence: 99%

Bistatic scattering centres of cone-shaped targets and target length estimation

Zou

et al. 2012

Sci. China Inf. Sci.

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The bistatic scattering centres are commonly modeled as the fixed scattering centres for imaging; however, the location of the bistatic scattering centre changes with the bistatic geometry in some real scenes. This paper focuses on the bistatic scattering centres of cone-shaped targets and considers how to utilize the length of the bistatic high-resolution range profile (HRRP) for target identification. Firstly, the locations of the bistatic scattering centres on the edge of a cone-shaped target are deduced with the method of equivalent currents, which are the intersection points of the edge and the plane constructed by the symmetry axis and the bisector of the bistatic angle. Then, based on the above conclusion, the wideband echo model and bistatic HRRP of a cone-shaped target is deduced. Then, the relation between the length of the bistatic HRRP and target length is deduced, which is useful for target identification. Finally, the bistatic HRRPs of cone-shaped targets are calculated via the Feko software and the calculated results validate the theoretical analysis. This research provides an exact mathematics model for the echo simulation, imaging, feature extraction and identification of cone-shaped targets in the bistatic radar.

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“…The third category presenting similar accuracy as PTD belongs to Geometrical Theory of Diffraction (GTD) [12,13]. Several modifications to this technique have been introduced by other researchers such as Uniform Geometrical Theory of Diffraction (UGTD) by Kouyoumijian and Pathak [14], Uniform Asymptotic Technique by Lee & Deschamps [15], and High-Order Geometrical Theory of Diffraction by Bechtel [16], Ryan & Peters [17] and by Marsland et al [18]. The fourth category is the Method of Moments (MoM) [1] and last category its Hybrid variants such as Hybrid Asymptotic Moment Method by Kaye, Murthy and Thiele [19,20].…”

Section: Introductionmentioning

confidence: 99%

Monte Carlo Integration Technique for the Analysis of Electromagnetic Scattering From Conducting Surfaces

Mishra¹,

Gupta²

2008

PIER

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Abstract-A new numerical method is proposed for the analysis of electromagnetic scattering from conducting surfaces. The method involves Monte Carlo integration technique in the Method of Moments solution of the Electric Field Integral Equation for determining the unknown induced current distribution on the surface of the scatterers. The unknown current distribution is represented in terms of a modified entire domain polynomial basis functions satisfying the appropriate edge conditions and symmetry conditions of the problem. This leads to very small order of the Method of Moments matrix as compared to the conventional sub-domain basis functions. The accuracy and the effectiveness of the method are demonstrated in three cases of scattering from conducting circular disks and results are compared with the solutions using conventional sub-domain basis functions. While the sub domain analysis is incapable of handling large domain problems, the proposed method overcomes this limitation. It is also observed that the proposed method is superior to conventional sub-domain method in dealing with singularity problem of the integral equation easily and efficiently.

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Application of geometric diffraction theory to scattering from cones and disks

Cited by 47 publications

References 1 publication

Analysis of Electromagnetic Scattering of Conducting Circular Disk Using a Hybrid Method

Analysis of Electromagnetic Scattering of Conducting Circular Disk Using a Hybrid Method

Bistatic scattering centres of cone-shaped targets and target length estimation

Monte Carlo Integration Technique for the Analysis of Electromagnetic Scattering From Conducting Surfaces

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