A Hybrid Asymptotic-FVTD Method for the Estimation of the Radar Cross Section of 3D Structures

Fedeli, Alessandro; Pastorino, Matteo; Randazzo, Andrea

doi:10.3390/electronics8121388

Cited by 4 publications

(3 citation statements)

References 41 publications

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“…However, it still takes a long time to compute, and the limitation of storage remains its bottleneck [14]. On the other hand, differential methods like the finite-difference time-domain (FDTD) [15,16], the finite-volume time-domain (FVTD) [17][18][19], the finite element method (FEM) [7,20,21], and the spectral element method (SEM) [22][23][24][25][26][27] can effectively address high-contrast problems but have a limitation, according to which both the source and receiver points must be within the computational domain. This paper introduces a novel approach in which SEM is integrated with the integral method to establish a set of efficient, accurate, and versatile RCS calculation techniques applicable to arbitrary targets in a free space or layered media.…”

Section: Introductionmentioning

confidence: 99%

A Novel Radar Cross-Section Calculation Method Based on the Combination of the Spectral Element Method and the Integral Method

Zhao,

Chen,

Zhuang

et al. 2024

Symmetry

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This article proposes a novel method for calculating radar cross-sections (RCSs) that combines the spectral element method and the integral method, allowing for RCS calculations at any position in a free space or a half-space. This approach replaces the field source with an incident field using the scattered field equation of the spectral element method, enabling the arbitrary placement of the field source without being limited by the computational domain. By applying the superposition theorem and the volume equivalence principle, the scattered field of the objects at any position is obtained through integral equations, eliminating limitations on the computation points imposed by the computational domain. Based on Green’s function’s important role throughout the calculation process and its symmetry properties, the RCS calculation of symmetric models will be more advantageous. Finally, several examples, including symmetry models, are provided to validate both the feasibility and accuracy of this proposed method.

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Section: Introductionmentioning

confidence: 99%

A Novel Radar Cross-Section Calculation Method Based on the Combination of the Spectral Element Method and the Integral Method

Zhao,

Chen,

Zhuang

et al. 2024

Symmetry

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“…A possible solution is represented by the use of hybrid techniques, in which full-wave methods may be combined with approaches based on high-frequency approximations. This is the topic of the work presented in [4], where the finite volume time domain technique is hybridized with an asymptotic solution strategy based on physical optics and the equivalent current method.…”

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confidence: 99%

Electromagnetic Scattering and Its Applications: From Low Frequencies to Photonics

Fedeli

Gragnani

2021

Electronics

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“…In the academic world, it is very frequent to develop in-house simulation software from scratch, or alternatively to modify existing software packages in order to experiment new models and algorithms. In other words, the development of electromagnetic simulation software is still a wide research field itself, as witnessed by many recent papers on this topic (e.g., [2][3][4][5][6][7][8][9][10][11][12]). Of course, for advanced and high-level simulations, the use of commercial programs (sometimes combined with academic/research licenses) is customary.…”

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confidence: 99%

Open-Source Software for Electromagnetic Scattering Simulation: The Case of Antenna Design

Fedeli

Montecucco²,

Gragnani

2019

Electronics

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Electromagnetic scattering simulation is an extremely wide and interesting field, and its continuous evolution is associated with the development of computing resources. Undeniably, antenna design at all levels strongly relies on electromagnetic simulation software. However, despite the large number and the high quality of the available open-source simulation packages, most companies have no doubts about the choice of commercial program suites. At the same time, in the academic world, it is frequent to develop in-house simulation software, even from scratch and without proper knowledge of the existing possibilities. The rationale of the present paper is to review, from a practical viewpoint, the open-source software that can be useful in the antenna design process. To this end, an introductory overview of the usual design workflow is firstly presented. Subsequently, the strengths and weaknesses of open-source software compared to its commercial counterpart are analyzed. After that, the main open-source packages that are currently available online are briefly described. The last part of this paper is devoted to a preliminary numerical benchmark for the assessment of the capabilities and limitations of a subset of the presented open-source programs. The benchmark includes the calculation of some fundamental antenna parameters for four different typologies of radiating elements.

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A Hybrid Asymptotic-FVTD Method for the Estimation of the Radar Cross Section of 3D Structures

Cited by 4 publications

References 41 publications

A Novel Radar Cross-Section Calculation Method Based on the Combination of the Spectral Element Method and the Integral Method

A Novel Radar Cross-Section Calculation Method Based on the Combination of the Spectral Element Method and the Integral Method

Electromagnetic Scattering and Its Applications: From Low Frequencies to Photonics

Open-Source Software for Electromagnetic Scattering Simulation: The Case of Antenna Design

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