EM Modelling of Monostatic RCS for Different Complex Targets in the Near-Field Range: Experimental Evaluation for Traffic Applications

Tamayo‐Domínguez, Adrián; Lozano, Lorena; Somolinos, Álvaro; Cátedra, M.F.

doi:10.3390/electronics9111890

Cited by 8 publications

(6 citation statements)

References 20 publications

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“…The low-frequency scattering analysis approach is capable of producing reliable analysis results; however, the analysis timetends to grow as the frequency increases. The error rate in high-frequency scattering analysis grows in the dB scale rather than the linear scale as compared to low-frequency scattering analysis [4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Objectmentioning

confidence: 99%

RCS Prediction Using Prony Method in High-Frequency Band for Military Aircraft Models

Ahn

Koh

2022

Aerospace

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Obtaining Radar Cross Section (RCS) data, one of the essential parameters for aircraft design, generally takes a lot of time and cost. Measurement time and accuracy of measurement results may be affected depending on the RCS measurement method and environment. When it comes to the RCS measurement method, the direct approach, which measures RCS on a real item, is more accurate than the indirect approach, which is implemented through simulation. However, in consideration of balancing accuracy, time and cost, the indirect approach is more generally used due to its efficiency. In this paper, in order to find an optimized method for more improved prediction results of indirect approach in the high-frequency band, three prediction methods are proposed: the Prony method, the Matrix pencil method (MPM) and the Rational Function method. It is confirmed that the RCS prediction result utilizing the Prony method in the high-frequency band has the minimum error in the case of Prony and MPM Methods, which have not been utilized for RCS prediction in the high-frequency band, and the Rational function method with currently applicable cases are employed. The prediction methods are, respectively, applied to a model based on three military aircraft models such as Jet Plane, F-117 and Transport Plane, and its simulation is performed under identical conditions. The original data and the extrapolated data obtained from the methods are compared at a certain angle for each model, and the errors between the extrapolated data are also compared in order to verify the efficacy of the prediction methods.

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Section: Objectmentioning

confidence: 99%

RCS Prediction Using Prony Method in High-Frequency Band for Military Aircraft Models

Ahn

Koh

2022

Aerospace

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“…Highfrequency approximation methods based on approximation theories, while not matching the computational accuracy of full-wave techniques, have garnered attention due to their rapid computation and minimal resource requirements in various engineering applications. However, these high-frequency methods fall short of accurately simulating discontinuities on targets, such as edges and corners, or finely detailed structures with small electrical dimensions, especially when aiming for precise EM calculations of low observable echoes from stealth targets [19,20]. The numerical high-frequency hybrid algorithm extends the solution range to low/high frequencies globally, ensuring both algorithmic accuracy and high computational efficiency.…”

Section: Introductionmentioning

confidence: 99%

Efficient EM Scattering Modeling from Metal Targets Coated with Anisotropic Thin Layers

Hua,

2024

Electronics

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To address the challenges posed by composite targets composed of an anisotropic medium and metal in electromagnetic (EM) scattering calculations, this paper introduces an innovative hybrid algorithm tailored for simulating the EM scattering characteristics of such complex targets. Utilizing impedance boundary condition (IBC), the method employs surface impedance vectors to precisely depict the EM properties of the medium. By harnessing the distinct advantages of the Method of Moments (MoMs) at low frequency and Physical Optics (POs) at high frequency, the algorithm ensures both accuracy and efficiency in the EM simulation of composite targets. By transforming the EM scattering problem of targets coated with a thin-layered medium into an equivalent radiation problem of EM currents on impedance surfaces, this research has achieved rapid and high-precision calculations of the Radar Cross Section (RCS) for complex targets with anisotropic medium coatings. To assess the performance of the algorithm, three target models—square plates, simplified aircraft, and complex satellites—are selected as test cases. The dual metrics of RCS and surface current distribution are utilized as evaluation benchmarks, and comparisons are made against the Method of Moments–Finite Element Method (MoM-FEM) hybrid numerical method. The comparative results demonstrate that the proposed method meets the engineering standards in terms of both the root mean square error (RMSE) of RCS and the relative error in surface current distribution, while also achieving a significant improvement of over 50% in computational efficiency, thereby validating its superior accuracy and practical utility.

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“…The parameter considered for this evaluation is the Radar Cross Section (RCS). The RCS has been analyzed and recovered with different techniques: various models exist for canonical and metallic targets [1] [2], or more complex objects like the human body [3] [4]. For electrically large objects, high-frequency methods are used [5], such as physical optics (PO), geometrical theory of diffraction (GTD) [6], and uniform theory of diffraction (UTD) [7]; for resonant objects, full-wave approaches such as Method of Moment (MOM) [8], are required to characterize 3D scattering [9].…”

Section: Introductionmentioning

confidence: 99%

A Numerically Efficient Method for Predicting the Scattering Characteristics of Complex Moving Targets

Ahmed

Russo

Cerri

et al. 2023

IEEE Trans. Antennas Propagat.

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EM Modelling of Monostatic RCS for Different Complex Targets in the Near-Field Range: Experimental Evaluation for Traffic Applications

Cited by 8 publications

References 20 publications

RCS Prediction Using Prony Method in High-Frequency Band for Military Aircraft Models

RCS Prediction Using Prony Method in High-Frequency Band for Military Aircraft Models

Efficient EM Scattering Modeling from Metal Targets Coated with Anisotropic Thin Layers

A Numerically Efficient Method for Predicting the Scattering Characteristics of Complex Moving Targets

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