Influence evaluation of UAV inlet on electromagnetic scattering and time-frequency characteristics

Sun, Xu-Min

doi:10.1088/1742-6596/1971/1/012019

Cited by 4 publications

(2 citation statements)

References 5 publications

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“…The study of rough surfaces and composite electromagnetic scattering [1][2][3][4][5][6] is of significant importance in both military and civilian applications.…”

Section: Introductionmentioning

confidence: 99%

Fast Coupling Iterative Algorithm for Media Rough Surface with Multiple Targets Below

Lei

2024

ACES Journal

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This paper proposes a fast mutual coupling iteration algorithm for analyzing the composite electromagnetic scattering characteristics of a Gaussian rough surface with multiple targets below it. Firstly, an electromagnetic scattering model of Gaussian rough surface with multiple targets underneath is established. To improve the efficiency of electromagnetic scattering calculations, the (banded matrix iterative approach canonical grid - conjugate gradient method (BMIA/CAG-CMG) algorithm is used to calculate the surface scattering of the rough surface, while for the scattering of the targets, the traditional numerical algorithm moment of methods (MoM) is used for the calculation. Its main acceleration principle is to decompose the matrix into banded and Toeplitz matrices during the solution process, and then use fast Fourier transform (FFT) for fast solution based on their characteristics. By comparing the calculation results of this algorithm with those of the MoM algorithm, the correctness of this algorithm is verified. Several examples are studied, and the impact of different parameters on the surface current and composite scattering characteristics is discussed, which have important significance for deepening the understanding of scattering characteristics in complex electromagnetic environments.

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“…The study of rough surfaces and composite electromagnetic scattering [1][2][3][4][5][6] is of significant importance in both military and civilian applications.…”

Section: Introductionmentioning

confidence: 99%

Fast Coupling Iterative Algorithm for Media Rough Surface with Multiple Targets Below

Lei

2024

ACES Journal

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“…The pipes attached to the jet engines are used as air inlets and exhaust outlet; see Figure 1(b). These pipes are usually modeled as open-ended conducting cylindrical tubes of practical dimensions with radial conducting blades placed inside the cylindrical cavity [2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Simulation for Robust Recognition Algorithm of Radar Target by Homing Missiles

Abd-Elfattah¹,

Hussein²,

Farahat³

et al. 2022

PIER B

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A novel signal processing scheme for identification of jet fighter targets by the onboard radar of active and hybrid homing missiles is proposed in the present work. For a specific target, the frequencies of the internal resonances of the cavity-backed apertures existing as the air-inlet pipes of the jet engine are used to construct an interior signature function for the proposed target identification scheme. For the purpose of quantitative description and assessment of the proposed scheme, electromagnetic simulation is used where the air-inlet pipe is modeled as an open-ended conducting cylinder with a number of radial conducting blades placed inside the cylindrical cavity near the open end. The transmitted radar pulse is formed by frequency chirping using linear frequency modulation (LFM) to include the frequencies in the band 1.0-2.0 GHz with high sweep resolution. The selected frequency band is wide enough to distinguish among various jet fighter targets. The CST R ⃝ simulator is used to evaluate the radar cross section (RCS) of the open-ended pipe model with the internal blades due to an incident chirped pulsed plane wave as mentioned above over the frequency band 1.0-2.0 GHz. The proposed target identification algorithm is mathematically described and computationally applied to identify different targets with different dimensions of the jet engine pipe. The effect of the additive white Gaussian noise (AWGN) on the correctness of the target identification decision using the proposed scheme is investigated by calculating the false alarm rate (FAR) with varying the signal-to-noise ratio (SNR). The numerical examinations show that the proposed algorithm succeeds in taking the correct decision regarding the target identification with FAR < 10% for SNR ≥ 12 dB.

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Scattering Echoes Modeling of UAV Swarm in Flight based on Vector Superposition

Liu

Zuo

et al. 2021

2021 13th International Symposium on Antennas, Propagation and EM Theory (ISAPE)

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Influence evaluation of UAV inlet on electromagnetic scattering and time-frequency characteristics

Cited by 4 publications

References 5 publications

Fast Coupling Iterative Algorithm for Media Rough Surface with Multiple Targets Below

Fast Coupling Iterative Algorithm for Media Rough Surface with Multiple Targets Below

Electromagnetic Simulation for Robust Recognition Algorithm of Radar Target by Homing Missiles

Scattering Echoes Modeling of UAV Swarm in Flight based on Vector Superposition

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