Analysis of electromagnetic scattering from typical targets for orbital‐angular‐momentum waves: Theoretical model

Zhang, Xiaoxiao; Su, Xiang; Wu, Zhensen; Ma, Li; Li, Xuping; Bai, Jing

doi:10.1049/mia2.12284

Cited by 4 publications

(4 citation statements)

References 23 publications

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“…Based on our previous work, the electric field of vortex waves can be decomposed into the superposition of plane waves with different elevation angle, α , and azimuthal angle, υ , which determines the propagation direction of decomposed plane waves. The transverse electric field of the incident vortex beams can be expressed as [21]…”

Section: Vortex Wave Scattering Model From a Rough Surfacementioning

confidence: 99%

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Analyzing Vortex Light Beam Scattering Characteristics from a Random Rough Surface

Zhang,

Su,

et al. 2023

Photonics

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The propagation and scattering of vortex light beams in complex media have significant implications in the fields of laser imaging, optical manipulation, and communication. This paper investigates the scattering characteristics of vortex light beams from a random rough surface. Firstly, a two-dimensional Gaussian rough surface is generated using the Monte Carlo method combined with the linear filtering method. Subsequently, the vortex beams are decomposed into the superposition of infinite plane waves, and the scattering of each plane wave from the rough surface is calculated using the Kirchhoff Approximation method. Numerical results of the angle distribution and spatial distribution of OAM scattering Laser Radar Cross Section (LRCS) are presented, varying with different surface roughness parameters for a rough aluminum surface and the beam’s parameters. The results demonstrate that the scattering of vortex beams is influenced by the beam’s parameters, such as Orbital Angular Momentum (OAM) mode number and elevation angle, which may bring new insights into vortex wave-matter interactions and their applications in high resolution imaging.

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Section: Vortex Wave Scattering Model From a Rough Surfacementioning

confidence: 99%

“…In our previous work, we obtained approximate numerical results of typical targets by plane wave expansion and coordinate system transformation [21]. Studying the scattering of vortex beams from rough surfaces may bring new insights into the vortex wave-matter interaction as well as new applications.…”

Section: Introductionmentioning

confidence: 99%

Analyzing Vortex Light Beam Scattering Characteristics from a Random Rough Surface

Zhang,

Su,

et al. 2023

Photonics

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“…Later in 2022, the scattering characteristics of a vortex beam incident on a metallic sphere [30] and an electrically large aircraft [31] were investigated using the physical optics (PO) method in conjunction with the angular spectrum expansion method. Zhang et al [32] analyzed in detail the theoretical scattering of OAM waves incident on typical targets; in particular, they simulated and analyzed the scattering characteristics of a perfect electric conductor and dielectric targets. It was found that the target RCS was greater for vortex-beam incidence than for plane-wave incidence.…”

Section: Introductionmentioning

confidence: 99%

Scattering Field Intensity and Orbital Angular Momentum Spectral Distribution of Vortex Electromagnetic Beams Scattered by Electrically Large Targets Comprising Different Materials

Sun,

Liu,

Guo

2024

Remote Sensing

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In this study, we obtained the intensity and orbital angular momentum (OAM) spectral distribution of the scattering fields of vortex electromagnetic beams illuminating electrically large targets composed of different materials. We used the angular spectral decomposition method to decompose a vortex beam into plane waves in the spectral domain at different elevations and azimuths. We combined this method with the physical optics algorithm to calculate the scattering field distribution. The OAM spectra of the scattering field along different observation radii were analyzed using the spiral spectrum expansion method. The numerical results indicate that for beams with different parameters (such as polarization, topological charge, half-cone angle, and frequency) and targets with different characteristics (such as composition), the scattering field intensity distribution and OAM spectral characteristics varied considerably. When the beam parameters change, the results of scattering from different materials show similar changing trends. Compared with beams scattered by uncoated metal and dielectric targets, the scattering field of the coating target can better maintain the shape and OAM mode of beams from the incident field. The scattering characteristics of metal targets were the most sensitive to beam-parameter changes. The relationship between the beam parameters, target parameters, the scattering field intensity, and the OAM spectra of the scattering field was constructed, confirming that the spiral spectrum of the scattering field carries the target information. These findings can be used in remote sensing engineering to supplement existing radar imaging, laying the foundation for further identification of beam or target parameters.

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“…Z. Wu studied the scattering characteristics of targets under vortex beams and concluded that the characteristics of targets were different when changing the OAM mode [20]. Compared with plane beams, vortex beams improve the ability of information acquisition and target detection [21][22][23]. B. Tang found that OAMs can carry more information than plane waves when passing through the chaff clouds [24].…”

Section: Introductionmentioning

confidence: 99%

Classification of Plates and Trihedral Corner Reflectors Based on Linear Wavefront Phase-Modulated Beam

et al. 2022

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Wavefront-modulated beams such as vortex beams have attracted much attention in the field of target recognition due to the introduced degrees of freedom. However, traditional wavefront-modulated beams are doughnut shaped, and are not suitable for radar detection or tracking. To solve this problem, a linear wavefront phase-modulated beam with a maximum radiation intensity in the center was proposed in a previous study. In this paper, we continue to study target characteristics under the linear wavefront phase-modulated beam. Through analysis of the target scattering based on the physical optics (PO) method, we find that a part of the monostatic or bistatic radar cross-section (RCS) of the target could be obtained by changing the phase gradient of the modulated beam. Taking this part of RCS for feature extraction, we recognize the plates and trihedral corner reflectors through the support vector machine (SVM) method. For data visualization, we use the t-distributed stochastic neighbor embedding (t-SNE) method for data dimensionality reduction. The results show that the recognition probability of the plates and trihedral corner reflectors can reach 91% with an antenna array having an aperture of 20 wavelengths when the signal-to-noise ratio (SNR) is 20 dB, while the traditional plane beam cannot classify these two targets directly.

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Analysis of electromagnetic scattering from typical targets for orbital‐angular‐momentum waves: Theoretical model

Cited by 4 publications

References 23 publications

Analyzing Vortex Light Beam Scattering Characteristics from a Random Rough Surface

Analyzing Vortex Light Beam Scattering Characteristics from a Random Rough Surface

Scattering Field Intensity and Orbital Angular Momentum Spectral Distribution of Vortex Electromagnetic Beams Scattered by Electrically Large Targets Comprising Different Materials

Classification of Plates and Trihedral Corner Reflectors Based on Linear Wavefront Phase-Modulated Beam

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