Singularity-Free Contour-Integral Representations for Physical-Optics Near-Field Backscattering Problem

Fan, Tian; Zhou, Xiao; Cui, Tie Jun

doi:10.1109/tap.2016.2647581

Cited by 11 publications

(2 citation statements)

References 28 publications

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“…Unfortunately, his nal expression su ers from the singularity problem when the projected point of the near-eld source falls right on the facet contour of the interesting target. Cui's valuable work [11] extends the Gordon's representation and presents a treatment to the singularity problem and to derive analogous contour-integral representations for both the electric and magnetic scattered elds. However, it is much complicated in the computation and only involves a mono-static scattering problem.…”

Section: Introductionmentioning

confidence: 99%

Near-Field Electromagnetic Scatterings and Imaging of a Ship Based on High-Frequency Techniques

Yang

Zhu

2022

International Journal of Antennas and Propagation

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In radar detection, it is important to investigate the near-field scattering characteristics since the far-field condition is not easily satisfied for the distance between the radar and the electrically large ship on the sea surface. A high-frequency techniques of the physical optics (PO) and shooting and bouncing rays (SBR) with local expansions based on the facets of the target are proposed to take the electromagnetic scatterings in the near zone. Therefore, it is a more straightforward method to modify the computation from traditional far-field problem to near-field problem with the singularity-free characteristic. Simulation results show that it has high accuracy but requires very little increase in computational costs in the near-field problem. Moreover, the 1-D high-resolution range profile (HRRP) demonstrates that the near-field scattering mechanism is much different from the cases in the traditional far-field problem.

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Section: Introductionmentioning

confidence: 99%

Near-Field Electromagnetic Scatterings and Imaging of a Ship Based on High-Frequency Techniques

Yang

Zhu

2022

International Journal of Antennas and Propagation

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“…However, when a high frequency and electrically large scatterer are considered [11], these methods become unattractive due to their high computational complexity. Fortunately, at such frequencies, the asymptotic techniques, such as the ray based method [12] and the PO-based methods [13][14][15][16][17][18], become applicable for the scatterers that are large and smooth on the wavelength scale. The ray tracing methods provide a phenomenological solution, cast in terms of the reflected and diffracted ray contributions, but suffer from high sensitivity to geometrical details and occasional failures [19].…”

Section: Introductionmentioning

confidence: 99%