Analysis of Scattering Fields From Moving Multilayered Dielectric Slab Illuminated by an Impulse Source

Zheng, Kuisong; Liu, Xiangpeng; Mu, Zongmin; Wei, Gao

doi:10.1109/lawp.2017.2700038

Cited by 12 publications

(4 citation statements)

References 10 publications

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Section: Introductionmentioning

confidence: 99%

“…The FDTD method has been used by several authors for analyzing electromagnetic problems with moving bodies [20][21][22][23][24][25][26][27][28][29]. In [22][23][24][25][26][27][28][29], the authors propose a technique based on the integration Voigt-Lorentz transformations in FDTD. The main challenges of such an approach are to implement a relative time in a full-wave simulator and to consider complex problems with, for example, multiple bodies moving at different speeds.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Moving Bodies with a Direct Finite Difference Time Domain Method

Marvasti,

Boutayeb

2024

ACES Journal

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This paper proposes an original and thorough analysis of the behavior of electromagnetic waves in the presence of moving bodies by using the finite difference time domain (FDTD) method. Movements are implemented by changing positions of the objects at each time step, through the classical FDTD time loop. This technique is suitable for non-relativistic speeds, thus for most encountered problems in antennas and propagation domain. The numerical aspects that need to be considered are studied. Then, different bodies in motion are examined: plane wave source with matching resistors, observation point, inclined partially reflecting surface (PRS), line source, and metallic cylinder illuminated by a plane wave. The results are compared with those of special relativity which are considered as the references. Some aspects of special relativity are present in the direct FDTD approach, such as the independence of the velocity of electromagnetic wave propagation with the speed of the source and Lorentz local time (with a different physical interpretation). It is shown that the amplitude of the electric field for a moving plane wave source does not increase with the speed of motion, if the impedance of the source is small. Moreover, for a moving scattering metallic wire, one can observe a phenomenon similar to shock waves.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of Moving Bodies with a Direct Finite Difference Time Domain Method

Marvasti,

Boutayeb

2024

ACES Journal

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“…An incident plane wave was introduced into the moving coordinate system, then the double Doppler effects for scattered fields of a moving conducting surface [18] and moving dielectric slabs [19] at different speeds were analyzed by the Lorentz-FDTD method. Reflected and transmitted fields from the moving multilayered dielectric slab illuminated by an impulse source were also discussed by the Lorentz-FDTD method [20]. By applying the Lorentz-FDTD method, bistatic radar cross sections of uniformly moving conducting and dielectric 2-D objects were analyzed and the Doppler effect, that is the function of the incident angle, the velocity vector of the object and the scattering angle, was also given in [21].…”

Section: Introductionmentioning

confidence: 99%

FDTD Analysis of Relativistic Bistatic Polarized Scattering From a High-Speed Moving Dielectric Coated Target

et al. 2023

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Development of hypersonic aircraft demands relativistic electromagnetic scattering modeling of a high-speed moving dielectric coated object, which is applied to the recognition and tracking of moving stealth object. However, far-zone polarized scatterings from a moving 3D dielectric coated object have not been investigated so far. This paper addresses this problem by combining the finite-difference time-domain method with Lorentz transformation (Lorentz-FDTD). Through Lorentz transformation and the principle of phase invariance, the frequency, propagation direction, magnitude of the incident plane wave and the size of the moving object in the laboratory frame, which is stationary with respect to the free space, are transformed to those in the rest frame that moves with the moving object. The scattered field near the object is solved by the FDTD method with full permittivity and conductivity tensors in the rest frame, then farzone polarized scattered field is obtained by the implementation of near-to-far field transformation. Through Lorentz transformation for coordinates, the polarized Radar Cross Sections (RCSs) of moving plasma coated objects are solved. Especially, the scattering characteristics of radial radar cross sections of moving objects are discussed. Several numerical experiments are carried out, the efficiency and the accuracy of the proposed method are validated. INDEX TERMS Finite-difference time domain (FDTD), Lorentz-transformation, high-speed, anisotropic media.

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“…The size, material, velocity, number, position of the spheres and the frequency of the incident wave can be selected arbitrarily, which makes studying of effective parameters possible. By considering the intrinsic inaccuracies of using numerical techniques, such as the finite-difference-time-domain method (FDTD) and Lorentz precise integration time-domain method (Lorentz-PITD), for a moving object [36][37][38][39][40][41][42], here the STR and Mie theory [43][44][45][46] are employed. Also, other kinds of motions for an individual object such as rotational [47][48][49][50][51] and vibrational [52][53][54] have been investigated, but, here the translational motion is of interest.…”

Section: Introductionmentioning

confidence: 99%

Four‐dimensional relativistic scattering of electromagnetic waves from an arbitrary collection of moving lossy dielectric spheres

Radpour

Pourziad

Sarabandi

2021

IET Microwaves Antenna & Prop

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Four‐dimensional (4D) relativistic scattering of electromagnetic waves from an arbitrary collection of uniformly translational moving lossy dielectric spheres is discussed. Two reference frames, four 4D coordinate systems and Lorentz transformation are used to obtain the scattered electromagnetic fields. The direct scattering of the spheres and their interactions are considered with a novel approach. The introduced method is straightforward and the analytical relations for the fields are achieved. To check the validity of the proposed method, different examples for both stationary and moving scatterers are investigated. The effects of key parameters such as the size, material, velocity, number, position of the spheres and also the frequency of the incident wave are discussed. The derived scattered fields are valid for low, medium and high velocities but according to practical applications low and moderate velocities are highlighted in numerical results.

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Analysis of Scattering Fields From Moving Multilayered Dielectric Slab Illuminated by an Impulse Source

Cited by 12 publications

References 10 publications

Analysis of Moving Bodies with a Direct Finite Difference Time Domain Method

Analysis of Moving Bodies with a Direct Finite Difference Time Domain Method

FDTD Analysis of Relativistic Bistatic Polarized Scattering From a High-Speed Moving Dielectric Coated Target

Four‐dimensional relativistic scattering of electromagnetic waves from an arbitrary collection of moving lossy dielectric spheres

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