THE MODERN HIGH FREQUENCY METHODS FOR SOLVING ELECTROMAGNETIC SCATTERING PROBLEMS (Invited Paper)

Wu, Yu Mao; Chew, Weng Cho

doi:10.2528/pier15110208

Cited by 19 publications

(9 citation statements)

References 50 publications

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“…Contribution of the NU-diffracted field around the shadow boundary and in the deep shadow region (22) Here,…”

Section: High Frequency Scattered Fieldsmentioning

confidence: 99%

“…At this point, the electric scattered fields from the Fock currents on the 3-D convex sphere by the ILDC technique are formulated, with the expression given in Equation (22). It contains two terms, the first term corresponds to the PO scattered field and the NU-diffracted field in the scatterer's lit region.…”

Section: High Frequency Scattered Fieldsmentioning

confidence: 99%

“…In the lit and shadow regions of the considered convex scatterers, the Fock currents in Equation (14) or (16) have the highly oscillatory integrands, which are demonstrated in [20,22,23]. To efficiently evaluate the Fock currents, we propose the numerical contour deformation technique [20].…”

Section: The Efficient Numerical Contour Deformation Technique For Camentioning

confidence: 99%

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An Efficient Numerical Contour Deformation Method for Calculating Electromagnetic Scattered Fields From 3-D Convex Scatterers

Wu¹,

Chew²,

Jin³

et al. 2017

PIER

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Abstract-We consider the accuracy improvement of the high frequency scattered fields from 3-D convex scatterers. The Fock currents from the convex scatterers are carefully studied. Furthermore, we propose the numerical contour deformation method to calculate the Fock currents with frequency independent workload and error controllable accuracy. Then, by adopting the Fock currents and the incremental length diffraction coefficient (ILDC) technique, the scattered fields are clearly formulated. Compared to physical optics (PO) scattered fields from 3-D convex sphere, numerical results demonstrate significant accuracy enhancement of the scattered field via the Fock current approach.

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“…Contribution of the NU-diffracted field around the shadow boundary and in the deep shadow region (22) Here,…”

Section: High Frequency Scattered Fieldsmentioning

confidence: 99%

Section: High Frequency Scattered Fieldsmentioning

confidence: 99%

See 1 more Smart Citation

An Efficient Numerical Contour Deformation Method for Calculating Electromagnetic Scattered Fields From 3-D Convex Scatterers

Wu¹,

Chew²,

Jin³

et al. 2017

PIER

Self Cite

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“…The research on composite electromagnetic scattering of random rough surface covered by vegetation is significant for soil moisture retrieval, inversion model of vegetation parameter, and crop monitoring [1]. Due to the complexity of scattering mechanism in land surface environment, there are many problems about modelling methods and measurement technologies that remained to be solved recently.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Scattering of Rough Ground Surface Covered by Multilayers Vegetation

Yang

Luo

Yin

et al. 2019

International Journal of Antennas and Propagation

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A microwave scattering model is proposed for the ground surface covered with multilayers vegetation. The vegetation leaves are simulated with the discrete elliptical particles in layers, which are randomly distributed above the randomly rough surface. The finite element method is applied to solve the scattering magnetic field equation based on the Dirichlet boundary, and the relationship between the radar cross section and bidirectional reflectance distribution function is deduced with the coherent scattering field. The internal mechanism of microwave scattering of multilayers vegetation is explored with the numerical results, and the relationship of vegetation growing parameter with scattering characteristic is established.

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“…The composite electromagnetic scattering from an electrically large target in the sea background is of great significance for target recognition, sea surveillance, and radar image technology [1][2][3]. Although many numeric methods have been developed for the modeling of sea surface scattering for decades, the modulation relationship between radio wave and dynamic sea surface has not been completely realized.…”

Section: Introductionmentioning

confidence: 99%

Backscattering From Electrically Large Target Above Nonlinear Sea Surface

Luo¹,

Yang²,

Hao³

2017

PIER M

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Abstract-The composite scattering of an electrically large target above nonlinear sea surface is analyzed based on the reciprocity theorem. The two-dimensional nonlinear sea surface is simulated with the Fast Fourier transform (FFT), with which the phase modified two-scale method is utilized to calculate the scattering field of the wind-driven sea surface. The electromagnetic currents of the sea surface, which are excited with plane wave, are calculated with the iterated Kirchhoff approximation (KA). The coupling scattering between the target and the sea surface, which includes the complex scattering matrix of composite scattering, is ingeniously reduced to the integrals involving the target scattering and high order currents of sea surface. A sensitivity analysis is performed for the dependency of the coupling scattering on the target features. The relationship of the full composite scattering model with the sea state is examined, which provides theoretical basis for the target recognition.

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THE MODERN HIGH FREQUENCY METHODS FOR SOLVING ELECTROMAGNETIC SCATTERING PROBLEMS (Invited Paper)

Cited by 19 publications

References 50 publications

An Efficient Numerical Contour Deformation Method for Calculating Electromagnetic Scattered Fields From 3-D Convex Scatterers

An Efficient Numerical Contour Deformation Method for Calculating Electromagnetic Scattered Fields From 3-D Convex Scatterers

Electromagnetic Scattering of Rough Ground Surface Covered by Multilayers Vegetation

Backscattering From Electrically Large Target Above Nonlinear Sea Surface

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