FDTD Method Investigation on the Polarimetric Scattering From 2-D Rough Surface

Li, Juan; Guo, Lixin; Zeng, Hao

doi:10.2528/pier09120104

Cited by 34 publications

(31 citation statements)

References 24 publications

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“…Substituting (17) and (18) with (19) and (20) into (25), the updating equation for the E x in the slot can derived…”

Section: Updating Equations For the Aperture Couplingmentioning

confidence: 99%

“…where κ z Ex and κ z Hz are defined in (19) and (20) respectively. Using the approximation (29) and then the updating Eq.…”

Section: Updating Equations For the Aperture Couplingmentioning

confidence: 99%

“…Thin-slot formalism permits inclusion of conducting plates with arbitrarily narrow apertures or gaps without requiring any corresponding need to reduce the cell size to the gap width or depth for the FDTD analysis. Several Thin-slot formalisms have been proposed in the literature [18][19][20][21][22][23]. However, they are mostly for apertures having zero thickness, and when slots with finite thickness are involved, only the hybrid thin-slot algorithm (HTSA) can be effective [22].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Simple Local Approximation FDTD Model of Short Apertures With a Finite Thickness

Xiong¹,

Chen²,

Mao³

et al. 2012

PIER

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Abstract-This paper brings forward a simple local approximation finite-difference time-domain (FDTD) method for the analysis of short apertures with a finite thickness. By applying the equivalence principle together with a simple local approximation, the varying field distribution is accurately derived. The updating equations for the slot field can be derived by casting the field distributions into the contour paths containing the apertures. The method has been applied to two problems and the results are compared with the high-resolution standard FDTD simulation results and the measurement results. The accuracy of the proposed method is verified from the comparison of both the field distribution and the time-domain and frequency-domain slot coupling results. It is demonstrated that the local approximation is highly efficient and timesaving, and the present method is stable, numerically and computationally efficient.

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“…Substituting (17) and (18) with (19) and (20) into (25), the updating equation for the E x in the slot can derived…”

Section: Updating Equations For the Aperture Couplingmentioning

confidence: 99%

“…where κ z Ex and κ z Hz are defined in (19) and (20) respectively. Using the approximation (29) and then the updating Eq.…”

Section: Updating Equations For the Aperture Couplingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Simple Local Approximation FDTD Model of Short Apertures With a Finite Thickness

Xiong¹,

Chen²,

Mao³

et al. 2012

PIER

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show abstract

“…σ 0 denotes the backscattering coefficient of the ocean surface [24][25][26][27][28][29], calculated using the GIT model [2] in this work. The pattern propagation factor accounts for the effect of refractivity structure M and the pattern function of the transmitting antenna.…”

Section: Radar Wave Propagation Modelingmentioning

confidence: 99%

Evaporation Duct Retrieval Using Changes in Radar Sea Clutter Power Versus Receiving Height

Zhang¹,

Wu²,

Zhang³

et al. 2012

PIER

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Abstract-A method for retrieving evaporation duct height (EDH) is introduced in this paper. The proposed technique employs the changes in radar sea clutter power observed at different heights as input information. It identifies the EDH associated with the modeled clutter change pattern that best matches measured change patterns. The performance of the method is evaluated in terms of RMS errors in retrieving actual EDHs that range from 0 to 40 m. The comparison of the proposed method with the conventional clutter pattern matching method shows that the former more effectively retrieves actual EDHs.

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“…The finite-difference time-domain (FDTD) method [1] has been proven to be an established numerical technique that provides accurate predictions of field behaviors for electromagnetic interaction problems [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

High-Order Unconditionally-Stable Four-Step Adi-FDTD Methods and Numerical Analysis

Kong¹,

Chu²,

Li³

2013

PIER

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Abstract-High-order unconditionally-stable three-dimensional (3-D) four-step alternating direction implicit finite-difference time-domain (ADI-FDTD) methods are presented. Based on the exponential evolution operator (EEO), the Maxwell's equations in a matrix form can be split into four sub-procedures. Accordingly, the time step is divided into four sub-steps. In addition, high-order central finite-difference operators based on the Taylor central finite-difference method are used to approximate the spatial differential operators first, and then the uniform formulation of the proposed high-order schemes is generalized. Subsequently, the analysis shows that all the proposed high-order methods are unconditionally stable. The generalized form of the dispersion relations of the proposed high-order methods is carried out. Finally, in order to demonstrate the validity of the proposed methods, numerical experiments are presented. Furthermore, the effects of the order of schemes, the propagation angle, the time step, and the mesh size on the dispersion are illustrated through numerical results. Specifically, the normalized numerical phase velocity error (NNPVE) and the maximum NNPVE of the proposed schemes are lower than that of the traditional ADI-FDTD method.

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FDTD Method Investigation on the Polarimetric Scattering From 2-D Rough Surface

Cited by 34 publications

References 24 publications

A Simple Local Approximation FDTD Model of Short Apertures With a Finite Thickness

A Simple Local Approximation FDTD Model of Short Apertures With a Finite Thickness

Evaporation Duct Retrieval Using Changes in Radar Sea Clutter Power Versus Receiving Height

High-Order Unconditionally-Stable Four-Step Adi-FDTD Methods and Numerical Analysis

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