Multiple sweep method of moments analysis of electromagnetic scattering from 3D targets on ocean‐like rough surfaces

Çolak, Dilek; Burkholder, Robert J.; Newman, E. H.

doi:10.1002/mop.22074

Cited by 28 publications

(9 citation statements)

References 20 publications

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“…In addition, scattering patterns for several surface impedance values are presented and according to this numerical results it can be concluded that as the impedance mismatch between the scatterer and the free space increases, maximum field intensity also increases. As a future work, this solution can be asymptotically evaluated in order to improve higher order propagation models for terrain profiles [19]- [22]. In addition, contribution of the scatterer to the edge currents can be calculated by evaluating the scattered field in the paraxial region to be used as a benchmark solution for equivalent edge current approaches [23], [24].…”

Section: Discussionmentioning

confidence: 99%

Scattering From an Impedance Object at the Edge of a Perfectly Conducting Wedge

Ghassemiparvin

Altintas

2014

IEEE Trans. Antennas Propagat.

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Abstract-In this study, scattering from impedance bodies positioned at the edge of a perfectly electrically conducting wedge is investigated. In the treatment of the problem, eigenfunction expansion in terms of spherical vector wave functions is employed. A complete dyadic Green's function for the spherical impedance boss at the edge is developed. It is observed that the scattering is highly enhanced by the edge guided waves. Additionally, using T-matrix method, the solution is extended to the general case of irregularly shaped scatterers. The T-matrix solution is verified by applying it to the case of a spherical scatterer and results are compared with the dyadic Green's function solution.Index Terms-Dyadic Green's function, electromagnetic scattering, spherical vector wave functions, T-matrix, wedge scattering.

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Section: Discussionmentioning

confidence: 99%

Scattering From an Impedance Object at the Edge of a Perfectly Conducting Wedge

Ghassemiparvin

Altintas

2014

IEEE Trans. Antennas Propagat.

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“…The document shows the results of the query mesh, while coarse mesh grid cells 440 become symbiotic, the study was divided into a grid space of 11 × 20 × 2, the x-axis direction 11, so according microstrip antenna along the x-axis length L is 28mm, so the average grid cell size of 2.54mm, the length minus 1.27mm, continue to be the coarse mesh grid, and the results of HFSS simulation analysis, the analysis is complete after determining the computation time of 3 minutes 52 seconds, sweep analysis results, as well as absorbing boundary microstrip antenna electric field distribution inside the magnetic field distribution, as shown in Fig.6-7： Fig. 7 absorbing boundary and the electric field distribution of the magnetic field distribution inside the microstrip antenna As can be seen from the simulation results, the use of improved algorithm sweep analysis results [ 10 ] , as well as absorbing boundary of the magnetic field distribution of the electric field distribution inside the microstrip antenna is basically the same, so verify the rationality of this algorithm.…”

Section: Experimental Verificationmentioning

confidence: 99%

A new Zoning Graded Non-uniform Grid Generation Algorithm Including the Equivalent Width of Technology

Gong¹,

Yin²,

Yang³

et al. 2015

Proceedings of the 2015 International Conference on Electrical, Computer Engineering and Electronics

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Abstract. Analysis of the generation principle finite difference time domain (FDTD) grid， proposed non-uniform meshing algorithm based on the equivalent wi-dth of the geometric. In meshing software, we set R x , R y , R z . If reduced size along the x-axis model, it can be coarse mesh point on the basis of compliance with the numerical dispersion equation. Due to in the square mesh meshing size in the x, y, z direction is constantly changing,so get the equivalent size of the actual model, you need to obtain the average of the grid cell size along the direction of the coarse grid, is the ratio of the number of grid and size of the model. The half-size model of the grid is reduced by this average in the corresponding direction and getting the equivalent size model. And repeat the first step, conducted mesh. By numerical verification prove the accuracy and effectiveness of the new zoning graded non-uniform grid generation algorithm including the equivalent width of Technology in the FDTD simulation.

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“…Let and be the current and excitation vectors for the th block, respectively, and the matrix block containing the interactions between groups and is . The exact solution for given that is known, for , can be found by solving (4) where is the th diagonal (self) block. Next step is to construct a set of high-level basis functions, namely the CBFs, which represent each block (a portion of the terrain profile) by using (4)…”

Section: Formulationmentioning

confidence: 99%

Characteristic Basis Function Method for Solving Electromagnetic Scattering Problems Over Rough Terrain Profiles

Yağbasan

Tunc

Ertürk

et al. 2010

IEEE Trans. Antennas Propagat.

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A computationally efficient algorithm, which combines the characteristic basis function method (CBFM), the physical optics (PO) approach (when applicable) with the forward backward method (FBM), is applied for the investigation of electromagnetic scattering from-and propagation over-large-scale rough terrain problems. The algorithm utilizes high-level basis functions defined on macro-domains (blocks), called the characteristic basis functions (CBFs) that are constructed by aggregating low-level basis functions (i.e., conventional sub-domain basis functions). The FBM as well as the PO approach (when applicable) are used to construct the aforementioned CBFs. The conventional CBFM is slightly modified to handle large-terrain problems, and is further embellished by accelerating it, as well as reducing its storage requirements, via the use of an extrapolation procedure. Numerical results for the total fields, as well as for the path loss are presented and compared with either measured or previously published reference solutions to assess the efficiency and accuracy of the algorithm. Index Terms-Characteristic basis functions (CBFs), method of moments (MoM), forward-backward method (FBM), electromagnetic scattering, terrain propagation.

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Multiple sweep method of moments analysis of electromagnetic scattering from 3D targets on ocean‐like rough surfaces

Cited by 28 publications

References 20 publications

Scattering From an Impedance Object at the Edge of a Perfectly Conducting Wedge

Scattering From an Impedance Object at the Edge of a Perfectly Conducting Wedge

A new Zoning Graded Non-uniform Grid Generation Algorithm Including the Equivalent Width of Technology

Characteristic Basis Function Method for Solving Electromagnetic Scattering Problems Over Rough Terrain Profiles

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