FDTD Study on Scattering of Metallic Column Covered by Double-Negative Metamaterial

Wang, M. Y.; Xu, Jin; Wu, Jian; Yang, Yu; Li, H. L.

doi:10.1163/156939307783152777

Cited by 42 publications

(32 citation statements)

References 18 publications

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“…Following, our research focuses on placing a dielectric layer consisting of left handed material on the surface of the human head model for further focusing improvement [20][21][22][23][24][25][26][27][28]. The scenarios which are examined are when the centre of the head model is set at the first focal point while the sources are kept still on the other focal point (case 1) and when the head model is placed in various positions inside the ellipse (case 2), (case 3).…”

Section: The Head Model Is Covered By a Dielectric Layer Consisting Omentioning

confidence: 99%

Electromagnetic Analysis of a Non Invasive Microwave Radiometry Imaging System Emphasizing on the Focusing Sensitivity Optimization

Giamalaki¹,

Karanasiou²,

Uzunoglu

2009

PIER

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Abstract-A Green's function based methodology has been developed and implemented with the view to optimize the focusing properties and thus the performance of a Microwave Radiometry Imaging System (MiRaIS). The system consists of an ellipsoidal conductive wall cavity and a sensitive radiometric receiver and its operation principal is based on the convergence of the radiation from one focal point, where the subject or phantom is placed, on the other, where the receiver antenna is positioned. A two-layered cylinder is used to model the human head with the semi-analytical Green's function technique. The imaging configuration is enhanced by different matching structures of various materials which are placed on the surface of both the human head model and the antenna inside the ellipsoidal. Numerical code executions have been realized and the results for the electric field distribution inside the head are presented for materials of various dielectric properties and for left handed materials at two different frequencies (0.5 GHz and 1.0 GHz). Increased sensitivity of the system focusing properties is observed using particular matching structures.

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Section: The Head Model Is Covered By a Dielectric Layer Consisting Omentioning

confidence: 99%

Electromagnetic Analysis of a Non Invasive Microwave Radiometry Imaging System Emphasizing on the Focusing Sensitivity Optimization

Giamalaki¹,

Karanasiou²,

Uzunoglu

2009

PIER

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“…Among existing numerical techniques, the finite-difference timedomain (FDTD) method has a wide applicability in many areas of research [5]. Higher order (HO) 3-D FDTD methodology to be a powerful numerical method for such complex and multiple materials structures simulation [6][7][8][9]. Furthermore, the development of high power microwave antenna, aviation and space techniques has motivated the interest in electromagnetic scattering problems involving combinative objects [10,20].…”

Section: Introductionmentioning

confidence: 99%

Time Domain Physical Optics for the Higher-Order FDTD Modeling in Electromagnetic Scattering From 3-D Complex and Combined Multiple Materials Objects

Faghihi¹,

Heydari

2009

PIER

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Abstract-This paper proposes a hybrid methodology that combines an extended form of Finite-Deference Time-Domain (FDTD) method with Time Domain Physical Optics (TDPO) for analysis of 3-D scattering of combinative objects in complex electromagnetic compatibility (EMC) problems. Establishing a covariant formulation for FDTD, the extended algorithm introduces a parametric topology of accurate nonstandard schemes for the non-orthogonal div-curl problem and the suppression of lattice dispersion. For complex-combined objects including a small size (SS) and large size (LS) parts, using TDPO is an appropriate approach for coupling between two regions. Thus, our technique solves the EMC complexity with the help of higher order FDTD (HOFDTD) and the combinatory structures by using the TDPO. Numerical validation confirms the superiority of the proposed algorithm via realistic EMC applications.

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“…Due to the above restrictions, iterative methods with extremely fast convergence (in just a few iterations) have recently been applied to bistatic RCS prediction. Finite Difference Time Domain (FDTD) [2], Current Marching Technique (CMT) [3], as the discrete space needs a huge number of grids and successive forward/backward calculations of the current demand for a longer time limit, do not apply to the bistatic prediction of electrically large conductive targets. The field marching technique [4] is obviously more accurate in large angle bistatic calculation, but it also has the paraxial limitations of the parabolic equation (PE) method.…”

Section: Introductionmentioning

confidence: 99%

Bistatic RCS Prediction for Complex Targets Using Modified Current Marching Technique

Li¹,

Xie²,

Yang³

2009

PIER

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Abstract-The improved high-frequency method for solving the bistatic scattering from electrically large conductive targets is presented in this paper. Since the previous physical optical methods overlooked the current impact of shadow zone and led to the increasing problems of the large angle bistatic calculation, the improved method is deduced by introducing the current marching technique into the conventional physical optical method. Combined with the graphicalelectromagnetic computing method that extracted the illuminated and shadow facet in accordance with the direction of the incident sort iteration, one may calculate the bistatic radar cross-section of a conductive targets object. The numerical results show that this method is efficient and accurate.

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FDTD Study on Scattering of Metallic Column Covered by Double-Negative Metamaterial

Cited by 42 publications

References 18 publications

Electromagnetic Analysis of a Non Invasive Microwave Radiometry Imaging System Emphasizing on the Focusing Sensitivity Optimization

Electromagnetic Analysis of a Non Invasive Microwave Radiometry Imaging System Emphasizing on the Focusing Sensitivity Optimization

Time Domain Physical Optics for the Higher-Order FDTD Modeling in Electromagnetic Scattering From 3-D Complex and Combined Multiple Materials Objects

Bistatic RCS Prediction for Complex Targets Using Modified Current Marching Technique

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