A New Approach to Evaluate Accurately and Efficiently Electromagnetic Fields Outside a Bounded Zone with Time-Domain Volumic Methods

Mouysset, Vincent; Mazet, Pierre-Alain; Borderies, P.

doi:10.1163/156939306776143398

Cited by 7 publications

(7 citation statements)

References 6 publications

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“…The base of the extrapolating technique is scattering center model, which is suit for most of aircraft targets [22][23][24][25][26]. In addition, the existing RCS measurement systems generally are bistatic, the monostatic RCS can be gained according to the bistatic and monostatic RCS equivalence principle [27].…”

Section: Simulation and Experimentsmentioning

confidence: 99%

Overview of RCS Extrapolation Techniques to Aircraft Targets

Li¹,

Hu²,

Zhang³

et al. 2008

PIER B

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Abstract-In order to meet the approximate plane-wave irradiation condition, adequate large field or compact range system is needed for RCS measurement of large aircraft targets. However, an outside testing field site or a compact range system is very expensive, so some kinds of RCS extrapolation methods based on near-distance testing have been presented. In this overview, two categories of extrapolating technique are summed up, which are based on Huygens Equivalent Reradiating Source (HERS) and Inverse Synthetic Aperture Imaging (ISAI) respectively. Each method is fully elaborated. The comparison and analysis of these extrapolating techniques are discussed in detail.

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Section: Simulation and Experimentsmentioning

confidence: 99%

Overview of RCS Extrapolation Techniques to Aircraft Targets

Li¹,

Hu²,

Zhang³

et al. 2008

PIER B

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“…High-frequency techniques including geometrical theory of diffraction (GTD) [4], physical theory of diffraction (PTD) [5], and uniform theory of diffraction (UTD) [6] have obvious advantages in computing speed and memory demands, but the low computing precision limits their application. Then it is necessary to combine the low-and highfrequency techniques to form hybrid methods [7][8][9][10][11][12][13][14][15][16][17][18] for analyzing the radiation fields of antenna on large carrier.…”

Section: Introductionmentioning

confidence: 99%

Fast Hybrid Fem/Cre-Utd Method to Compute the Radiation Pattern of Antennas on Large Carriers

Zhang

Gong²,

Zhao³

2009

PIER

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Abstract-A hybrid method is developed to compute the radiation pattern of antennas on large complex three-dimension carriers. The hybrid method involves computing the radiation fields of the antenna in free space with FEM, characterizing the reflection and diffraction of the carrier to the radiation fields with CRE (Complex Ray Expansion) and UTD (Uniform Theory of Diffraction). The ray technique of SBR using traditional hybrid method is employed by CRE. The shortcomings of the SBR, such as great number of ray trace, distortion and partly shadowing of the rays etc., are overcome by the use of CRE, and the time consuming physical-optics-type integration is replaced by the paraxial approximation of the complex rays. A dipole placed on different carriers are taken as the examples to show the validity of the hybrid method, and the radiation patterns computed by the proposed method are in good agreement with those by FEM. By using the proposed method, the computation of the three dimension radiation pattern of an antenna in a large ship is finished by a PC in 1671.20 seconds.

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“…There is a growing interest in electromagnetic problems of broadband application and in recent times, time domain techniques [18] have been widely used for analyzing microwave cavities and circuits [7,10,15,41], electromagnetic scattering applications such as in short-pulse antenna radiation [17,[26][27][28], high-resolution radar scattering [5,36], and electromagnetic compatibility [5] and electromagnetic pulse interference problems [1,2]. Time domain methods have advantages over frequency domain like providing a broadband transient response from a single analysis.…”

Section: Introductionmentioning

confidence: 99%

Stencil Coefficient Computations for the Multiresolution Time Domain Method - A Filterbank Approach

Vaitheeswaran¹,

Narasimhan²

2008

PIER

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Abstract-Multiresolution Time Domain (MRTD) techniques based on wavelet expansions can be used for adaptive refinement of computations to economize the resources in regions of space and time where the fields or circuit parameters or their derivatives are large. Hitherto, standard wavelets filter coefficients have been used with the MRTD method but the design of such filter itself may enable to incorporate desired properties for different applications. Towards this, in this paper, a new set of stencil coefficients in terms of scaling coefficients starting from a half band filter, designed by window method and deriving a physically realizable filter by spectral factorization using cepstral technique, for the MRTD method is presented. These stencil coefficients for the MRTD are found to give good agreement with similar MRTD schemes such as those obtained using Daubechies orthogonal wavelets.

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A New Approach to Evaluate Accurately and Efficiently Electromagnetic Fields Outside a Bounded Zone with Time-Domain Volumic Methods

Cited by 7 publications

References 6 publications

Overview of RCS Extrapolation Techniques to Aircraft Targets

Overview of RCS Extrapolation Techniques to Aircraft Targets

Fast Hybrid Fem/Cre-Utd Method to Compute the Radiation Pattern of Antennas on Large Carriers

Stencil Coefficient Computations for the Multiresolution Time Domain Method - A Filterbank Approach

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