An Evaluated PMCHWT Solution of EM Scattering for Muti-Medium Targets with Variant Permittivities

An evaluated PMCHWT is formulated in terms of the asymptotic waveform evaluation (AWE) technique to predict the scattering characteristics of multi-medium targets. At first the uncertain dielectric constant can vary within a certain range by setting it as the permittivity variable. Then the evaluate...

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Bibliographic Details
Published inIEEE antennas and wireless propagation letters pp. 1 - 5
Main Authors Luan, Yu-Zhe, Zhao, Min, He, Zi, Ding, Da-Zhi
Format Journal Article
LanguageEnglish
Published IEEE 30.01.2023
Subjects
Asymptotic Waveform Evaluation (AWE)
Dielectric constant
Electromagnetic scattering
Impedance
Interpolation
Muti-Medium
Permittivity
PMCHWT
Pseudo-spectral method
Surface impedance
Taylor series
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Summary:An evaluated PMCHWT is formulated in terms of the asymptotic waveform evaluation (AWE) technique to predict the scattering characteristics of multi-medium targets. At first the uncertain dielectric constant can vary within a certain range by setting it as the permittivity variable. Then the evaluated PMCHWT is constructed with these permittivity variables. Noted that the inversion of the impedance matrix is needed only once and the moment matching technique is used in the process of recursion. Moreover, the high-order derivatives are applied in order to obtain the greater convergence radius. Finally, the impedance matrix, right vector and the current density are expanded with the Taylor series. And the current density is approximated by the reduced order rational Padé function. Compared with the traditional perturbation method, greater radius of convergence can be obtained by using the proposed method. In addition, higher efficiency can be gotten than the general Monte Carlo (MC) method.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2023.3240985