Open AccessEfficient Wide‐Band Analysis for 3‐D Inhomogeneous Dielectric Objects Using Best Uniform Rational Approximation
Author(s) -
Zhao Bo,
Gong Shuxi,
Wang Xing,
Ma Ji,
Dong Hailin
Publication year - 2015
Publication title -
chinese journal of electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.267
H-Index - 25
eISSN - 2075-5597
pISSN - 1022-4653
DOI - 10.1049/cje.2015.07.030
Subject(s) - chebyshev filter , chebyshev polynomials , approximation theory , method of moments (probability theory) , dielectric , rational function , frequency band , mathematics , radar cross section , minimax approximation algorithm , basis function , polynomial , mathematical analysis , radar , algorithm , computer science , bandwidth (computing) , physics , telecommunications , quantum mechanics , statistics , estimator
An efficient hybrid method that combines the best uniform rational approximation with the Method of moments (MoM) based on the Volume integral equation (VIE) is presented for Radar cross section (RCS) prediction of inhomogeneous dielectric objects. Over the broad frequency band, the Chebyshev nodes are chosen. At these frequency sample points, the corresponding VIEs are built and the MoM is applied to solve the VIEs by using the SWG basis function. The Chebyshev polynomial expansionis employed to approximate the volume currents in the desired frequency band. The Maehly rational approximation is implemented to improve the solution accuracy. Numerical results testify the efficiency and accuracy of the proposed method and time cost ratio is analyzed finally.