scholarly journals SOLUTION OF WIDEBAND SCATTERING PROBLEMS USING HIERARCHICAL ULTRA-WIDEBAND CHARACTERISTIC BASIS FUNCTIONS

2019 ◽  
Vol 78 ◽  
pp. 125-133
Author(s):  
Wen-Yan Nie ◽  
Zhong-Gen Wang
Keyword(s):  
Basis Functions ◽  
Ultra Wideband ◽  
Scattering Problems

Ultra-wideband characteristic basis function method merging the secondary level characteristic basis functions for rapid computation of wideband radar cross section problems from conducting targets

2020 ◽  
pp. 1-10
Author(s):  
Zhong-Gen Wang ◽  
Jun-Wen Mu ◽  
Wen-Yan Nie
Keyword(s):  
Basis Function ◽  
Function Method ◽  
Secondary Level ◽  
Singular Value ◽  
Basis Functions ◽  
Ultra Wideband ◽  
Scattering Problems ◽  
Wideband Radar ◽  
Value Decomposition ◽  
A Current

In this paper, a merged ultra-wideband characteristic basis function method (MUCBFM) is presented for high-precision analysis of wideband scattering problems. Unlike existing singular value decomposition (SVD) enhanced improved ultra-wideband characteristic basis function method (SVD-IUCBFM), the MUCBFM reduces the number of characteristic basis functions (CBFs) necessary to express a current distribution. This reduction is achieved by combining primary CBFs (PCBFs) with the secondary level CBFs (SCBFs) to form a single merged ultra-wideband characteristic basis function (MUCBF). As the MUCBF incorporates the effects of PCBFs and SCBFs, the accuracy does not change significantly compared to that obtained by the SVD-IUCBFM. Furthermore, the efficiencies of constructing the CBFs and filling the reduced matrix are improved. Numerical examples verify and demonstrate that the proposed method is credible both in terms of accuracy and efficiency.

scholarly journals Applying Loop-Flower Basis Functions to Analyze Electromagnetic Scattering Problems of PEC Scatterers

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Gaobiao Xiao
Keyword(s):  
Integral Equations ◽  
Electromagnetic Scattering ◽  
Basis Functions ◽  
Surface Integral ◽  
Scattering Problems ◽  
Low Frequencies ◽  
Electrically Conducting ◽  
Surface Integral Equations

This paper discusses the application of loop-flower basis functions for solving surface integral equations involved in electromagnetic scattering problems on perfectly electrically conducting surfaces. Flower-shaped basis functions are proposed to replace the conventional star basis functions. The flower basis functions are defined based on mesh nodes instead of surface triangles. It is shown that the loop-flower basis functions not only can be used to handle the electromagnetic scattering problems at very low frequencies, but also can be directly used to implement Calderon preconditioners for EFIEs.

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