Title :
Improving impedance matrix localization by a digital filtering approach
Author :
Baharav, Z. ; Leviatan, Y.
Author_Institution :
Dept. of Electr. Eng., Technion-Israel Inst. of Technol., Haifa, Israel
Abstract :
Wavelet bases have been employed recently in numerical solutions of integral equations encountered in electromagnetic scattering problems. The advantage of these bases lies in their ability to render the problem impedance matrix more localized. In this paper, we propose a digital filtering approach for integrating wavelet transforms into existing electromagnetic-scattering numerical-solvers. The suggested approach facilitates a much faster implementation of the transform. It also allows the incorporation of other ideas such as wave-packets and best-basis from the discipline of digital signal processing. A physical interpretation of the basis functions obtained by a few selected structures of digital filters is given, and their usefulness is explained. A numerical example is given for the case of TM scattering by a square cylinder.
Keywords :
digital filters; electric impedance; electromagnetic wave scattering; integral equations; signal processing; wavelet transforms; TM scattering; digital filtering; digital signal processing; electromagnetic scattering; impedance matrix localization; integral equations; numerical solutions; numerical-solvers; square cylinder; wave packets; wave-packets; wavelet bases; wavelet transform; wavelet transforms i; Digital filters; Digital signal processing; Electromagnetic scattering; Engine cylinders; Filtering; Impedance; Integral equations; Moment methods; Sparse matrices; Wavelet transforms;
Conference_Titel :
Electrical and Electronics Engineers in Israel, 1995., Eighteenth Convention of
Conference_Location :
Tel Aviv, Israel
Print_ISBN :
0-7803-2498-6
DOI :
10.1109/EEIS.1995.513782