8E-1 A Technique for P-Matrix Computation by Periodic FEM/BEM Analysis

Author

Fukuura, Atsuomi ; Kawaguchi, Masaya

Author_Institution

Kyocera Corp., Kyoto

fYear

2007

fDate

28-31 Oct. 2007

Firstpage

694

Lastpage

697

Abstract

An extension of the periodic FEM/BEM analysis technique is proposed and its application to P-matrix computation for periodic grating structures is described. Conventional BEM is extended to include waves propagating in opposite directions. The FEM part is extended to include power flow through the periodic boundaries, where the fields are expressed as linear combinations of known propagating modes. The modes for the given device structure can be calculated by the conventional FEM/BEM analysis. The action integral for the FEM is given in which the displacement and the electrostatic potential are treated as complex fields. It is shown, based on Noether´s theorem, that the power flow through the boundaries derived from the given action integral is described by surface integral of the Poynting vector. P-matrix elements can be obtained as part of solutions for the combined FEM/BEM equations.

Keywords

acoustic wave propagation; boundary-elements methods; diffraction gratings; finite element analysis; matrix algebra; surface acoustic wave devices; vectors; Noether´s theorem; P-matrix computation; Poynting vector; SAW device analysis; acoustic wave propagation; action integrals; conventional FEM-BEM analysis; electrostatic potential; periodic FEM-BEM analysis; periodic boundaries; periodic grating structures; power flow; surface integrals; Computational efficiency; Computer applications; Electrostatics; Gratings; Green function; Integral equations; Load flow; Research and development; Stress; Surface acoustic wave devices;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 2007. IEEE

Conference_Location

New York, NY

ISSN

1051-0117

Print_ISBN

978-1-4244-1384-3

Electronic_ISBN

1051-0117

Type

conf

DOI

10.1109/ULTSYM.2007.179

Filename

4409752