Mode-matching in Time Domain

Author

Legenkiy, M.N. ; Yu Zheng ; Butrym, A.Yu.

Author_Institution

Karazin Kharkiv Nat. Univ., Kharkiv

fYear

2008

fDate

15-19 Sept. 2008

Firstpage

225

Lastpage

227

Abstract

A new method for waveguide scattering problems analysis is proposed. The method is based on field mode expansion in time domain and mode-matching the fields at a scatter (iris). As an example the problem of diffraction of a pulse wave on an iris in a parallel-plate waveguide is solved and compared against FDTD solution. The main idea is in solving FDTD equations for each mode independently in the regular waveguide section and using the full-wave FDTD equations only at the iris, where mode-matching is used to relate mode amplitudes with transverse spatial field distribution. Each waveguide channel is modeled by a 1D Klein-Gordon equation, which is solved by FDTD method with a very low numerical dispersion error.

Keywords

finite difference time-domain analysis; mode matching; waveguides; 1D Klein-Gordon equation; FDTD solution; field mode expansion; iris; mode matching; parallel-plate waveguide; time domain; transverse spatial field distribution; waveguide channel; waveguide scattering problems; Diffraction; Eigenvalues and eigenfunctions; Equations; Finite difference methods; Iris; Scattering; Time domain analysis; Ultra wideband technology; Waveguide components; Waveguide junctions; FDTD; Klein-Gordon equation; Mode Basis Method; mode-matching;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrawideband and Ultrashort Impulse Signals, 2008. UWBUSIS 2008. 4th International Conference on

Conference_Location

Sevastopol

Print_ISBN

978-1-4244-2738-3

Type

conf

DOI

10.1109/UWBUS.2008.4669416

Filename

4669416