Ultrawideband absorbing boundary condition for termination of waveguiding structures in FD-TD simulations

Author

Reuter, Christopher E. ; Joseph, Rose M. ; Thiele, Eric T. ; Katz, Daniel S. ; Taflove, Allen

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Northwestern Univ., Evanston, IL, USA

Volume

4

Issue

10

fYear

1994

Firstpage

344

Lastpage

346

Abstract

A new method for ultrawideband termination of waveguides in finite-difference time-domain (FD-TD) grids is presented. The Berenger perfectly matched layer (PML) absorbing boundary condition is applied to terminate both perfect electrically conducting (PEC) and dielectric waveguides in two dimensions. Reflections of less than -75 dB are obtained over the entire propagation regime. Evidence is presented that the PML ABC is effective even for the evanescent energy present below cutoff in PEC waveguides and the multimode propagation present in dielectric waveguides.<>

Keywords

dielectric waveguides; finite difference time-domain analysis; waveguide theory; Berenger perfectly matched layer; FD-TD simulations; absorbing boundary condition; dielectric waveguides; evanescent energy; multimode propagation; perfect electrically conducting waveguides; reflections; two dimensions; ultrawideband termination; waveguiding structures; Boundary conditions; Dispersion; Electromagnetic propagation; Electromagnetic waveguides; Frequency; Microwave propagation; Optical propagation; Optical waveguides; Reflection; Ultra wideband technology;

fLanguage

English

Journal_Title

Microwave and Guided Wave Letters, IEEE

Publisher

ieee

ISSN

1051-8207

Type

jour

DOI

10.1109/75.324711

Filename

324711