Hybrid FDTD simulations of rib-waveguides

Author

Lauer, A. ; Bahr, A. ; Wolff, I.

Author_Institution

Fachgebiet Allgemeine und Theoretische Elektrotechnik, Gerhard Mercator Univ., Duisburg, Germany

Volume

2

fYear

1996

fDate

17-21 June 1996

Firstpage

589

Abstract

Finite Difference Time Domain simulations of rib-waveguides on GaAs substrate are performed using a real-number hybrid (Yee/discrete-wave-equation) scheme in two dimensions. Local grid refinements are derived using equivalent circuit modifications. Discrete formulas are written using shift-operators, which make them short and easy to use. Results are compared to those obtained using the well-known effective-refractive index (ERI) approximation. FDTD results show excellent agreement with the approximative formula, which is given in an explicit form. The refinements work well for low frequencies to determine cutoff-frequencies.

Keywords

equivalent circuits; finite difference time-domain analysis; rib waveguides; waveguide theory; GaAs; GaAs substrate; Yee algorithm; cutoff frequency; discrete wave equation; effective refractive index approximation; equivalent circuit; hybrid FDTD simulation; local grid refinement; rib waveguide; shift operator; two dimensional real-number method; Circuit analysis; Computational modeling; Computer simulation; Equivalent circuits; Finite difference methods; Frequency; Microwave Theory and Techniques Society; Satellite communication; Time domain analysis; Writing;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1996., IEEE MTT-S International

Conference_Location

San Francisco, CA, USA

ISSN

0149-645X

Print_ISBN

0-7803-3246-6

Type

conf

DOI

10.1109/MWSYM.1996.511003

Filename

511003