Title :
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
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;
Conference_Titel :
Microwave Symposium Digest, 1996., IEEE MTT-S International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-3246-6
DOI :
10.1109/MWSYM.1996.511003
