Title :
The transfinite element method for modeling MMIC devices
Author :
Cendes, Zoltan J. ; Lee, Jin-Fa
Author_Institution :
Dept. of Electr. & Comput. Eng., Carnegie-Mellon Univ., Pittsburgh, PA, USA
Abstract :
A numerical procedure called the transfinite element-method is used in conjunction with the planar waveguide model to analyze MMIC devices. By using analytic basis functions together with finite-element approximation functions in a variational technique, the transfinite-element method determines the fields and scattering parameters for a wide variety of stripline and microstrip devices. With minor modification, the method can be applied to waveguide junctions, treating singular points in the junctions very efficiently. Calculations are shown for a rectangular-waveguide two-slot 20-dB coupler, stripline band-elimination filter, and several microstrip discontinuity problems. Good agreement of the numerical results with published values demonstrates the validity of the procedure.<>
Keywords :
MMIC; S-parameters; finite element analysis; semiconductor device models; strip line components; MMIC devices; analytic basis functions; fields; finite-element approximation functions; microstrip devices; microstrip discontinuity problems; modeling; monolithic microwave IC; numerical procedure; planar waveguide model; rectangular-waveguide; scattering parameters; stripline band-elimination filter; transfinite element method; two slot coupler; variational technique; waveguide junctions; Circuits; Electromagnetic waveguides; Frequency; MMICs; Material properties; Microstrip; Partial differential equations; Planar waveguides; Stripline; Waveguide junctions;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
