Vector finite element method with mixed-interpolation-type triangular-prism element for waveguide discontinuities

The mixed-interpolation-type triangular-prism element is proposed and an approach based on the finite element method (FEM) with the element is formulated for the analysis of three-dimensional discontinuity problems of electromagnetic waveguides. Here, in order to treat the infinite uniform waveguide with arbitrarily shaped cross section, the eigenmodes of the uniform waveguide are computed by using the FEM with the high-order mixed-interpolation-type triangular element, and the analytical relations in the uniform waveguide are constructed numerically. A finline discontinuity, a dielectric-loaded waveguide, and a junction between a rectangular waveguide and a circular one are analyzed, and then the validity and versatility are confirmed. >

[1]  Masanori Koshiba,et al.  Three-dimensional finite-element solution of dielectric scattering obstacles in a rectangular waveguide , 1990 .

[2]  M. S. Alam,et al.  Finite element analysis of propagating, evanescent, and complex modes in finlines , 1994 .

[3]  Masanori Koshiba,et al.  Three-dimensional finite-element method with edge elements for electromagnetic waveguide discontinuities , 1991 .

[4]  P. P. Silvester,et al.  Finite element analysis of inductive strips in unilateral finlines , 1993 .

[5]  Masanori Koshiba,et al.  A vector finite element method with the high-order mixed-interpolation-type triangular elements for optical waveguiding problems , 1994 .

[6]  T. Itoh,et al.  Characterization of shielded coplanar type transmission line junction discontinuities incorporating the finite metallization thickness effect , 1992 .

[7]  F. Arndt,et al.  Rigorous modal analysis of the asymmetric rectangular iris in circular waveguides , 1993, IEEE Microwave and Guided Wave Letters.

[8]  Fritz Arndt,et al.  Field theoretical computer-aided design of rectangular and circular iris coupled rectangular or circular waveguide cavity filters , 1993 .

[9]  Masanori Koshiba,et al.  A vector finite‐element analysis of complex modes in shielded microstrip lines , 1993 .

[10]  Nikolaos K. Uzunoglu,et al.  A rigorous analysis of a shielded microstrip asymmetric step discontinuity , 1993 .

[11]  Horng Chang,et al.  Analysis of dispersion and series gap discontinuity in shielded suspended striplines with substrate mounting grooves , 1992 .

[12]  Rainee N. Simons,et al.  Theoretical and experimental characterization of coplanar waveguide discontinuities for filter applications , 1991 .