Anew C-FDFD method capturing per-unit length parameter of quasi-TEM mode transmission line with reduced computational resource

Through this paper, authors will propose a new C-FDFD (compact finite-difference frequency-domain) method, which can reduce the size of computational matrix by using a new matrix formulation and quasi-TEM approximation. Generally, the decreased matrix size reduces the computational time and required memory size. When the number of numerical grids in x-and y-axis, which are employed for modeling transverse cross-section of waveguide or transmission line whose longitudinal direction is parallel to z-axis, is N
_x
and N
_y
, respectively, the computational matrix size required by the recent work previously presenting C-FDFD is (2N
_x
N
_y
) × (2N
_x
N
_y
). Although several papers have presented computationally efficient solutions for C-FDFD determining the dispersion characteristics of guided wave structures, authors have recently developed a new way to significantly reduce the computational matrix size. A new matrix formulation for newly proposed C-FDFD will be presented, based on which the required matrix size to be computed can be reduced by (2N
_y
) × (2N
_y
).