Abstract
A novel method, the finite-element method (FEM) using Fourier series as the interpolating function, is presented in this paper for calculating the quasi-static characteristics of coupled cylindrical striplines and microstrip lines filled with multilayered dielectrics. This method is very similar to the normal FEM, but has a much lower-order matrix equation, smaller computational contents, and higher accuracy. It is simpler and more flexible for application than the conformal transformation method. Compared with the integral-equation and spectral-domain methods, this new method is more obvious with regard to its physics and, also, it is not involved in the difficult task of selecting the base functions and relative convergence. The numerical results shown here for several examples are in good agreement with those in the references. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 47: 265–270, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21143
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