| Summary: | 碩士 === 國立臺灣科技大學 === 工程技術研究所 === 81 === A new quasistatic and fullwave analysis of microstrip line
structures with multidielectric layers is presented,using a
hybrid approach that combined the finite-element method and the
conformal-mapping technique. In this hybrid approach,the
Wheeler's mapping function is firstly adopted to transform the
half-infinite original domain into a finite image domain and to
overcome both the problems of infinite field extension and the
field singularity difficuty around the conductor edges.Then,the
integral formula for the quasistatic analysis is derivved from
the Laplace's equation in a way similar to that of weighted
residual method in the finite-element analysis,while the
variational formula for the fullwave analysis is derived from
the Maxwell equation and then obtained from variational
reaction theory. In the final part of this approach,numerical
results for effective dielectric constants,characteristic
impedances,charge distributions,current distributions and
dispersion conditions for various multilayer microstrip lines
structures are presented and discussed. Comparsions of the
present results with the available quasistatic and fullwave
ones are made,and good agreements are obtained.
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