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Full‐wave analysis of single cylindrical striplines and microstriplines with multilayer dielectrics
Author(s) -
Bouttout Farid,
Lethimonnier Franck,
Bihan Denis Le
Publication year - 2006
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/nme.1722
Subject(s) - microstrip , method of moments (probability theory) , stripline , mathematical analysis , characteristic impedance , integral equation , transmission line , dielectric , electrical impedance , strips , electric power transmission , mathematics , green's function , physics , function (biology) , optics , engineering , electrical engineering , algorithm , statistics , estimator , evolutionary biology , biology
In this paper, the spectral‐domain method is used to calculate the propagation characteristics of cylindrical microstrip transmission lines. The problem is formulated using an electric field integral equation and the spectral‐domain Green's function. The solutions of the field components are obtained in matrix forms, which facilitate the calculations of the Green's function and the power flowing over the lines. The Green's functions are obtained in terms of transition matrices over the dielectric layers. The obtained integral equation is solved by moment method using four kinds of basis functions. The convergence of the method is proven. Based on the power–current definition, a stationary expression for the characteristic impedance has been derived analytically. Numerical results of the effective dielectric constant and the characteristic impedance for various line parameters are calculated and analysed. The computed data are found to be in good agreement with results obtained using other methods. The formulation is then applied to covered microstripline, microstripline and stripline with air gaps, for which data are not found in the literature to date. The presented method is used to guide design of microstrip coil for magnetic resonance imaging. This method is also suitable for investigation of multiconductor strip lines. Copyright © 2006 John Wiley & Sons, Ltd.