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Modeling of cascaded coplanar waveguide discontinuities by the mode-matching approach

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2 Author(s)
Schmidt, R. ; Inst. fur Hochfrequenztech., Tech. Univ. Munchen, Germany ; Russer, P.

Cascaded coplanar waveguide discontinuities with transverse dimensions of the order of some micrometers are analyzed by the mode-matching and generalized scattering matrix method. This approach permits a full-wave analysis of the electromagnetic field also in the metallic regions. Compared with full-wave analysis assuming perfect conductors and a subsequent loss computation based on the surface impedance model the accuracy is considerably enhanced. The mode-matching method is revisited in the context of a network representation of discontinuities. The implications of Tellegen's general network theorem on the mode-matching method, particularly on the testing functions, are investigated. Furthermore, the mode-matching method is related to the equivalence principle applied to discontinuities and to the continuity condition of voltage and current of quasi-TEM waves in the static approximation

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:43 ,  Issue: 12 )