Title :
Conformal mapping of the field and charge distributions in multilayered substrate CPWs
Author :
Carlsson, Erik ; Gevorgian, Spartak
Author_Institution :
Ericsson Microwave Syst. AB, Molndal, Sweden
fDate :
8/1/1999 12:00:00 AM
Abstract :
Conformal mapping (CM) and partial capacitance techniques are used for analytical evaluation of charge/current and electric- and magnetic-field distributions in a multilayered substrate coplanar waveguide (CPW) in the quasi-TEM approximation. The results, compared with finite-element method simulations, show that the magnetic wall assumed at the dielectric-dielectric interfaces in CM is a good approximation for many practical cases. The method is applied to a CPW with a thin ferroelectric film used in tunable microwave devices
Keywords :
capacitance; coplanar waveguide components; coplanar waveguides; electromagnetic shielding; ferroelectric thin films; microwave integrated circuits; charge distributions; conformal mapping; dielectric-dielectric interfaces; ferroelectric film; field distributions; magnetic wall; multilayered substrate CPWs; partial capacitance techniques; quasi-TEM approximation; tunable microwave devices; Capacitance; Conformal mapping; Coplanar waveguides; Dielectric substrates; Ferroelectric films; Finite element methods; Magnetic analysis; Microwave devices; Microwave theory and techniques; Waveguide components;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
