Analytic approximations for multilayer substrate coplanar-plate capacitors

Author

Gevorgian, S. ; Abadei, S.

Author_Institution

Dept. of Microtechnology & Nanoscience, Chalmers Univ. of Technol., Gothenburg, Sweden

fYear

2005

fDate

12-17 June 2005

Abstract

Closed form analytic approximations are proposed for complex impedance (capacitance and Q-factor) of capacitors formed by two coplanar rectangular conducting patches sandwiched between dielectric layers. The computations using proposed formulas are at least an order of magnitude faster in comparison with the commercially available software´s, and can be used in optimisation procedures. The formulas are reversible, i.e. from measured impedance one can compute permittivity and losses of one of the dielectric layers.

Keywords

Q-factor; approximation theory; capacitance; conformal mapping; coplanar waveguides; dielectric materials; multilayers; rectangular waveguides; Q-factor; capacitance; closed form analytic approximations; conformal mapping; coplanar rectangular conducting patches; dielectric layers; multilayer substrate coplanar-plate capacitors; Capacitance; Capacitors; Dielectric loss measurement; Dielectric measurements; Dielectric substrates; Impedance measurement; Loss measurement; Nonhomogeneous media; Permittivity measurement; Q factor;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2005 IEEE MTT-S International

ISSN

01490-645X

Print_ISBN

0-7803-8845-3

Type

conf

DOI

10.1109/MWSYM.2005.1516957

Filename

1516957