Title :
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
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;
Conference_Titel :
Microwave Symposium Digest, 2005 IEEE MTT-S International
Print_ISBN :
0-7803-8845-3
DOI :
10.1109/MWSYM.2005.1516957
