APPLICATION OF THE IMPEDANCE TRANSFORMATION ON TRANSMISSION-LINES TO ELECTROCHEMICAL MICROBALANCE

The purpose of this paper is to propose an analysis of stacked mechani cal resonator designs in terms of microwave network approach. The appl ication to electrochemical quartz crystal microbalance (EQCM) is achie ved where we have priviliged the fundamental impedance transformation equation on transmission line relating the impedance at any point of t he line to that at an other point of the line. From this systematic pr ocedure applied to a quartz crystal with simultaneous mass loading and liquid loading we have derived the impedance expression and the near- series-resonance characteristics of the loaded crystal resonator by me ans of a multilayer model. The effect of thickness of a mass layer and of a contacting Newtonian liquid on real and imaginary parts of imped ance is predicted for several deposited materials. A lumped equivalent circuit is obtained from this formulation and the proposed results ar e compared with recently published experiments. The analysis presented in the familiar context of distributed circuit theory make the formul ation and the physical interpretation of various scattering problems e asier.