Method of modeling electrostrictive effects and acoustic resonances in a tunable capacitor

A method of modeling electrostrictive effects and acoustic resonances in a tunable capacitor, comprising:

• dividing a BST layer of said tunable capacitor into thin layers or slices with each slice's thickness representing a small fraction of an acoustic wavelength;
• injecting at each junction between said slices, an acoustic current proportional to an electrical current through said tunable capacitor;
• adjusting empirically characteristic impedances and complex propagation constants to account for actual process variations in manufacturing of said tunable capacitor;
• adjusting empirically said characteristic impedances and complex propagation constants to account for end-effects in directions transversal to a wave direction;
• and
• wherein a real part of a vector sum of acoustic voltages at all slice junctions, divided by an electrical current vector is taken to be representative of a part of the voltage tunable capacitor's effective series resistance contributed by an electrostrictive effect and acoustic resonances.