Energy trapping in HBARS based on cubic and 3m crystals

In this paper, the analytic solution of the problem of acoustic energy trapping in a microwave composite resonator containing a thick cubic or 3 m crystal plate with a deposited piezoelectric film and electrodes is presented. Thus the problem of energy trapping in composite microwave HBARs is solved analytically. The important feature of the calculation of such structures for microwaves is the necessity of taking into account wave properties of piezoelectric films and electrodes because their thickness is comparable with wavelength in the material.