Performance improvement of RF acoustic wave resonators using phononic crystals

This work presents the merits of deploying phononic crystal on the gap between the busbar and active region of laterally excited bulk acoustic wave resonators. The results obtained from the proposed technique are compared with the conventional edge resonators and broadband piston mode resonators. It is observed that the deployed phononic crystal array plate lends itself to suppressing transverse modes and improves the Q- factor by preventing side leakage of acoustic energy.