Patent 7719388 was granted and assigned to Epcos Ag on May, 2010 by the United States Patent and Trademark Office.
Disclosed is a resonator that is mounted on a substrate, operates with acoustic bulk waves, and is disposed above an acoustic mirror. According to the invention, the basic mode of the acoustic bulk wave that can be generated in the resonator is suppressed while a higher mode can be excited in parallel and be utilized for the resonator by adjusting the acoustic mirror.