A resonator includes a member with an embedded charge, at least one input electrode, at least one output electrode, and at least one common electrode. The input and output electrodes are spaced from and on substantially opposing sides of the member from the common electrode. At least one of the member...http://www.google.ca/patents/US20030112096?utm_source=gb-gplus-sharePatent US20030112096 - Resonator and a method of making thereof