Piezoelectric resonator having combined thickness and width vibrational modes

摘要

A method and apparatus for a piezoelectric resonator having combined thickness and width vibrational modes are disclosed. A piezoelectric resonator may include a piezoelectric substrate and a first electrode coupled to a first surface of the piezoelectric substrate. The piezoelectric resonator may further include a second electrode coupled to a second surface of the piezoelectric substrate, where the first surface and the second surface are substantially parallel and define a thickness dimension of the piezoelectric substrate. Furthermore, the thickness dimension and the width dimension of the piezoelectric substrate are configured to produce a resonance from a coherent combination of a thickness vibrational mode and a width vibrational mode when an excitation signal is applied to the electrodes.

主权项

1. A piezoelectric resonator, comprising:
a piezoelectric; substrate forming a plurality of sub-resonators; a plurality of first electrodes coupled to a first surface of the piezoelectric substrate, wherein each of the plurality of sub-resonators has a corresponding one of the plurality of first electrodes; and a plurality of second electrodes coupled to a second surface of the piezoelectric substrate, wherein the each of the plurality of sub-resonators has a corresponding one of the plurality of second electrodes, wherein the first surface and the second surface are substantially parallel and define a thickness dimension of the piezoelectric substrate, wherein the each of the plurality of sub-resonators is defined by a width dimension, wherein the piezoelectric substrate is configured to produce a resonance from a coherent combination of a thickness vibrational mode and a width vibrational mode when an excitation signal is applied to a first set of electrodes selected from at least one of the plurality of first electrodes or the plurality of second electrodes, wherein a second set of electrodes selected from the at least one of the plurality of first electrodes or the plurality of second electrodes is set to ground, each electrode of the second set of electrodes diagonally opposed to another electrode of the second set of electrodes, and wherein a ratio of the thickness dimension to the width dimension lies within a range between 0.75 and 1.25.