Abstract
In the present study, piezoelectric resonators under lateral field excitation (LFE) based on a LiTaO3 single crystal are modeled and analyzed. An electrically forced vibration study is employed to acquire the motional capacitance curve and vibration mode shapes. A finite element approach is utilized to investigate the influences of some basic parameters, such as the electrode/plate mass ratio, electrode gap, and electrode width on resonance characteristics. In addition, the design criteria for the gap and width of the electrode of the LiTaO3 LFE resonators are obtained by analyzing the effects of those parameters on vibration strain distributions. The obtained results are essential for designing LFE piezoelectric resonators by using a LiTaO3 single crystal.
Highlights
Piezoelectric crystal resonators have been extensively employed for frequency production and control, telecommunication, and sensing [1,2,3,4,5,6,7]
The piezoelectric resonator based on a LiTaO3 single crystal stimulated via the lateral electric field is modeled and analyzed
The TSh vibrations could be trapped in the area with the electrode
Summary
Piezoelectric crystal resonators have been extensively employed for frequency production and control, telecommunication, and sensing [1,2,3,4,5,6,7]. Lateral field excitation (LFE)-based piezoelectric crystal resonators, adopting two electrodes on a surface of the piezoelectric substrate, are known as useful sensing tools with a number of advantages. The LFE devices employing a LiTaO3 single crystal can obtain a higher sensitivity to electrical properties because of the higher piezoelectric coupling coefficients. A pair of non-realistic side electrodes at the edges of thin crystal plates were employed in [18] to generate the lateral electric field. Crystals 2020, 10, 525 electrodes at the edges of thin crystal plates were employed in [18] to generate the lateral electric field. Addition,bythe influences of size factors of the are more complex, due to the lateral electrical fields In generated surface electrodes and the stronger crystal plate coupling. The design criteria for the gap and width of the electrodes are obtained
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