Affiliations: [a] School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou, Henan, China | [b] Department of Aeronautical Mechanical Engineering, The First Aeronautical College of Air Force, Xinyang, Henan, China | [c] School of Mechanical Engineering, Zhengzhou University, Zhengzhou, Henan, China | [d] Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, NE, USA
Correspondence:
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Corresponding author: Jiashi Yang, School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou, Henan 450001, China. E-mail:jyang1@unl.edu
Abstract: We studied thickness-shear vibration frequencies and
modes in a rectangular AT-cut quartz plate resonator with ring electrodes.
The electrodes are also rectangular, with their central parts missing and
thus form rectangular ring electrodes. It was found that the vibration tends
to be trapped in the electrode area and decays away from the electrode
edges. By properly designing the electrode dimensions, the vibration can be
made nearly uniform in the central part of the plate. This is particularly
suitable for resonator-based sensor applications where the sensitivity is
determined theoretically from the uniform vibration distribution of pure
thickness-shear modes in an unbounded plate.
