単一モード振動子

（圧電振動解析による電極に対する周波数特性）

抄録

In order to confirm the relationship between the electrode shape and the excitation vibration mode of the quartz crystal of the acoustic wave device, the main vibration was conventionally in thickness mode, but the sliding mode in the X direction of the crystal axis is the main vibration, and the secondary oscillation in the Z direction is controlled. The electrode shape is rectangular and the mode shape (fundamental mode distribution of the waveguide due to the difference in elastic wave velocity in the Z direction). The difference between the rectangular electrode and the mode electrode was clarified from the resulting frequency characteristics. In other words, in the case of a rectangular electrode, the main vibration in the X direction was in the case of the mode shape, the other sub-oscillations were suppressed. In other words, a waveguide extending in the X direction was formed, and the vibration mode, which is a secondary vibration excited in the Z direction, was determined by the electrode shape. This data is the basis for series expansion and multimode transmission using waveguides.