Observation of Surface Acoustic Wave Propagation on a Quartz Ball with Concave Proximate Electrodes
Observation of Surface Acoustic Wave Propagation on a Quartz Ball with Concave Proximate Electrodes
复制标题
表面声波在带有凹面近端电极的石英球上传播的观察
DOI：
10.1143/jjap.47.4081
复制
发表时间：
2008
影响因子：
1.5
通讯作者：
K. Yamanaka
中科院分区：
文献类型：
--
作者：
T. Yanagisawa;Kazunori Ote;T. Ohgi;N. Nakaso;K. Yamanaka
通过控制电极对石英球的接近，研究了球形表面声波（SAW）器件的往返传播特性。为了研究数字间换能器（IDT）位置与声波往返指数衰减的关系，我们在石英球赤道带（z轴圆柱体）处放置一个带IDT的凹玻璃板，发射和接收声波。在本研究中，提高了仪器的精度，结果发现，当IDT处于一定位置时，声表面波的往返频率呈指数衰减。具体位置并不总是在z轴圆柱上，而是以120°为周期的曲流带分布在z轴圆柱周围。通过在这些位置制造IDT，预计球形SAW传感器的性能和再现性将得到提高。
We evaluated the characteristics of roundtrip propagation on a ball surface acoustic wave (SAW) device by controlling the approach of electrodes to the quartz ball. In order to investigate the relationship between the interdigital transducer (IDT) position and the exponential attenuation in the roundtrips of SAW, we brought a concave glass plate with an IDT towards the equatorial belt (Z-axis cylinder) of the quartz ball, and transmitted and received a SAW. In this study, the precision of the apparatus was improved, and as a result, it was found that roundtrip of SAW attenuates exponentially when the IDT is at a certain position. The specific positions were not always at the Z-axis cylinder but distributed around it with the meander belt with a period of 120°. By fabricating an IDT at such positions, it is expected that the performance and reproducibility of ball SAW sensors will be enhanced.