Experimental and theoretical analysis of SAW properties of the langasite substrate with Euler angle (0/spl deg/,140/spl deg/,/spl phi/)
Experimental and theoretical analysis of SAW properties of the langasite substrate with Euler angle (0/spl deg/,140/spl deg/,/spl phi/)
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DOI：
10.1109/ultsym.1999.849392
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发表时间：
1999-10
期刊：
影响因子：
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通讯作者：
A. Bungo;C. Jian;K. Yamaguchi;Y. Sawada;R. Kimura;S. Uda
中科院分区：
文献类型：
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作者：
A. Bungo;C. Jian;K. Yamaguchi;Y. Sawada;R. Kimura;S. Uda
使用新材料常数的数值计算与欧拉角（0°，140°，φ）的硅锰矿基底上与温度相关的声表面波特性的实验结果非常吻合。还通过实验研究了与温度相关的 SAW 特性与 IDT 金属厚度的关系。据透露，较厚的金属会导致较低的周转温度。此外，我们还通过实验研究了具有欧拉角（0°、140°、25°）的硅酸镁石的NSPUDT（天然单相单向换能器）特性。其方向性几乎等于基于模式耦合（COM）模型计算得出的方向性。这种 NSPUDT 特性对于低损耗 IF 滤波器来说是一个很有前途的特性。
The numerical calculations using new material constants were in good agreement with the experimental results of the temperature-related SAW properties on the langasite substrate with Euler angle (0°,140°,φ). The temperature-related SAW properties as a function of the IDT metal thickness were also experimentally investigated. It was revealed that a thicker metal leads to a lower turnover temperature. Furthermore we investigated the NSPUDT (natural single phase unidirectional transducer) properties of langasite with Euler angle (0°,140°,25°) experimentally. Its directivity was almost equal to one estimated by the calculation based on the coupling of mode (COM) model. This NSPUDT property is a promising feature for the low-loss IF filter.