| 基于有限长FEM/BEM提取COM参量 |
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| 引用本文： | 苏波,王为标,王昊,水永安,吴浩东.基于有限长FEM/BEM提取COM参量[J].压电与声光,2014,36(2):167-170. |
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| 作者姓名： | 苏波 王为标 王昊 水永安 吴浩东 |
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| 作者单位： | (1. 南京大学声学研究所 近代声学教育部重点实验室, 江苏 南京 210093;;2. 南京电子器件研究所 江苏省新型传感材料及器件工程技术研究中心, 江苏 南京 210016) |
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| 基金项目： | 国家自然科学基金资助项目（11174143） |
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| 摘 要： | 介绍了一种理论提取耦合模式模型(COM)参量的方法。利用有限长有限法/边界元法(FEM/BEM)计算声表面波同步单端对谐振器的导纳曲线,根据导纳曲线与表面波色散特性相关的特征量,通过解析计算、单变量拟合、再次单变量拟合及两变量拟合4个步骤依次提取出全部COM参量。与传统方法相比,该方法简单、稳定、可靠。根据得到的COM参量对一种混合结构的滤波器进行了模拟,与直接使用FEM/BEM得到的结果符合较好,验证了所提取的COM参量的准确性。
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| 关 键 词： | 声表面波 有限法/边界元法(FEM/BEM) 表面波色散关系 导纳曲线 耦合模式模型(COM)参量 |
COM Parameters Extraction Based on Finite FEM/BEM |
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| SU Bo,WANG Weibiao,WANG Hao,SHUI Yongan and WU Haodong.COM Parameters Extraction Based on Finite FEM/BEM[J].Piezoelectrics & Acoustooptics,2014,36(2):167-170. |
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| Authors: | SU Bo WANG Weibiao WANG Hao SHUI Yongan and WU Haodong |
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| Institution: | (1. Institute of Acoustics, Key Lab. of Modern Acoustics (MoE), Nanjing University, Nanjing 210093,China;;2. Nanjing Electronic Devices Institute, Jiangsu Engineering Research Center for Sensing Materials and Devices,Nanjing 210016,China) |
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| Abstract: | A theoretical method of getting COM parameters is presented. The admittance curve of a one port synchronous SAW resonator is calculated using finite FEM/BEM, according to the characteristics of SAW dispersion, which is used to extract all the COM parameters through four steps:Algebraic analysis;Univariate function optimization;Univariate function optimization once again;Multivariate function optimization. Comparing with traditional methods, this approach is convenient, stable and reliable. The simulation of a hybrid SAW filter using the obtained COM parameters is consistent with the result directly calculated by FEM/BEM, which verifies the accuracy of COM parameters by our method. |
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| Keywords: | SAW finite FEM/BEM characteristics of SAW dispersion admittance curve COM parameters |
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