多层微结构声表面波温补滤波器仿真设计
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Design and Simulation of Temperature Compensated SAW Filter Based on Multi-ayers Micro-tructure
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    摘要:

    声表面波滤波器(SAWF)工作频率在宽温度范围内高度稳定是电子系统频谱控制的关键。已成为当前SAWF发展的主要技术方向。该文提出了基于多层微结构压电材料的的SAWF温度补偿技术方案,实现了基于钽酸锂(LT)压电基片上的温度补偿SAWF设计、仿真,并获得了满意的实验结果。基于LT/Si复合片法实现的SAWF频率温度系数在全温范围(-55~+85 ℃)内达到25×10-6/℃;基于SiO2/LT薄膜补偿法实现的SAWF频率温度系数在全温范围(-55~+85 ℃)内小于10×10-6/℃。研制的温度补偿声表面波滤波器(TC-AWF)达到要求,已在系统中得到应用。

    Abstract:

    The high stability of the operating frequency of SAW filter during a wide range of temperature is the key factor of spectrum controlling in the electronic system. The temperature compensated technology has become the main technical direction of the current SAW filter development. A temperature compensated SAW filter technological scheme based on multi-layer micro-structure piezoelectric material was presented in this paper. The design and simulation of temperature compensated SAW filter based on lithium tantalite (LT) piezoelectric substrate were realized and satisfied results were obtained. The temperature coefficient of frequency (TCF) of SAW filter, which was based on a overlapping of LT on Si wafer, is up to 25×10-6/℃ during the full temperature range (-55 ℃ to +85 ℃). The temperature coefficient of frequency (TCF) of SAW filter based on SiO2/LT temperature compensated method is less than 10×10-6/℃. The developed temperature compensated SAW filters (TC-SAWFs) have been applied to the systems.

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刘晓智, 董加和.多层微结构声表面波温补滤波器仿真设计[J].压电与声光,2017,39(3):408-412. LIU Xiaozhi, DONG Jiahe. Design and Simulation of Temperature Compensated SAW Filter Based on Multi-ayers Micro-tructure[J]. PIEZOELECTRICS AND ACOUSTOOPTICS

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  • 在线发布日期: 2017-06-13
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