| 声表面波梯形谐振滤波器的级间补偿 |
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| 引用本文： | 刘久玲,何世堂,梁勇.声表面波梯形谐振滤波器的级间补偿[J].应用声学,2005,24(1):1-4. |
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| 作者姓名： | 刘久玲 何世堂 梁勇 |
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| 作者单位： | 中国科学院声学研究所,北京,100080 |
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| 摘 要： | 梯形SAW滤波器在进行级联后,其通带的低端会出现下陷,使得级联后的通带特性变坏。本文从阻抗匹配的角度分析了通带低端出现下陷的原因,并采用了在级间加谐振器进行补偿的改进方法,最后给出了理论模拟及实验结果。
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| 关 键 词： | 声表面波 梯形谐振滤波器 级间补偿 |
| 修稿时间： | 2003年9月17日 |
Inter-stage compensation of ladder-type SAW resonator filter |
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| LIU Jiu-Ling,HE Shi-Tang and LIANG Yong.Inter-stage compensation of ladder-type SAW resonator filter[J].Applied Acoustics,2005,24(1):1-4. |
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| Authors: | LIU Jiu-Ling HE Shi-Tang and LIANG Yong |
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| Institution: | Institute of Acoustics, Chinese Academy of Sciences, Beijing 100080;Institute of Acoustics, Chinese Academy of Sciences, Beijing 100080;Institute of Acoustics, Chinese Academy of Sciences, Beijing 100080 |
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| Abstract: | The cascade of ladder-type SAW filter would cause a characteristic degradation in the lower side of the filter passband. On analyzing the reason of this degradation in connection with inter-stage impedance mismatching, this paper suggests the method of inter-stage compensation by adding SAW resonator to the inter-stage so as to reduce this impedance mismatching. Theoretic simulation and experimental test are given with favorable result. |
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| Keywords: | Surface acoustic wave (SAW) Ladder-type resonator filter Inter-stage compensation |
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