| 高带外抑制声表面波扇形滤波器的研制 |
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| 引用本文： | 李红浪,何世堂,梁勇. 高带外抑制声表面波扇形滤波器的研制[J]. 压电与声光, 2004, 26(5): 354-356 |
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| 作者姓名： | 李红浪 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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| 基金项目： | 中科院知识创新工程方向性项目 ( No:KGCS2 -10 2 ) |
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| 摘 要： | 根据混合场等效电路模型,详细分析了抽指加权结构对扇形又指换能滤波器频响的影响。在考虑了指间反射、三次行程以及指条寄生阻抗等情况下,根据扇形换能器的导纳矩阵及其外围电路参数得到器件总的频率响应,并通过改变发射和接收换能器指对数来改善扇形又指换能滤波器带外抑制。
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| 关 键 词： | 声表面波滤波器 等效电路 高带外抑制 |
| 文章编号： | 1004-2474(2004)05-0354-03 |
| 修稿时间： | 2003-01-07 |
Development Slanted SAW Filter with High Rejection |
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| LI Hong-lang,HE Shi-tang,LIANG Yong. Development Slanted SAW Filter with High Rejection[J]. Piezoelectrics & Acoustooptics, 2004, 26(5): 354-356 |
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| Authors: | LI Hong-lang HE Shi-tang LIANG Yong |
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| Abstract: | Based on "mixed circuit" model, the relation between the frequency response of slanted filter and transducers' withdrawal weighting is analyzed. The filter's frequency response is calculated according to it's inductance matrix and peripheral circuit. The internal reflection within IDTs, triple transit echo, parasite impedance of finger, and etc are been considered in this method. The out-of-side rejection is improved by adjusting the number of two transducers of slanted filter. |
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| Keywords: | SAW filter equivalent circuit high out-of-side rejection |
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