| 低插损极窄带声表面波滤波器设计 |
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| 引用本文： | 邓盛刚 贝伟斌. 低插损极窄带声表面波滤波器设计[J]. 压电与声光, 1996, 18(1): 6-9 |
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| 作者姓名： | 邓盛刚 贝伟斌 |
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| 作者单位： | 四川大学无线电系，德清电子器材厂 |
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| 摘 要： | 利用集总参数等效电路模型计算了声表面波双模耦合谐振滤波器的频响．通过改变谐振器各个参量使滤波器指标满足要求．在ＳＴ石英基片上成功研制出中心频率２２８ＭＨｚ，△ｆ－３ｄＢ＝１５０ｋＨｚ，插损为３ｄＢ，阻带抑制小于－５０ｄＢ的铁路专用寻呼机用滤波器。理论计算与实验结果一致。
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| 关 键 词： | 双模谐振滤波器，等效电路模型，低插入损耗，寻呼机 |
^Design of SAW Filter with Low insertion Loss and Very Narrow Bandwidth |
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| Deng Chenggang,Liu Jiaben. ^Design of SAW Filter with Low insertion Loss and Very Narrow Bandwidth[J]. Piezoelectrics & Acoustooptics, 1996, 18(1): 6-9 |
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| Authors: | Deng Chenggang Liu Jiaben |
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| Abstract: | in this paper,the frequency response of SAW filter with double-mode resonator iscalculated from lumped equivalent circuit model.The required specification of the filter is obtainedthrough changing each parameter of the resonator. The SAW filter for special pager used on railway is designed successfully on ST-quartz substrate. The characteristics of the filter include centerfrequency of 228 MHz,3 dB bandwidth of 150 MHz,insertion loss of less than 3 dB and the outband rejection of- 50 dB. The experimental results are in agreement with theoretical values. |
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| Keywords: | double-mode resonator filter equivalent circuit model low insertion loss pager |
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