| 基于纵向耦合结构的宽带声表面波滤波器设计 |
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| 引用本文： | 蒋世义,张幸,陈彦光,蒋欣,董加和.基于纵向耦合结构的宽带声表面波滤波器设计[J].压电与声光,2013,35(3):315-317. |
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| 作者姓名： | 蒋世义 张幸 陈彦光 蒋欣 董加和 |
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| 作者单位： | 中国电子科技集团公司第26研究所，重庆 400060 |
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| 摘 要： | 基于纵向耦合五换能器结构，采用41°-YX-LiNbO3基片材料，通过优化设计，研制出中心频率232 MHz，3 dB带宽23.5 MHz的声表面波滤波器。该产品的插入损耗-3 dB，相对带宽达到10.1%，矩形系数小于2.5，阻带抑制大于40 dB，产品综合性能指标优异，有很好的实用性。
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| 关 键 词： | 大带宽 声表面波滤波器 五换能器 |
Design of Wide band Surface Acoustic Wave Filter Based on Longitudinal Coupling Structure |
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| Affiliation: | 26th Institute of China Electronics Technology Group Corporation,Chongqing 400060,China |
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| Abstract: | Based on a five IDT with longitudinal coupling structure, a SAW filter with centre frequency of 232 MHz and 3 dB bandwidth of 23.5 MHz has been developed on 41°-YX-LiNbO3 substrate by optimizing the design technique. The developed filter has the features of insertion loss of -3 dB, fractional bandwidth of 10.1%, and shape factor of less than 2.5 and the out of band rejection of more than 40 dB. The production has excellent specifications and practicality. |
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| Keywords: | wide bandwidth surface acoustic wave filter five IDT |
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