| 毛世平1，
曾庆高1，
陈彦光1，
蒋世义1，
彭昱皓2.高阻带抑制宽带低损耗声表面波滤波器研究[J].压电与声光,2018,40(3):337-339.MAO Shiping1，
ZENG Qinggao1,
CHEN Yanguang1，
JIANG Shiyi1，
PENG Yuhao2.Study on Broadband and Low Loss SAW Filter With High Stop band Rejection[J].PIEZOELECTRICS AND ACOUSTOOPTICS |
| 高阻带抑制宽带低损耗声表面波滤波器研究 |
| Study on Broadband and Low Loss SAW Filter With High Stop band Rejection |
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| DOI：10.11977/j.issn.1004-2474.2018.03.008 |
| 中文关键词: 大带宽 声表面波滤波器 五换能器 谐振器 |
| 英文关键词:wide bandwidth surface acoustic wave filter five IDT resonator |
| 基金项目:国家科技部重点研发计划项目资助 |
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| 摘要点击次数: 194 |
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| 中文摘要: |
| 基于分布间隙纵向耦合五换能器结构，加入谐振器单元，采用41°〖WTBX〗Y X〖WTBZ〗 LiNbO3基片材料，通过优化设计，研制出中心频率232 MHz，3 dB带宽23.2 MHz的声表面波滤波器。该产品的插入损耗为-1.9 dB，相对带宽达到10%，矩形系数2.2，阻带抑制大于50 dB，产品综合性能指标优异，有很好的实用性。 |
| 英文摘要: |
| Based on the distributed gap and longitudinally coupled five transducer structure, adding into the resonator element and optimizing the design, a SAW filter with center frequency of 232 MHz and 3 dB bandwidth of 23.2 MHz has been developed by using 41°〖WTBX〗Y X〖WTBZ〗 LiNbO3 piezoelectric material as the substrate. The product has the features of insertion loss of -1.9 dB, relative bandwidth of 10%, and shape factor of about 2.2 and stop band rejection of 50 dB. The comprehensive performance specification of the product is excellent and has good practicability. |
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