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
  
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
作者单位
毛世平1, 曾庆高1, 陈彦光1, 蒋世义1, 彭昱皓2 (1.中国电子科技集团公司第二十六研究所重庆 4000602.天津大学 电气自动化与信息工程学院天津 300072) 
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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〗 LiNbO3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〗 LiNbO3 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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