| 一种低损耗高抑制的声表面波滤波器 |
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| 引用本文： | 赵雪梅,陆川,陈尚权,李桦林,陈华志,蒋世义,陈清华,董加和,陈彦光.一种低损耗高抑制的声表面波滤波器[J].压电与声光,2020,42(4):453-455. |
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| 作者姓名： | 赵雪梅 陆川 陈尚权 李桦林 陈华志 蒋世义 陈清华 董加和 陈彦光 |
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| 作者单位： | （1.中国电子科技集团公司第二十六研究所，重庆 400060；2.装备发展部驻重庆地区军事代表室，重庆 400060 ） |
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| 摘 要： | 该文采用周期调制及双通道设计的方法实现了一种低损耗高抑制声表面波滤波器的研制。该滤波器以64°Y X LiNbO3为基片材料，其中心频率约475 MHz，插入损耗小于2 dB，阻带抑制优于60 dB及1 dB相对带宽约5%。研制的滤波器具有低插损及高阻带抑制的特性，结果表明该设计方法具有很好的实用性。
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| 关 键 词： | 声表面波滤波器 周期调制 三换能器 |
A SAW Filter with Low Insertion Loss and High Suppression |
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| ZHAO Xuemei,LU Chuan,CHEN Shangquan,LI Hualin,CHEN Huazhi,JIANG Shiyi,CHEN Qinghu,DONG Jiahe,CHEN Yanguang.A SAW Filter with Low Insertion Loss and High Suppression[J].Piezoelectrics & Acoustooptics,2020,42(4):453-455. |
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| Authors: | ZHAO Xuemei LU Chuan CHEN Shangquan LI Hualin CHEN Huazhi JIANG Shiyi CHEN Qinghu DONG Jiahe CHEN Yanguang |
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| Affiliation: | (1.The 26th Institute of China Electronics Technology Group Corporation, Chongqing 400060,China;2.Military Representative Office of Equipment Department in Chongqing, Chongqing 400060,China) |
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| Abstract: | In this paper, a low loss and high suppression surface acoustic wave filter is developed by the methods of pitch modulated IDT and two acoustic channel designs. The filter uses 64°Y X LiNbO3 as the substrate material, its center frequency is about 475 MHz, the insertion loss is less than 2 dB, the stop band rejection is better than 60 dB and the relative bandwidth of 1 dB is about 5%. The developed filter has the characteristics of low insertion loss and high stop band rejection. The results show that the design method has good practicability. |
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| Keywords: | surface acoustic wave filter pitch modulated three IDT |
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