基于36°Y-X钽酸锂的扇形声表滤波器设计与研究  

Design and Study on Fan-Shaped SAW Filter Based on 36°Y-X LiTaO_(3) Substrates

作　　者：蒋道军[1] 吴燕[1] 张显洪[1] 肖强 董加和[1] 蒋国宇[1] JIANG Daojun;WU Yan;ZHANG Xianhong;XIAO Qiang;DONG Jiahe;JIANG Guoyu(The 26th Institute of China Electronics Technology Group Corporation,Chongqing 400060,China)

机构地区：[1]中国电子科技集团公司第二十六研究所,重庆400060

出　　处：《压电与声光》2023年第5期674-676,共3页Piezoelectrics & Acoustooptics

摘　　要：该文提出了基于钽酸锂漏波材料设计的扇形声表滤波器。钽酸锂在36°Y-X切向时,其机电耦合系数(ΔV/V)为2.4%、频率温度系数(TCF)为-32×10^(-6)/℃。36°Y-X钽酸锂具有较强的压电耦合性和适中的温度稳定性,用它设计相对带宽5%~10%的滤波器可以实现较小的插入损耗和适中的温度稳定性,器件实测结果与仿真相符。The design method of fan-shaped SAW filter using leaky wave propagating on LiTaO 3 substrates is proposed in this paper.The electromechanical coupling coefficient(ΔV/V)of 36°Y-X LiTaO 3 substrates is 2.4%,and the temperature coefficient of frequency(TCF)is-32×10^(-6)/℃.The 36°Y-X LiTaO 3 has strong piezoelectric coupling characteristic and moderate temperature stability,based on it,the designed SAW filter with 5%~10%fractional bandwidth can achieve less insertion loss and moderate temperature stability.The measured results of fabricated device are consistent with the simulated ones.

关 键 词：扇形声表滤波器 漏波材料 36°Y-X钽酸锂 插入损耗 温度稳定性 

分 类 号：TN65[电子电信—电路与系统] TN713