四极点LGS晶体滤波器的研制  

Development of a 4-pole LGS Crystal Filter

作　　者：陈湘渝[1] 彭胜春[1] 周哲[1] 

机构地区：[1]四川压电与声光技术研究所,重庆400060

出　　处：《压电与声光》2010年第2期240-242,共3页Piezoelectrics & Acoustooptics

摘　　要：介绍了了一种四极点单片式硅酸鎵镧(La3Ga5SiO14,LGS)晶体滤波器的设计方法。该滤波器中心频率为5 MHz,3 dB带宽20 kHz,工作温度范围为-55^+125℃,体积只有32.0 mm×16.0 mm×8.5 mm。实验证明,LGS晶体能实现相对带宽为0.3%~0.8%,频率温度稳定性好,体积小的晶体滤波器,具有广泛的应用价值。The design method of a 4-pole LGS monolithic crystal filters（MCF） has been introduced in this paper. The filter features a center frequency of 5 MHz,3 dB band width is 20 kHz. The total volume of a2.0 mm× 16.0 mm×8.5 mm,and the operation temperature range of --55 ℃ ＋ 125 ℃ have been achieved. It presents from our experiment that LGS crystal is available for implementing filters with relative bandwidth from 0. 3% to 0.8%, better thermal stabilities and smaller size and will have a widen application.

关 键 词：单片晶体滤波器 硅酸镓镧(LGS) 频率温度特性 机电耦合系数 

分 类 号：TN713[电子电信—电路与系统]