高频声表面波陷波器  

High Frequency SAW Notch Filter

作　　者：曹亮[1] 彭云[1] 陈小兵[1] 朱勇[1] 彭雄[1] 杨静[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》2004年第1期1-3,共3页Piezoelectrics & Acoustooptics

摘　　要：报道了817MHz声表面波陷波器的设计及结果。该陷波器采用T型带陷滤波器等效电路结构,用两个SAW单端对谐振器加简单调谐元件构成,器件尺寸为3.8mm×3.8mm,陷波深度为15dB,-3dB陷波宽度为600kHz,通带宽度大于700MHz,通带损耗为-0.735dB,通带波纹0.5dB。最后讨论了影响高频陷波器指标恶化的原因。Design method and results of 817 MHz SAW notch filter are reported in this paper. The filter utilizes T-type notch filter equivalent circuit consisting of two SAW one-pole resonators plus simple tuning component. The device has a notch depth of 15 dB; -3 dB notch width of 600 kHz with the pass band loss and ripple of (-0.735) dB and 0.5dB respectively. The dimension of the filter is 3.8 mm×3.8 mm with the pass bandwidth higher than 700 MHz.The reason for deterioration of filter performances is discussed in the end.

关 键 词：声表面波 陷波器 谐振器 

分 类 号：TN65[电子电信—电路与系统]