高可靠性、高基频及小延时晶体滤波器  

High Reliability and High Fundamental Frequency Small Group Delay Crystal Filter

作　　者：彭胜春[1] 阳皓[1] 周哲[1] 杨莉[1] 

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》2015年第3期365-367,372,共4页Piezoelectrics & Acoustooptics

摘　　要：研究了一种高可靠性,高基频及小延时晶体滤波器的设计方法。采用减少晶体元件和在滤波器的幅频曲线上引入衰耗峰的方法,同时实现了滤波器的小延时和小矩形系数等指标。为了保证滤波器的高可靠性,采用离子刻蚀工艺加工了高基频晶体谐振器,并对磁芯采用充磁处理,实现了滤波器的全密封结构。该滤波器的工作频率为70 MHz,3dB带宽为151.4kHz,带内波动小于0.5dB,通带内（69.95--70.05 MHz）的群延时波动小于3μs,矩形系数小于2.8。This paper presents a method to design a crystal filter which has the characteristics of high reliability, high fundamental frequency and small group delay In order to realize a small group delay and a small rectangular coefficient at the same time, a method to control the attenuation peak using fewer components than usual filter was adopted. Meanwhile, in order to achieve a high reliability, and ion etching technology was used to manufacture a high fundamental frequency crystal resonator. Magnetizing treatment was used to realize the completely sealed construction of the filter. The operation frequency of the filter was 70 MHz, 3 dB width-band was 151.4 kHz, the ripple in the pass band was less than 0.5 dB, the group delay was less than 3 bts between the frequency of 69.95 MHz and 70. 05 MHz, the rectangular coefficient was less than 2.8.

关 键 词：晶体滤波器 高可靠性 基频 小延时 离子刻蚀 

分 类 号：TN713[电子电信—电路与系统]