小体积高频5次泛音晶体滤波器  

Fifth-Overtone Crystal Filter with Small Size and High Frequency

作　　者：彭胜春[1] 阳皓[1] 邱泽林 李亚飞 张静雯[1] 侯京川 PENG Shengchun;YANG Hao;QIU Zelin;LI Yafei;ZHANG Jingwen;HOU Jingchuan(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》2021年第1期29-32,共4页Piezoelectrics & Acoustooptics

摘　　要：该文提出了一种小体积高频晶体滤波器的设计方法。通过采用5次泛音的设计,实现了140 MHz的工作频率,降低了生产成本,提高了器件的可靠性。同时为了实现较小的外形尺寸封装,在保证滤波器性能的情况下,对晶片尺寸和磁芯进行小尺寸设计,使其体积仅为常规晶体滤波器的一半。结果表明,该滤波器的工作频率为140 MHz,3 dB带宽为11 kHz,带内波动小于0.5 dB,阻带抑制大于50 dB。This paper presents a method to design crystal filter which has the characteristics of small size,high frequency.By adopting the fifth-overtone design,the operating frequency of 140 MHz has been realized,and the cost is reduced and the reliability of device is improved.At the same time,in order to achieve smaller package size,the chip size and magnetic core are designed in small size to ensure the performance of the filter,so that the size of the chip is only half of that of the conventional crystal filter.The results show that the working frequency of the filter is 140 MHz,the 3 dB bandwidth is 11 kHz,the in-band ripple is less than 0.5 dB,and the stop-band suppression is greater than 50 dB.

关 键 词：晶体滤波器 小体积 高频 泛音 

分 类 号：TN713[电子电信—电路与系统] TM22[一般工业技术—材料科学与工程]