中等带宽晶体滤波器的设计

摘要

Design, based on the medium bandwidth filter pass band width and related factors were analyzed , and the crystal resonator and transformer and other related parameters design. Using medium bandwidth filter circuit , and through the crystal resonator dynamic inductance, resistance and Q value of the transformer Q value and parallel LC tuned circuit temperature characteristic is analyzed, the wide passband, small passband fluctuation, high stopband attenuation crystal filter, and gives the examples in this paper, the realization method of the filter. Through comparing test results and design technical indicators , that the scheme can satisfy the technical requirements of product design.%基于中等带宽滤波器设计中，通带宽度等相关因素进行分析，涉及晶体谐振器和变量器等相关参数设计。采用中等带宽滤波器电路，通过对晶体谐振器的动态电感、电阻、Q值，变量器Q值和并联LC调谐回路温度特性进行分析，得到了宽通带、小通带波动、高阻带衰耗的晶体滤波器，并给出了实例阐述实现滤波器的方法。通过测试结果与设计技术指标的对比，表明设计方案可以满足产品的技术要求。