接收机带通滤波器的设计

Design of Bandpass Filter for Receiver

采用巴特沃思型和贝塞尔函数型2种方法进行接收机带通滤波器设计,借助EDA对该滤波器进行波特图和群延迟特性的比较。仿真结果表明贝塞尔函数设计的滤波器通带起伏小,阻带衰减大,在通带内群延迟特性较好,可以很好满足设计要求。

Butterworth-type and Bessel function-type two ways are used for design of Bandpass filter for receiver, and with the help of EDA simulation tools, the bold plot and the group delay characteristics of the filters designed are compared. Bessel function design simulation results show the small pass-band ups, stop-band attenuation, in the pass-band with a better group delay characteristics, which can meet the design requirements.