宽调谐高线性超短波电调滤波器的设计与实现

Design and implementation of a wide-tuning high-linearity ultra-short wave electrically tunable filter

为减小多通道接收机中预选滤波器的体积,并提高其扫描滤波的精准性,依据电调滤波器技术具有连续调谐选通的特点,对电路结构进行优化,即增加耦合元件、变换耦合模式、引入阻抗变换,同时进行仿真分析,设计了一种插入损耗小、调谐范围宽、选择性高的电调滤波器电路机构来替代传统的亚倍频程滤波器。

In order to reduce the volume of preselector for multi-channel transceivers and increase the scanning filtering accuracy,the circuit configuration of electrically tuned filter was optimized according to its feature of continuous tuning,including addition of coupling elements,conversion of coupling mode and introduction of impedance transformation.Meanwhile,based on simulation analysis,an electrically tuned filter was designed featuring low insertion loss,wide tuning and high selectivity,for replacing the traditional suboctave filter.