陷波低通滤波器设计

陷波低通滤波器设计

内容简介：提出了一种寄生陷波频带的方法，用于低通滤波器通带内，可以实现部分阻带功能。该方法在传统切比雪夫Ⅰ型低通滤波器上寄生一对完全对称的L形开路枝节，实现了一种陷波功能，进而对该枝节的几何参数与陷波特性之间的关系进行了研究。结果表明：改变L形开路枝节的几何尺寸，可以灵活调节陷波频带的中心频率和带宽。实验结果对该设计进行了验证。

Abstract：A low-pass filter with notched band is proposed and implemented. Inside the passband of filter, stopband function is realized by inserting a pair of L-type stubs into the Chebyshev I filter. These stubs are with symmetrical structure. Therefore, the notched band can be easily generated and set at any desired frequency by changing parameters. Relationship between the parameters of L-stubs and characteristics of notch-bands is also discussed. Finally, the design is verified by full-wave EM simulation and the experiments.

作者：冯立营, 郑宏兴,

关键词：陷波, 微带低通滤波器, L形开路枝节