摘要
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。
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.
出处
《天津职业技术师范大学学报》
2012年第4期9-12,共4页
Journal of Tianjin University of Technology and Education
基金
国家自然科学基金(60871026)
天津市应用基础及前沿技术研究计划(12JCYBJC10500)
关键词
陷波
微带低通滤波器
L形开路枝节
notch band
micro-strip low-pass filter
L-type open stub
