带通滤波器矩形系数的理论分析与仿真  

Theoretical Analysis and Simulation of Shape Factor of Bandpass Filter

作　　者：胡保全 占腊民[2] 陈长忠 李文广[2] HU Baoquan;ZHAN Lamin;CHEN Changzhong;LI Wenguang(Aviation Industry Shanfei Company,Hanzhong 723000;Huazhong University of Science and Technology,Wuhan 430074)

机构地区：[1]中航工业陕飞公司,汉中723000 [2]华中科技大学,武汉430074

出　　处：《舰船电子工程》2019年第8期100-102,107,共4页Ship Electronic Engineering

基　　金：国家自然科学基金项目（编号：61001012）;国家留学基金委项目（编号：20163192）资助

摘　　要：依据频率映射公式,定量推导出带通滤波器矩形系数公式,揭示了带通滤波器kdB矩形系数就是其等效低通原型滤波器幅频特性曲线在kdB和3dB衰减处的归一化频率的比值、矩形系数与带通滤波器带宽无关等规律,并以常见的Butter-worth、Chebyshev滤波器为例,在ADS环境中对上述结果进行了仿真验证。Based on the frequency mapping formula,the share factor of bandpass filter is derived quantitatively,it is revealed that the kdB share factor of bandpass filter is the ratio of normalized frequency of its equivalent low-pass prototype filter's amplitude-frequency characteristic curve at the attenuation of kdB and 3dB,and the share factor is independent of the bandwidth of bandpass filter.Taking common Butterworth and Chebyshev filters as examples,the above results of bandpass filter are verified by ADS simulation.

关 键 词：矩形系数 频率映射 BUTTERWORTH滤波器 Chebyshev滤波器 

分 类 号：TN713.5[电子电信—电路与系统]