一种基于调谐频率设计双调谐滤波器的新方法  

A new method for designing double-tuned filter based on resonance frequency

作　　者：方凤才[1] 

机构地区：[1]广西师范学院物理与电子工程学院,南宁530023

出　　处：《天津师范大学学报（自然科学版）》2014年第3期47-51,共5页Journal of Tianjin Normal University：Natural Science Edition

基　　金：广西省教育厅资助项目(201010LX268;2011JGA069)

摘　　要：针对双调谐滤波器的参数设计问题,提出一种基于调谐频率设计双调谐滤波器的方法.利用双调谐滤波器与2个并联的单调谐滤波器阻抗等效的原理,研究双调谐滤波器中串联谐振支路电感、电容和单调谐滤波器谐振频率、电容的关系,从而确定双调谐滤波器串联支路和并联支路的谐振频率.利用单调谐滤波器的谐振频率是双调谐滤波器的零点,确定并联支路的电感,结合并联支路的谐振频率确定并联支路的电容.该方法可以简化双调谐滤波器的设计运算,实例展示了该方法双调谐滤波器阻抗特性曲线,仿真分析表明:依据该方法设计的双调谐滤波器的滤波效果良好.To solve the problem of parameter setups of double-tuned filter, a method for designing double-tuned filter was proposed based on resonance frequency. The relationship between the inductance and capacitance of the serial resonance branch in the double-tuned filter and the resonance frequency of single tuned filter and its capacitance was studied using the principle that the impedance of double-tund filter is equivalent to the impedance of two parallel single tuned filters. The inductance of the parallel branch was calculated because resonance frequency of the single tuned filter is the zero of the double-tuned filter, then its capacitance was calculated with the parallel resonance frequency. This method simplified the operation process of the double-tuned filter, the impedance-frequency curve of double-tuned filter designed in this study was displayed in a specific case, and simulation results show that the filtering of the double-tuned filter is good.

关 键 词：双调谐滤波器 阻抗特性 串联谐振频率 并联谐振频率 

分 类 号：TN713.1[电子电信—电路与系统]