基于频变耦合结构的波导滤波器设计方法

摘要

A waveguide filter design method based on frequency dependent coupling structure was presented. The method was to handle the narrower bandwidth design problems which the traditional waveguide filter design method had without considering frequency characteristics of coupling structure. In the method , the coupling structure is equivalent to a frequency dependent inverter in order to incorporate the frequency dependence through changing the reactance slope parameter of the resonator. Finally, the example of designing a broadband waveguide filter verifies the validity of the method.%针对传统波导滤波器设计中没有考虑耦合结构频率特性导致带宽设计较窄问题，提出了一种基于频变耦合结构的波导滤波器设计方法，该方法将耦合结构等效为一个频变的阻抗变换器，通过等效电路变换将变换器频变特性的影响转换为对谐振腔电抗斜率参数的影响。最后，通过一个宽带波导滤波器的设计实例验证了该方法的有效性。