使用T型结构的紧凑型电感耦合滤波器设计

General Design of Compact Inductively Coupled Filter with T-Shaped Structure

提出了一种使用T型结构的紧凑型电感耦合滤波器,理论分析表明,使用这种由传输线中央加载容性电纳的T型结构来替代传统传输线,在不影响滤波器响应的同时可以有效地缩减滤波器的尺寸,获得电路结构的小型化。基于这一原理,笔者设计了一个三阶切比雪夫型电感耦合带通滤波器,仿真结果表明:T型结构不仅可以完美地满足滤波器设计要求,同时还可以使结构更加紧凑。

This article puts forward a method of using T-shaped structure inductively coupled filter.Theoretical analysis shows that the response won＇t alter when using this central loaded capacity susceptance transmission line of the T-shaped structure to replace the traditional transmission lines.What＇s more,it can reduce the filter＇s size effectively and obtain the miniaturization of the circuit.Based on this theory,this article shows a three poles chebyshev type inductively coupled band-pass filter,and the simulation results indicate that the T-shaped structure can reduce the filter＇s length obviously and make the circuit more compact.