基于悬置线交指滤波器通带内插入损耗比较小,具有很高的选择性和很大的带外衰减,常应用于无线电收、发接收机以及雷达通信系统中。将综合设计法和微波电路仿真软件AdS(AdVAnCEd dESIgn SySTEM)相结合,设计悬置线终端短路式交指带通滤波器。根据交指滤波器的理论得到每个杆的归一化单位长自电容和两相邻杆的归一化单位长互电容,得到滤波器的最初尺寸。并利用AdS软件建模、仿真、优化调整,最后得到该滤波器的几何参数尺寸终值。该设计方法简单,适合工程应用。Inter-digital band-pass filters based on overhanging lines are often used in wireless transceivers and radar communication systems due to their low pass-band inserting attenuation,precise selectivity and high outer-band attenuation.The combination of traditional calculation method and microwave ADS(Advanced Design System) software is used to design a filter of this type.The normalized self-capacitor,mutual capacitor of unit length and the initial value of the geometry parameters of the filter are obtained in accordance with the theory of inter-digital band-pass filter.ADS software is utilized to build model,make simulation and optimizing adjustments.This method is simple and suitable for designing filter in practice.福建省自然科学基金资助项目(2006J0410);福建省科技计划项目(2008H0032
