平面结构悬置带状线带通滤波器设计

Design of Microwave Band-pass Filter with Planar Suspended Stripline

本文介绍了一种用平面悬置带状线结构实现的体积较小,阻带频率较宽的滤波器的设计方法,同时给出了一款这种滤波器的实例设计及其结果。运用网络综合法,根据所需技术指标,计算出理论上谐振单元之间的耦合系数和有载Q值。采用CAD方法进行了仿真,得到了相应的实际的微带耦合结构,与理论值进行比较继而优化,完成整个设计。具有通用性强,设计准确,减小研制周期等优点。

This article introduces a method of designing direct coupled microwave band-pass filter with smaller size and wider stop-band.This filter uses construction of planar suspended stripline.The article always gives a kind of this filter's design process and its simulation result.The ideal coupling coefficient between resonators can be obtained through network synthesis method according to the required specification.We can get the practical coupling structure by simulating with CAD.Then optimizing and comparing the simulation results with the ideal value,when they become as closer as possible,we choose that simulation value.Besides the universal applicability and veracity, the method can shorten product manufacturing cycle.