高可靠性多路腔体滤波器组的设计与实现

Design and Implementation of a Multi Channel Cavity Filter Bank With High Reliability

该文实现了一个高可靠性、小体积的多路腔体滤波器组,包括四路对一致性要求较高的带通滤波器通道,以及一路由直通线缆和防雷电路板构成的校准通道。通过HFSS进行全腔仿真保证了仿真精度,并在Matlab中编程实现滤波器耦合系数的提取。利用Matlab和HFSS联合仿真的方式缩短了腔体滤波器仿真和调试的时间。设计不规则形状谐振腔,采用多通道滤波器形成整体组件结构的形式实现了系统小型化。通过算法、结构设计、调试技术等共同保证相位一致。利用各种浪涌抑制器件的特点设计三级防雷电路,实现了高可靠性系统保护。

This paper presents a multi-channel cavity filter bank with high reliability and small size.It consists of four band-pass filter channels which require high consistency and a calibration channel composed of a straightthrough cable and a lightning protection circuit board.The whole cavity simulation is carried out by HFSS to ensure the accuracy of the simulation,and the diagnosis programs(Matlab codes)of the cavity band-pass filter have been developed to extract the coupling coefficient of the filter.The Matlab and HFSS co-simulation can greatly reduce the simulation and debugging time.A multi channel filter bank and the resonator cavity with irregular shape are adopted to form the integral component structure to realize the miniaturization of the system.The phase consistency is ensured through the algorithm,the structure design,the debugging technology and so on.The three-level lightning protection circuit is designed by taking advantage of the features of the surge suppression devices and the high reliability protection of the system is realized.