摘要：
在通信系统中,微波多工器由微波滤波器组成,主要用于分离和合并窄带射频信号,起着十分重要的作用.传统方法鲜有考虑滤波器负载为复阻抗的情况,针对此问题,介绍了一种负载为复阻抗的微波滤波器直接综合方法,并将其应用于微波多工器设计.通过功率波归一化理论,得到相同滤波器网络在端接复阻抗负载和实常数负载情况下特征多项式的关系,给出了一组可描述匹配复阻抗负载的滤波器网络特性的特征多项式.利用耦合矩阵综合方法,得到端接复阻抗的滤波器耦合矩阵.将此方法应用于多工器的设计,以三工器为例列出综合步骤,最后通过仿真得到响应曲线,验证了方法的可行性.%In the communication system, the microwave multiplexer is made up of the microwave filter, which is mainly used to separate or combine the narrow band radio frequency signals , which plays a very important role. The traditional method is rarely considered for the filter with complex load. For this problem, a new method of microwave filter with complex load is introduced, which is applied to the design of the microwave multiplexer. Through the wave power normalization theory , obtained the relationship between the characteristic polynomial of the filter network connected complex impedance load and constant load, given a set of characteristic polynomial which can describe the responds of filter with complex load. By using the coupling matrix synthesis method , the coupling matrix of the filter is obtained. This method is applied to the design of the multiplexer , taking the triplexer as an example to list the synthesis steps. Finally , the response curve is obtained by simulation , which verifies the feasibility of the method.
