一种结构新颖的双通带滤波器的仿真设计

为使工作在多个分离频段的无线通信系统能够公用一个多模终端实现不同的业务需求,采用零极点综合技术抽取了滤波器的耦合矩阵,借助经验公式实现了普通波结构滤波器向基片集成波导滤波器的转换,最终设计了一个结构新型双通带滤波器。仿真结果表显示滤波器通带内回波损耗大于15dB,插损小于1.8dB,通带间隔离大于13dB。与传统矩形波导双通带滤波器相比,该滤波器具有成本低、重量轻、体积小和容易加工等优点。

Simulative Design of a Novel Dual-Passband Filter

A novel dual-passband filter was designed to ensure a multimode terminal can be shared in wireless communication system operating at different frequency channels.The coupled matrix of the filter was extracted using synthesis technique of poles and zeros,the conversion from traditional waveguide structure to SIW was realized by dint of experiential formula,At last,the dual-passband filter was realized using the substrate integrate waveguide cavity resonators.The simulated results show that the return loss is better than 15dB and the insertion lower is greater than 1.8dB and the isolation between two-channel is better than 13dB.Compared with conventional rectangle waveguide dual-passband filter,this structure has many advantages such as low cost,light weight,compact size and easy fabrication.