基于可调谐滤波结构的多路功率分配器研究及其平面优化设计

Filter and power divider are two essential passive microwave components, and they are usually cascaded in system applications. Based on filter design theory, multi-way power divider which is redesigned with tunable filtering function is a new ideal for model integration and miniaturization. By importing tunable filtering function into power divider circuit model, this project aims to study the approach of the circuit modeling methods, analyze the relationship between filter function and power divider function, then provide the synthesis theory after combine the two functions effectively, discuss the relationship between tunable filtering function and isolation performance among output ports. Exploring the optimization approach to transfer three-dimensional topology network into planar circuit, clarify coupling mechanism and its compensation method in miniaturization and integration process. Through this research, the design theory of multi-way tunable filtering type power divider with planar structure will be built, realized and verified. The research in this proposal can provide valuable references for the research on other multi-function microwave circuit design, meanwhile, the project not only shows the important theoretical significance and technological innovation, but also provides low cost, high integration and high reliability microwave components in various communication systems and detection systems, and it will have wide markets and application prospect.

滤波器与功率分配器是微波系统中必不可少的两个无源器件，且两者在系统设计中经常级联使用。基于滤波理论重新设计功率分配器使之具备可调谐的滤波功能兼多端口功率分配功能，是微波器件模型集成化与小型化的新思路。本项目致力于将可调谐滤波功能导入多路功率分配器电路的建模方法，分析滤波功能与功率分配功能的关系并将两者有效结合的综合理论，讨论可调谐滤波与输出端口间隔离特性的关系，探索模型中立体拓扑结构平面优化的设计方法，阐明小型化、集成化过程中旁路耦合机理的解析与补偿方法的讨论。通过该项研究，建立起具有平面构造的多路可调谐微波型功率分配器的设计理论、实现方法及实验验证。本课题的研究为其它具有复合功能的微波电路设计提供借鉴，不仅具有重要的理论意义和技术创新性，同时将为通信、检测等领域的系统设计提供低价格、高集成度和高可靠性的微波器件，具有广泛的市场和应用前景。

微波系统中滤波器和功率分配器是两个必不可少的无源器件，由于这两类器件的尺寸较大且使用数量较多，极大地影响了系统的小型化和集成化。本项目基于滤波理论重新指导功率分配器的设计，使其同时具备了滤波和功率分配的性能，且保持输出端口之间的隔离特性以及每个输出端口的反射特性。具体方法是通过将滤波器结构带入功率分配器的数学模型中，重新解析多路奇偶模等效电路及其隔离网络约束条件，设计出多路平面化电路。此外，在此基础上分别实现了频率可调型功率分配器和可重构型功率分配器，为后期功能复合型器件的综合设计打下了坚实的基础。.本项目提出了一种普遍适用的滤波型功率分配器结构，其滤波带宽和插入损耗的讨论方式是传统滤波器的设计完全一致，通过综合方法和设计流程图的使用，各个端口的反射及隔离特性由电阻的位置与数值确定，保证了整体功率分配器的特性。此方法对功能融合型器件的设计具有一定的指导作用，由于电路测试结果较好、容易加工，可以广泛应用于产业设计。.项目执行以来，发表SCI论文7篇，包括IEEE Trans. Microw. Theory Tech.、IEEE Microw. Compon. Lett.、IEEE Trans. Circuits Syst., II. Exp. Briefs等国际知名期刊；国际会议论文10篇；已授权中国发明专利4项。