面向一类多频滤波功分器的通用综合设计方法

General Synthesis Design of a Class of Multi-band Filtering Power Dividers

提出了一种通用的新型多频带滤波功分器综合设计方法,该方法在工业领域和学术领域都具有潜在的应用前景。首先建立了一套完整的闭环解析方程并进行直接综合设计,然后详细展示了所提出的方法在设计任意预设滤波响应(如任意阶数、频带数等)的多频带滤波功分器时的能力,所设计的滤波功分器具有良好的隔离和匹配。因此,该综合方法可以为现代无线通信系统中的多频带滤波功分器提供有效统一的设计指导。设计并制作了三阶双频和三阶三频微带滤波功分器模型作为实例,并进行了测试。测试结果与仿真结果吻合较好,从而验证了所提出的综合设计方法的可行性和所设计的多频带滤波功分器的良好性能。

In this paper, a general new synthesis design technique of multi-band coupled resonator filtering power dividers(FPDs) is presented, which is promising in both industrial and academic field. After a set of complete closed-form analytical equations are established for direct synthesis design, the proposed method is intensively described to reveal its powerful capacity in design of a multi-band FPD with any pre-specified frequency response of multiple filtering passbands(e.g. any order, number of bands, etc.), high multi-band isolations and matching. Therefore, this synthesized method can provide a unified design guideline for a multi-band FPD with various specifications as required by modern industrial wireless communications systems. As examples, two third-order dual-band and triple-band microstrip FPD prototypes are designed, fabricated and measured for demonstration. Measured results coincide well with simulated ones, thereby verifying the feasibility of proposed synthesis design method and attractive performances of the designed multi-band FPDs.