【作者】 倪大宁；

【导师】 谢拥军；

【作者基本信息】 西安电子科技大学 ， 电磁场与微波技术， 2007， 硕士

【摘要】 与传统微波滤波器相比,交叉耦合滤波器能够提高性能并减小尺寸,因此受到了广泛的关注和研究。本文主要研究了交叉耦合滤波器的相关理论与技术,重点分析了源-负载耦合交叉耦合滤波器的综合设计方法。首先,在回顾微波滤波器一般设计理论的基础上,研究了交叉耦合理论。给出了交叉耦合滤波器的等效电路模型,分析了标准椭圆函数与交叉耦合电路传输函数的差异,提出了准椭圆函数的修正方法。接着,给出了一般交叉耦合滤波器耦合矩阵的三种求解方法,并以此为基础,给出了若干设计实例。最后,深入研究了源-负载耦合交叉耦合滤波器的综合设计理论,给出其等效电路模型以及耦合矩阵的解析求解方法,并在此基础上设计了两种结构新颖的六边形源-负载耦合交叉耦合微带滤波器。测试数据、仿真响应曲线与理论分析结果一致性良好,这不但证明了这种新型滤波器在满足设计要求和增加带外零点的同时能够减小几何尺寸,同时也验证了本文提出的综合设计方法的有效性。更多还原

【Abstract】 Compared with traditional microwave filters, cross-coupling resonator filters can provide higher selectivity and smaller size. Therefore, cross-coupling resonator filters have received wide interests and intense research efforts. In this thesis, the synthesis and design theory of the cross-coupling resonator filter, as well as the related theories and technologies, are studied. Emphasis has been laid on the synthesis and design of the cross-coupling resonator filter with source-load coupling.Firstly, based on the general design theory of general filters, the synthesis and design theory of the cross-coupling resonator filter have been studied. The equivalent circuit model has been presented, and the difference between the elliptic function and the transfer function of the cross-coupling resonator filter is analyzed. Then the methods for generating the quasi-elliptic function are demonstrated. Secondly, the techniques for synthesis of the coupling matrix are given, and several design examples are presented. Lastly, synthesis and design of cross-coupling resonator filter with source-load coupling are studied in detail. The modified equivalent circuit model is provided and the methods for synthesizing the coupling matrix are introduced. According to this, two kinds of novel hexagon resonator filters are designed. The measured data, simulated results and the ideal data are in good agreement, which not only verifies the synthesis method discussed in this paper, but also demonstrates that the novel structures can effectively reduce the size and enhance the performance of the filter.更多还原