异步调谐耦合谐振器差分滤波器综合理论与关键技术研究

Mixed coupling theory and cross coupling theory can realize the filter's miniaturization and high performance, so it has attracted academic attention. Firstly, the definition and extraction method of the asynchronously tuned coupled-resonator mixed coupling coefficients are improved. Asynchronously tuned coupled-resonator mixed coupling matrix and asynchronously tuned coupled-resonator mixed coupling theory will be established. The mixed coupling theory will be improved. Secondly, controllable mixed coupling structures are proposed based on mixed coupling theory. Differential filters and electronically tunable differential filters are also designed based on mixed coupling structures. The pass-band bandwidth and out band rejection of the filters can be controlled independently because they have independently controllable mixed coupling coefficients and transmission zeros. Thirdly, asynchronously tuned coupled-resonator mixed coupling term will be introduced into the coupling matrix and asynchronously tuned coupled-resonator mixed cross coupling matrix is formed. The asynchronously tuned coupled-resonator mixed cross coupling theory is established. Mixed cross coupling differential filters and electronically tunable differential filters are presented based on the asynchronously tuned coupled-resonator mixed cross coupling theory. Finally, differential filters and electronically tunable differential filters which apply to communications and radar system will be designed. Synthesis and design methods of differential filters and electronically tunable differential filters based on the mixed coupling theory and the mixed cross coupling theory will be established. This study will promote the development of differential filters and other microwave circuits.

混合电磁耦合理论和交叉耦合理论由于能够实现滤波器小型化和高性能而引起学者关注。本项目首先改进异步调谐耦合谐振器混合电磁耦合系数定义和提取方法，构造异步调谐耦合谐振器混合电磁耦合矩阵，建立异步调谐耦合谐振器混合电磁耦合理论。然后基于异步调谐耦合谐振器混合电磁耦合理论提出可控混合电磁耦合结构，运用可控混合电磁耦合结构实现中心频率可调节、通带带宽和带外抑制可控制的差分滤波器和电可调差分滤波器。其次将混合电磁耦合项引入到交叉耦合矩阵中，形成异步调谐耦合谐振器混合交叉耦合矩阵，建立异步调谐耦合谐振器混合交叉耦合理论。再次基于异步调谐耦合谐振器混合交叉耦合理论设计混合交叉耦合差分滤波器和电可调差分滤波器。接着设计适用于通信系统和雷达系统的差分滤波器和电可调差分滤波器。最后建立混合电磁耦合差分滤波器综合设计方法和混合交叉耦合差分滤波器综合设计方法。该研究将促进差分滤波器的发展，同时将促进微波电路的发展。

随着通信技术的发展，便携式无线通信电子设备要求微波器件朝着小型化、平面化以及集成化方向发展。本项目首先改进了异步调谐耦合谐振器混合电磁耦合系数定义和提取方法，构造了异步调谐耦合谐振器混合电磁耦合矩阵，建立了异步调谐耦合谐振器混合电磁耦合理论。本项目针对电耦合结构带通滤波器理论研究与设计方面，通过终端开路的平行耦合线设计了电耦合结构带通滤波器。混合电耦合结构带通滤波器的中心频率、通带带宽和带外抑制实现了独立调节。本项目针对混合电磁耦合结构带通滤波器理论研究与设计方面，通过终端开路实现电耦合，通过终端短路实现磁耦合。通过终端短路和终端开路的平行耦合线设计了混合电磁耦合结构带通滤波器和差分带通滤波器。混合电磁耦合结构带通滤波器的中心频率、通带带宽和带外抑制实现了独立调节。本项目针对基于平行耦合线馈电的宽带带通滤波器研究与设计方面，分析了平行耦合线馈电特点，将十字形谐振器与异向介质谐振器组合，通过平行耦合线馈电，设计了宽带带通滤波器。本项目针对缺陷微带结构带阻滤波器研究与设计方面，分析了缺陷地结构和缺陷微带结构谐振特性，设计了双频带带阻滤波器，实现了双阻带的单独调控。研究了单一缺陷微带结构，通过单一缺陷微带结构设计了双频带带阻滤波器。本项目研究了混合交叉耦合结构带通滤波器理论。本项目研究了混合电磁耦合结构滤波器理论与设计，对滤波器后期调试进行了分析，具有实用价值和应用前景，能够带来较好的经济与社会效应。