基于共面波导的平面电路研究及应用

发布时间：2018-03-06 10:32

本文选题：共面波导　切入点：超宽带滤波器　出处：《南京邮电大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着微波技术的应用日益广泛和要求不断提高,微波器件趋于小型化、集成化和宽带化。为满足日益发展的微波技术需求,一方面,新型的微波传输线不断被提出和应用,另一方面,微波电路的新结构新技术也不断涌现。共面波导以其易于与平面电路集成、设计更加灵活、辐射损耗小等优点成为十分有潜力的平面传输线。本文基于共面波导传输线,主要实现了两种超宽带滤波器。这两种滤波器,设计简单,易于加工集成,分别实现了相对带宽为150%和112%的宽通带。同时,本文实现的超宽带滤波器,采用了交指耦合结构、缺陷地结构和光子带隙结构等新结构,成功地将这些新结构与共面波导融合。这种融合利用交指耦合结构的紧耦合实现共面波导滤波器的宽通带,利用缺陷地结构和光子带隙结构的频率选择性改善共面波导滤波器的阻带,是对共面波导结合新结构的平面微波电路的有意义探索。本文依次对基于交指耦合结构的共面波导超宽带滤波器和基于光子带隙结构的共面波导超宽带滤波器进行仿真,分析了交指耦合结构的耦合枝节数量和耦合深度对滤波器通带的影响、缺陷地结构的选型和尺寸及光子带隙结构单元的选型对滤波器性能的影响。同时加工了这两个滤波器,将测试数据与仿真数据对比,具有较好的一致性,验证了本文提出的共面波导超宽带滤波器的设计可行。
[Abstract]:With the increasing application and improvement of microwave technology, microwave devices tend to be miniaturized, integrated and wideband. In order to meet the increasing demand of microwave technology, on the one hand, new microwave transmission lines have been proposed and applied. On the other hand, new structures and new technologies of microwave circuits are emerging. Coplanar waveguides are more flexible because of their easy integration with planar circuits. In this paper, two kinds of UWB filters are mainly realized based on coplanar waveguide transmission lines. The design of these two filters is simple and easy to process and integrate. A wide pass band with relative bandwidth of 150% and 112% is realized respectively. At the same time, the UWB filter, which is implemented in this paper, uses new structures, such as interDigital coupling structure, defective ground structure and photonic band gap structure, etc. These new structures are successfully fused with coplanar waveguides. This fusion uses the tight coupling of intersecting coupling structures to realize the wide pass band of coplanar waveguide filters. The frequency selectivity of defect ground structure and photonic band gap structure is used to improve the stopband of coplanar waveguide filter. It is a meaningful exploration of planar microwave circuits with coplanar waveguides combined with new structures. In this paper, the UWB coplanar waveguide filters based on interDigital coupling structure and the coplanar waveguide UWB filters based on photonic bandgap structures are simulated in turn. The effects of the number of coupling branches and coupling depth on the filter passband, the selection and size of defect ground structure and the type selection of photonic band gap structure unit on the filter performance are analyzed, and the two filters are machined at the same time. The comparison between the test data and the simulation data shows that the design of the coplanar waveguide UWB filter proposed in this paper is feasible.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN713;TN015

【相似文献】