基于复合左右手传输线的多通带滤波器的研究

发布时间：2018-07-06 20:37

本文选题：复合左右手 + 多通带滤波器　；参考：《电子科技大学》2015年硕士论文

【摘要】：在通信技术飞速发展和频谱资源的日益紧张的今天,高性能已经成为无线通信产品的必然发展趋势。作为通信前端的重要组成部分,多通带滤波器的性能的好坏直接影响着通信产品的优劣,因而对多通带滤波器研究具有重要的意义。此外,随着对通信产品体积的要求越来越高,小型化已经成为滤波器研究的重点。复合左右手传输线凭借其特殊的左手特性,在滤波器的小型化和高性能上有重要的应用。本文对T型复合左右手传输线结构进行了建模和参数提取。结合λ/4传输线和T型结构,设计了三通带滤波器。利用T型结构取代λ/4传输线,得到了一个拥有五个传输零点的三通带滤波器;利用折叠的SIR谐振器取代开路枝节,最终得到具有五个传输零点的小型化三通带滤波器。同时,再设计过程中可以通过调节内嵌的T型结构实现对第二通带的调节。对叉指结构及基于叉指结构的复合左右带通滤波器进行了建模和参数提取。随后通过添加开路枝节,最终得到了双通带滤波器。通过改变中心开路枝节的长度达到了对陷波中心频率的调节。对互补开口谐振环复合左右手传输线结构进行了建模;通过对基片集成波导结构加载互补开口谐振环,利用基片集成波导的多模特性得到了一个双通带带通滤波器;通过互补开口谐振环和缺陷地结构相结合得到了一个小型化双通带滤波器。对蘑菇型复合左右手传输线进行了建模分析;利用开口谐振环对蘑菇型结构进行了小型化,并以此为基础设计了一个小型化带通滤波器;随后将小型化蘑菇型结构和T型结构通过并行结构结合起来,得到了一个通带相互独立的双通带滤波器。以上所有多通带滤波器都进行了加工,所得的测试结果与仿真结果有较好的吻合,验证了理论分析的正确性。
[Abstract]:With the rapid development of communication technology and the increasing shortage of spectrum resources, high performance has become the inevitable development trend of wireless communication products. As an important part of the front end of communication, the performance of multi-pass band filter directly affects the quality of communication products, so it is of great significance to study multi-pass band filter. In addition, with the increasing demand for the volume of communication products, miniaturization has become the focus of filter research. Composite left-hand transmission lines have important applications in the miniaturization and high performance of filters due to their special left-handed characteristics. In this paper, the structure of T-type compound left-right-hand transmission line is modeled and its parameters are extracted. Combined with 位 / 4 transmission line and T type structure, a three pass band filter is designed. A three-way band filter with five transmission zeros is obtained by replacing 位 / 4 transmission lines with T-type structure, and a miniature three-way band filter with five transmission zeros is obtained by using folded Sir resonator to replace the open branch section. At the same time, the adjustment of the second pass band can be realized by adjusting the embedded T-type structure in the process of redesign. Modeling and parameter extraction of cross-finger structure and compound left and right-pass filter based on cross-finger structure are carried out. After that, a double pass band filter is obtained by adding an open branch. The frequency of notch center is adjusted by changing the length of open branch. By loading the complementary open resonant ring structure with the complementary open resonator ring, a dual-pass band-pass filter is obtained by using the multi-mode characteristics of the substrate integrated waveguide, and the composite left-right hand transmission line structure of the complementary open-end resonant ring is modeled, and a dual-pass band-pass filter is obtained by loading the complementary open-end resonant ring structure. A miniaturized double pass band filter is obtained by combining the complementary open resonant ring with the defective ground structure. The model of mushroom compound left-right transmission line is analyzed, the mushroom structure is miniaturized by the open resonant ring, and a miniaturized bandpass filter is designed. Then we combine the miniaturized mushroom structure and the T-type structure by parallel structure to obtain a passband independent double pass band filter. All the multipass filters are processed, and the experimental results are in good agreement with the simulation results, which verifies the correctness of the theoretical analysis.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN713

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