基于SIW技术的高性能带通滤波器的设计与实现

发布时间：2018-07-03 14:41

本文选题：基片集成波导 + 带通滤波器　；参考：《西安电子科技大学》2015年硕士论文

【摘要】：基片集成波导(Substrate Integrated Waveguide,SIW)作为一种新的导波结构,不但继承了金属矩形波导和微带线的低辐射损耗、高品质因数、高功率容量、体积小、重量轻等优势,而且易于加工和平面集成。这些优点使SIW技术在学术界及工业界都得到了极其广泛的应用。因此,基于SIW技术设计高性能滤波器成为当今微波滤波器领域的重要研究方向。首先,本文系统的介绍了微波滤波器设计的主要参数及主要方法、SIW技术的基本理论及基于SIW技术的各类微波器件;重点讨论了SIW结构的传输特性以及SIW与微带线过渡结构的设计,并仿真分析了多种共面过渡结构的传输特性,为后文SIW带通滤波器的研究奠定基础。然后,本文提出了几种常见的缺陷地结构(DGS),并重点分析了曲折型缺陷地结构的等效电路和传输特性。在此基础上,结合SIW结构的高通特性和DGS单元的低通特性,实现了一种基于曲折型缺陷地结构的带通滤波器,具备小型化、易加工、低损耗、高频率选择性等特点。文章最后提出了一种基于双平面谐振元(DP-RC)技术设计高性能带通滤波器的方法。该DP-RC滤波器在SIW结构的基础上,兼顾SIW结构上表面和金属接地面的开发,通过在SIW结构的上表面加载U型槽,下表面蚀刻H型分形缺陷地结构构成。然后根据最优仿真结果加工出了相应的DP-RC带通滤波器实物,并用矢网对该DP-RC滤波器的传输特性进行测量。实测结果与仿真结果吻合良好,也进一步证明运用双平面谐振元技术设计带通滤波器这一思路的正确性和可靠性。与传统的SIW滤波器相比,本文提出的DP-RC带通滤波器能够大幅度提高滤波器的整体性能,并且减少了滤波电路的占用面积,具有一定的工程应用价值。
[Abstract]:As a new guided wave structure, substrate Integrated waveguide (SIW) not only inherits the advantages of low radiation loss, high quality factor, high power capacity, small volume and light weight of metal rectangular waveguide and microstrip line, but also is easy to process and integrate with plane. These advantages make SIW technology widely used in academia and industry. Therefore, the design of high performance filters based on SIW technology has become an important research direction in the field of microwave filters. Firstly, this paper systematically introduces the main parameters and methods of microwave filter design and the basic theory of SIW technology and all kinds of microwave devices based on SIW technology. The transmission characteristics of SIW structure and the design of SIW and microstrip line transition structure are discussed, and the transmission characteristics of several coplanar transition structures are simulated and analyzed, which lays a foundation for the study of SIW band-pass filter later on. Then, several common defect ground structures (DGS) are proposed, and the equivalent circuit and transmission characteristics of zigzag ground structures are analyzed. On this basis, combining the high pass characteristic of SIW structure and the low pass characteristic of DGS unit, a kind of bandpass filter based on zigzag defect ground structure is realized, which has the characteristics of miniaturization, easy processing, low loss and high frequency selectivity. In the end, a high performance bandpass filter based on biplane resonant element (DP-RC) is proposed. On the basis of SIW structure, the DP-RC filter takes account of the development of the upper surface and metal ground of SIW structure. By loading U-shaped groove on the upper surface of SIW structure, the structure of H-type fractal defect is etched on the lower surface. Then the DP-RC band-pass filter is processed according to the optimal simulation results and the transmission characteristics of the DP-RC filter are measured by vector network. The measured results are in good agreement with the simulation results, which further proves the correctness and reliability of the band-pass filter design using the biplane resonant element technique. Compared with the traditional SIW filter, the DP-RC bandpass filter proposed in this paper can greatly improve the overall performance of the filter and reduce the occupied area of the filter circuit.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN713.5

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