基于SIW的功分器的研究与设计

发布时间：2018-01-12 08:00

本文关键词：基于SIW的功分器的研究与设计　出处：《云南大学》2016年硕士论文　论文类型：学位论文

【摘要】：功率分配器在微波通信系统中有着不可替代的地位,它的主要功能是对输入信号功率进行分配或组合。功分器主要应用在MIMO天线、射频系统终端等领域。传统功分器由于其结构、制造工艺、工作特性等方面的局限性,已经越来越不能适应现代化的通信系统。本文提出的基于SIW的功分器解决了传统功分器存在的种种缺点,拥有良好的发展前景。本文简述了功分器的研究背景,回顾了基于SIW的功分器的发展史,重点讨论了当前的功分器研究现状；详细介绍了威尔金森功率分配器的设计原理,在此理论基础上,仿真了一种双频威尔金森功分器；阐述SIW结构及其传输特性,并利用金属波导等效出基片集成波导的模型,为实际的设计打好基础。本文在传统T型和Y型基片集成波导功分器的基础上,提出基于SIW的紧凑型功分器,它是正六边形结构,尺寸更小结构紧凑,大大减小了电路的尺寸。同时对此紧凑型功分器中的电感柱进行深度分析,分析了电感柱半径大小对该功分器回波损耗的影响,并根据优化结果对紧凑型功分器重新进行设计,仿真结果表明该功分器的性能得到明显提高,60%带宽的回波损耗降低到-15dB以下。同时在上述紧凑功分器结构基础上,设计了一种开槽的SIW功分器,不仅进一步提高了功分器的传输性能,还使功分器带宽增加了一倍。最后,提出一种新型的多路不等分SIW功分器,工作带宽在10.6GHz-13.3GHz,且带内回波损耗均在-10dB以下。
[Abstract]:Power divider has an irreplaceable position in microwave communication system. Its main function is to distribute or combine the input signal power. The power divider is mainly used in MIMO antenna. The traditional power divider is limited by its structure, manufacturing process, working characteristics and so on. The power divider proposed in this paper based on SIW has solved the shortcomings of the traditional power divider. This paper briefly introduces the research background of the power divider, reviews the history of the power divider based on SIW, and discusses the current research status of the power divider. The design principle of Wilkinson power divider is introduced in detail. On the basis of this theory, a dual-frequency Wilkinson power divider is simulated. The SIW structure and its transmission characteristics are described, and the model of the substrate integrated waveguide is obtained by using the metal waveguide, which lays a good foundation for the practical design. This paper is based on the traditional T and Y type integrated waveguide power dividers. A compact power divider based on SIW is proposed, which is a hexagonal structure with a compact size, which greatly reduces the size of the circuit. At the same time, the depth analysis of the inductance column in the compact power divider is carried out. The influence of the radius of the inductor column on the echo loss of the power divider is analyzed, and the compact power divider is redesigned according to the optimization results. The simulation results show that the performance of the power divider is obviously improved. The echo loss of 60% bandwidth is reduced to -15dB. A slotted SIW power divider is designed on the basis of the compact power divider structure mentioned above, which not only improves the transmission performance of the splitter further. Finally, a novel multi-channel unequal SIW splitter is proposed, with a bandwidth of 10.6GHz to 13.3GHz. The in-band echo loss is below -10 dB.
【学位授予单位】：云南大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN626

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