基于DGS的双通带滤波器设计

发布时间：2018-10-20 10:11

【摘要】：微波滤波器能够有效地抑制通信信道带外噪声,均衡带内幅度和相位等特性,随着通信模式的多样化,单频段的通信已很难满足这种变化带来的需求。例如在WiMAX、WLAN、GPS设备中,接收机需同时接发多个频段的信号。作为射频系统中的一种重要器件,双通带滤波器在通信系统中有着重要的作用,这使得双通带滤波器的研究具有重要的意义。本文前三章为理论分析部分。第一章首先对双通带滤波器的研究背景和意义进行了阐述,然后分析了双通带滤波器的研究现状与进展。第二章介绍了DGS结构的产生,列举了几种具有典型结构的DGS。通过分析哑铃型DGS结构介绍了该结构等效电路的提取原理,并用仿真软件进行了提取。第三章介绍了滤波器一般理论,比较了几种低通滤波器原型响应,介绍了滤波器频率变换的原理。第四章为本论文的设计以及结果分析部分。首先对环形谐振器的频率特性进行了分析,将箭型DGS结构和环形谐振器结合设计了一款工作于WiMAX和WLAN频段的双通带滤波器。在此基础上将箭型DGS结构换成C型DGS结构,仿真与测试结果表明C型DGS结构滤波器较箭型DGS结构滤波器相比具有更好的频率选择性。最后探讨了一些在进行滤波器的加工和测试中应当注意的问题。第五章对本文做了一些总结和展望。
[Abstract]:Microwave filter can effectively suppress the out-of-band noise, equalize the amplitude and phase of the communication channel. With the diversification of communication modes, it is difficult to meet the demand of this change in single-band communication. For example, in a WiMAX,WLAN,GPS device, a receiver needs to simultaneously receive and transmit signals in multiple frequency bands. As an important device in radio frequency system, double pass band filter plays an important role in communication system, which makes the research of double pass band filter of great significance. The first three chapters of this paper are theoretical analysis. In the first chapter, the research background and significance of double pass band filter are introduced, and then the research status and progress of double pass band filter are analyzed. The second chapter introduces the generation of DGS structure, and enumerates several kinds of DGS. with typical structure. The extraction principle of equivalent circuit of dumbbell-shaped DGS is introduced by analyzing the structure of dumbbell-shaped DGS, and the extraction is carried out by simulation software. In chapter 3, the general theory of filter is introduced, the prototype response of several low-pass filters is compared, and the principle of filter frequency transformation is introduced. The fourth chapter is the design and result analysis of this paper. Firstly, the frequency characteristics of the ring resonator are analyzed, and a double pass band filter working in the WiMAX and WLAN bands is designed by combining the quiver DGS structure with the ring resonator. On this basis, the quiver DGS structure is replaced by C type DGS structure. The simulation and test results show that C-type DGS structure filter has better frequency selectivity than quiver DGS structure filter. Finally, some problems that should be paid attention to in the processing and testing of filters are discussed. The fifth chapter makes some summary and prospect to this article.
【学位授予单位】：安徽大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN713.5

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