新型平衡带通滤波器的研究与设计

发布时间：2018-03-12 09:57

本文选题：基片集成波导　切入点：阶跃阻抗谐振器　出处：《南京邮电大学》2017年硕士论文　论文类型：学位论文

【摘要】：近年来,无线通信技术不断进步,对无线通信终端的要求也越来越高。就无线通信系统而言,滤波器是射频电路中一种很重要的器件。因此,研究和开发高性能的微波滤波器,是一项重要且具有研究意义的课题。平衡电路在构建现代通信系统中尤为重要,对平衡滤波器的研究具有重要的意义。本文以平衡带通滤波器为研究对象,分析了基片集成波导(SIW)的相关理论,研究了基于四分之一模基片集成波导(QMSIW)和八分之一模基片集成波导(EMSIW)的结构并设计了两款平衡带通滤波器,两款滤波器不仅尺寸很小,共模抑制性能也很优越。与此同时,为了充分利用现有的频谱资源,为了实现平衡双通带特性,本文分析了阶跃阻抗谐振器(SIR)的相关理论,阶跃阻抗谐振器(SIR)克服了均匀阻抗谐振器(UIR)结构过于简单,杂散频率是基频的整数倍等缺陷,具有更多的设计自由度。然后进一步研究了其实现双通带滤波器的原理,利用阶跃阻抗谐振器(SIR)的基本频率和杂散频率来实现两个通频带,通过调整其阻抗比来控制杂散频率。最终,设计了一款基于四分之一波长阶跃阻抗谐振器(SIR)的平衡双通带滤波器,该滤波器结构简单,尺寸很小,共模抑制性能也很好。相关的理论研究也是得到了很好的验证。
[Abstract]:In recent years, with the development of wireless communication technology, the requirement of wireless communication terminal is becoming higher and higher. In wireless communication system, filter is a very important device in radio frequency circuit. Therefore, high performance microwave filter is researched and developed. Balance circuit is very important in the construction of modern communication system, and it is of great significance to the research of balanced filter. In this paper, the balanced band-pass filter is taken as the research object. In this paper, the theory of the substrate integrated waveguide (SIW) is analyzed, the structure of the integrated waveguide based on the 1/4 mode substrate and the integrated waveguide of the 1/8 mode is studied, and two balanced bandpass filters are designed. The size of the two filters is not only very small. At the same time, in order to make full use of the available spectrum resources and to realize the balanced double pass band characteristics, the theory of step impedance resonator (SIRs) is analyzed. Step Impedance Resonator (SIR) overcomes the defects of uniform impedance resonator (UIRs), such as the simple structure, the fact that the spurious frequency is an integer multiple of the fundamental frequency, and has more degrees of freedom. Then, the principle of the double pass band filter is further studied. The basic frequency and stray frequency of step impedance resonator (SIR) are used to realize two frequency bands, and the spurious frequency is controlled by adjusting its impedance ratio. A balanced double pass band filter based on 1/4 wavelength step impedance resonator is designed. The filter is simple in structure, small in size and good in common mode suppression performance.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN713

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