高性能平面集成带通滤波器研究与设计

发布时间：2018-03-15 09:12

本文选题：基片集成波导　切入点：双模　出处：《信阳师范学院》2017年硕士论文　论文类型：学位论文

【摘要】：微波滤波器作为当代无线通讯系统电路前端的无源器件之一,其性能的优劣直接影响整个系统的质量。随着无线通信技术与系统级封装SIP(system in package)技术的发展,人们对微波毫米波系统中高性能滤波器的需求越来越强烈。因此,研究与设计平面集成的高性能小型化滤波器已经变得非常重要。本文利用基片集成波导(Substrate Integrated Waveguide,SIW)技术开展研究,结合双模技术与混合电磁耦合理论分别设计了一款SIW双模带通滤波器和可控混合电磁耦合的SIW准椭圆滤波器,并进行了实验验证。论文的主要内容如下:第一章绪论部分简要介绍了该论文的研究背景及其意义,通过调研国内外大量相关文献对基片集成波导技术的发展历程、研究现状及滤波器设计进行了描述,阐述了本论文的主要内容。第二章介绍了滤波器的相关理论知识。从不同的角度出发对滤波器的分类进行了描述,介绍了滤波器的概念原理及主要的设计参数指标,重点分析了最平坦型(Butterworth)、切比雪夫型(Chebyshev)和椭圆函数型(Quasi-elliptic)低通滤波器原型,给出了低通原型到带通滤波器的频率变换。第三章设计了一种新型的双模SIW带通滤波器,并对该滤波器结构进行了仿真研究和测试分析。该滤波器中心频率在11.33 GHz处,通带内插入损耗小于1.2 dB,回波损耗优于20 dB,通带两侧产生了2个传输零点。为了进一步验证这款滤波器的性能,基于单层PCB工艺制作了滤波器实物,测试数据与仿真结果吻合较好。测试结果表明,该结构能够减小滤波器的体积,更有利于器件的小型化,同时还能够有效减小辐射损耗,使通带两侧的衰减变得更好,提高了滤波器的频率选择性。第四章基于SIW技术与单层PCB加工工艺,提出了一种新型的可控混合电磁耦合结构。该结构通过两SIW谐振腔之间的感性窗口来实现磁耦合,电耦合的强度利用谐振腔顶层金属上刻蚀出的三条对称的槽线的尺寸来调整。基于二阶混合电磁耦合滤波单元,仿真设计并制作了一款电耦合占优的具有准椭圆函数响应的三阶滤波器。仿真和测试的结果表明了该滤波器具有低插损、高选择性、宽阻带,可以灵活地调节传输零点的位置,易于平面集成等优点。
[Abstract]:Microwave filter is one of the passive devices in the front end of wireless communication system, and its performance directly affects the quality of the whole system. With the development of wireless communication technology and system-level encapsulation in package technology, The demand for high performance filters in microwave and millimeter wave systems is increasing. Therefore, it has become very important to study and design planar integrated high performance miniaturized filters. A SIW dual-mode band-pass filter and a controllable hybrid electromagnetic coupling SIW quasi-elliptic filter are designed by combining the dual-mode technique with the hybrid electromagnetic coupling theory. The main contents of the thesis are as follows: in the first chapter, the background and significance of the thesis are introduced briefly, and the development course of the substrate integrated waveguide technology is discussed by investigating a large number of related literatures at home and abroad. The research status and filter design are described, and the main contents of this paper are described. In chapter 2, the relevant theoretical knowledge of filter is introduced, and the classification of filter is described from different angles. The concept principle and main design parameters of the filter are introduced. The prototype of the flattened Butterworth, Chebyshev-type Chebyshevand elliptic function Quasi-elliptic lowpass filter is analyzed. In chapter 3, a novel dual-mode SIW band-pass filter is designed, and the structure of the filter is simulated and tested. The center frequency of the filter is 11.33 GHz. The insertion loss in the passband is less than 1.2 dB, the return loss is better than 20 dB, and two 00:00 transmissions are generated on both sides of the passband. In order to further verify the performance of the filter, the filter is fabricated based on the single-layer PCB process. The test results show that the structure can reduce the size of the filter, which is more conducive to the miniaturization of the device, at the same time, it can effectively reduce the radiation loss and make the attenuation of both sides of the passband better. The frequency selectivity of the filter is improved. In Chapter 4th, a novel controllable hybrid electromagnetic coupling structure is proposed based on SIW technology and single-layer PCB processing technology. The structure realizes magnetic coupling through the inductive window between two SIW resonators. The strength of the electrical coupling is adjusted by the size of three symmetrical slots etched on the top metal of the resonator. A third order filter with quasi-elliptic function response is designed and fabricated by simulation. The simulation and test results show that the filter has low insertion loss, high selectivity, wide stopband, and can flexibly adjust the position of 00:00 transmission. Easy plane integration and other advantages.
【学位授予单位】：信阳师范学院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN713

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