一种毫米波分波器的设计

发布时间：2018-03-05 19:01

本文选题：毫米波　切入点：波导滤波器　出处：《安徽大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着科技的快速发展,微波无线通信系统在军用和民用产品中表现出了很重要的作用。无论你在哪里,我们每一个人都在使用无线电技术的设备,且这种趋势在不断增加。与此同时,频率资源也变得越来越紧张。在现代毫米波系统中,分波器有着非常广泛的用途,在卫星通信,毫米波辐射计,导航等很多领域都常用到。因此,设计出高性能、结构紧凑的分波器必然是未来分波器发展的必然趋势。分波器是一种将接收到的信号分为多个频率范围信号的微波器件。论文的主要工作是研究和设计出一种毫米波段通带不交叠的七通道分波器,这种分波器由七个带通滤波器和一分八等分功分网络组成。矩形波导具有损耗小、Q值高等优点,在微波毫米波电路和系统中获得广泛应用,能很好地适应毫米波系统对小型化要求,所以,分波器使用波导结构。利用电磁场仿真软件HFSS设计出符合设计指标的要求的滤波器与一分八等分波导功分网络,再完成对七通道毫米波分波器的设计。论文先介绍了分波器的相关理论,本次设计的滤波器为带通滤波器,所以着重介绍了电感膜片波导带通滤波器的设计。接着,论文介绍了一些常用于微波毫米波频段作为功分器的微波器件,包括波导魔T,波导T形结以及3dB分支波导耦合器。本次设计的一分八等分波导功分网络的各个输出端口需要一定的隔离度,用来降低毫米波分波器的各个滤波器通道间的相互干扰。考虑到四端口网络波导魔T两输出端口具有不错的隔离,因此采用多个波导魔T级联的方式设计一种2n型一分八等分功分网络。基于分波器要结构紧凑,利于实际加工的考虑,将波导魔T功分器的各输出端口朝同一方向进行90°打弯,使得功分网络的8个输出端口在同一侧。最后,通过实物测试来验证设计方法的可行性。将设计好的带通滤波器和功分网络连接在一起组成分波器,通过矢量网络分析仪测试后,得出分波器的设计基本满足了指标要求。
[Abstract]:With the rapid development of technology, microwave wireless communication systems have played a very important role in military and civilian products. Wherever you are, everyone of us is using wireless devices. And this trend is on the rise. At the same time, frequency resources are becoming more and more tight. In modern millimeter-wave systems, the divider has a very wide range of applications, in satellite communications, millimeter-wave radiometers, Navigation and many other areas are commonly used. Therefore, design high performance, A compact divider is bound to be an inevitable trend in the future. The divider is a microwave device that divides the received signal into multiple frequency range signals. The main work of this paper is to study and design a kind of millimeter. A seven-channel wave divider with non-overlapping passband in the meter-wave band, This kind of divider is composed of seven bandpass filters and one to eight equal power distribution networks. Rectangular waveguides have been widely used in microwave millimeter wave circuits and systems for their advantages of low loss and high Q value. It can well meet the requirement of miniaturization of millimeter wave system. Therefore, the wave divider uses waveguide structure. Using electromagnetic field simulation software HFSS, the filter and the power distribution network of one point and eight equal distribution waveguide are designed according to the requirements of the design index. Then the design of the seven-channel millimeter-wave divider is completed. Firstly, the related theory of the divider is introduced. The filter designed in this paper is a band-pass filter, so the design of the inductive diaphragm waveguide band-pass filter is emphasized. This paper introduces some microwave devices which are often used in microwave millimeter wave band as power divider. Including waveguide magic T, waveguide T-junction and 3dB branch waveguide coupler. It is used to reduce the interference between the filter channels of the millimeter-wave divider. Considering that the four-port network waveguide magic T two output ports have good isolation, Therefore, a 2n type of one-eight equal power distribution network is designed by using multiple waveguide magic T cascades. Based on the compact structure of the divider and the consideration of practical processing, the output ports of the waveguide magic T splitter are bent in 90 掳in the same direction. Finally, the feasibility of the design method is verified by physical test. The designed bandpass filter and power division network are connected together to form a wave divider. After testing the vector network analyzer, it is concluded that the design of the divider basically meets the requirements of the index.
【学位授予单位】：安徽大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN925;TN713;TN626

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