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摘要随着通信、电子对抗、雷达等技术的不断发展，系统对高功率、高性能、低损耗的要求与日俱增。由于功率限制的原因，单个固态器件很难满足要求，因此功分器（微波功率分配器）是一种极其重要的微波无源器件。由于具有损耗小，功率容量大等优点，基于波导传输结构的功分器在高功率场合得到了广泛的应用。但是波导的体积和重量往往较大，不能满足人们对雷达、通信系统隐蔽性、紧凑性的要求。
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本文从改进和优化波导功分器的结构出发，对脊波导功分器进行了仿真研究。首先对脊波导功分器进行了理论分析，设计一种脊波导T形功分结构，该结构在输入端引入阶梯，并在在分支波导加感性膜片。通过HFSS仿真软件仿真分析了感性膜片的长宽（L、W）、引入阶梯的长宽（L0、W0）等变量对T形分支结构匹配效果的影响。通过调节感性膜片的位置，来控制分支端功率比，利用HFSS仿真设计了分支端口功率比为1:1、1:2、1:3、1:4等的结构，在8-12Ghz频带范围内匹配，回波损耗小于-20dB，信号波动小于0.05dB。以此结构为基础设计了一分四功分器，频率范围为9Ghz-11Ghz，回波损耗小于-20dB；一分751功分器率范围为9Ghz-9.6Ghz，回波损耗小于-21dB。21815
关键词：脊波导、功分器、HFSS
毕业论文设计说明书（论文）外文摘要
Title Simulation Study of Ridge Waveguide Power Divider
Abstract
With the development of communications, electronic warfare, radar technology and so on, Demands for high power, high performance and low loss of the system are growing with each passing day. While a solid state power devices are difficult to meet the requirements because of power limit, Power pider (microwave power pider) is an essential kind of microwave passive devices. The power pider based on waveguide structure has the characteristics of low loss and large power capacity, so it is widely used in high power applications. However, the volume and weight of waveguide are often too large to meet people’s requirements of concealment and compact in radar and communication system.
This article researches the simulation of ridge waveguide power pider to improve and optimize the structure of waveguide power pider. Firstly, I analyze the ridge waveguide power pider in theory and design Tee junction with a ridge waveguide structure. The structure lead step into input and add inductive diaphragm in the branch waveguide. Secondly, I simulate and analysis the T branch structure matching effects of the length and width of inductive diaphragm (L, W), the length and width of the step (L0, W0) and other variables by simulation software. Lastly, I use HFSS simulation to design the branch port with power ratio of 1:1, 1:2, 1:3, 1:4 and more by adjusting the inductive iris location to control the branch end power ratio. Matching in the frequency range of 8-12Ghz, the return loss is less than 20dB, signal fluctuation is less than 0.3dB. Based on this structure, a four-stage power pider is designed with the frequency range of 9Ghz-11Ghz, the return loss less than-20dB; a six-stage power pider is designed with the frequency range of 9Ghz-9.6Ghz, the return loss less than -21dB.
Key word：ridge waveguide、power pider、HFSS
目次
1. 绪论 1
1.1 研究背景 1
1.2 国内外研究概况 1
1.3 本文主要研究内容 2