回旋行波管冷测校准系统中的去嵌入研究

发布时间：2018-04-16 00:13

本文选题：模式变换 + 校准系统　；参考：《电子科技大学》2015年硕士论文

【摘要】：随着现代军事与科学研究的发展,对更高功率、更高频率以及更高能量的微波源的需求变的日益迫切。回旋行波管作为一种新型高功率微波器件,填补了毫米波及亚毫米波段大功率器件的空白,且由于其高峰值功率、高平均功率、高增益和高效率的特点,作为微波通信及电子对抗、毫米波雷达等系统的功率源,是其他器件所无法比拟的,因而受到了广泛的重视。在微波测量的过程中,模式变换能使微波源的能量进行有效地传输与变换,具有非常重要的研究价值和应用价值。基于模式变换的重要性,本文对用于冷测的Q波段矩形波导TE10-圆波导TE01模式变换器进行了深入的理论研究和仿真模拟,总结了该类模式变换器的设计方法,并应用于教研室的科研领域中。此外,本文开展了大量的实验性的工作,以回旋器件中的输出窗与输入耦合器为例,对微波测量去嵌入技术进行了分类与总结。本论文的主要工作如下:1.对高功率微波技术的发展与应用及回旋管的提出与分类进行了系统的概述。对回旋管器件(输出窗和输入耦合器)的重要作用进行了简要阐述。对低功率冷测用模式变换器和去嵌入技术的研究现状和研究方法进行了系统的论述。2.系统的研究了十字交叉型模式变换器的设计原则与设计规律。3.从微波测量理论中的校准理论入手,引出了微波器件的去嵌入技术。详细说明了矢量网络分析仪误差产生的来源及其校准步骤,比较分析了不同的去嵌入技术。对微波器件的去嵌入技术进行了系统的概述,阐述了对模式变换器这类波导夹具实施去嵌入的必要性与重要性。4.对Q波段矩形波导TE10-圆波导TE01模式变换器进行了分段仿真优化,并对其关键几何尺寸的微小变化对转换效率的影响进行了分析。从等效电路的角度分析了谐振问题,优化改进了模式变换器的结构。通过不同软件的仿真验证,得到了一支超宽带、高转换效率的Q波段十字交叉型模式变换器。5.简要论述了使用网络分析仪的注意事项,重点给出了回旋器件冷测去嵌入实验相应的测试原理、测试步骤和测试结果,并以输入耦合器和输出窗为例进行了验证。分别运用端口延伸、时域功能等方式实施去嵌入,比较去嵌入前后的结果,并与相应的仿真结果比较,以此验证去嵌入方法的准确性。
[Abstract]:With the development of modern military and scientific research, the demand for microwave sources with higher power, higher frequency and higher energy becomes more and more urgent.As a new type of high power microwave device, cyclotron fills up the gap of millimeter wave and submillimeter band high power devices, and because of its high peak power, high average power, high gain and high efficiency.As the power source of microwave communication and electronic countermeasure, millimeter wave radar and other systems can not be compared with other devices, so it has received extensive attention.In the process of microwave measurement, mode transformation can make the energy of microwave source transmit and transform effectively, which has very important research value and application value.Based on the importance of mode transformation, a Q-band rectangular waveguide TE10- circular waveguide TE01 mode converter for cold measurement is studied and simulated, and the design method of this kind of converter is summarized.And applied in the research field of the teaching and research department.In addition, a lot of experimental work has been carried out in this paper. Taking the output window and input coupler in gyrotron as examples, the technique of microwave measurement de-embedding is classified and summarized.The main work of this thesis is as follows: 1.The development and application of high power microwave technology and the proposal and classification of gyrotron are summarized systematically.The important role of gyrotron devices (output window and input coupler) is briefly described.The research status and research methods of low power cold test mode converter and de-embedding technology are systematically discussed in this paper.The design principle and design rule of cross mode converter are studied systematically.Based on the calibration theory of microwave measurement theory, the de-embedding technology of microwave device is introduced.The error source and calibration steps of vector network analyzer are explained in detail, and different de-embedding techniques are compared and analyzed.This paper gives a systematic overview of the de-embedding technology of microwave devices, and expounds the necessity and importance of deembedding the waveguide clamps such as mode converters.The Q-band rectangular waveguide TE10- circular waveguide TE01 mode converter is optimized by segmental simulation, and the influence of the small change of its key geometry on the conversion efficiency is analyzed.The resonance problem is analyzed from the point of view of equivalent circuit, and the structure of mode converter is optimized.A Q-band cross mode converter with high conversion efficiency and ultra-wideband (UWB) has been obtained by simulation with different software.This paper briefly discusses the matters needing attention in the use of network analyzer, and puts emphasis on the corresponding test principle, test steps and test results of the cold test de-embedding experiment of the gyroscope. The examples of the input coupler and output window are given for verification.The port extension and time domain function are used to implement de-embedding respectively. The results before and after de-embedding are compared and compared with the corresponding simulation results to verify the accuracy of the de-embedding method.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN124;TN624

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