微波输能窗理论与设计

发布时间：2018-01-15 16:08

本文关键词：微波输能窗理论与设计　出处：《电子科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：微波输能窗是微波电真空器件的重要组成部分。输能窗除了能保证微波电子器件工作在真空条件下外,还要在保证在反射尽量小的情况下使微波能够顺利地输入与输出,同时避免管内震荡的产生。盒型窗具有结构简洁、工艺成熟、冷测带宽较宽等优点,加之窗片表面电场较弱,峰值功率承受能力强,在结构上易于冷却,在行波管、磁控管、回旋管、速调管和加速器等领域得到了广泛使用。在以往对盒型窗的研究中,大多是针对陶瓷窗片进行设计和仿真,本文将主要从蓝宝石和CVD金刚石窗片出发进行讨论和仿真设计,同时对各种窗片材料做了归纳、分析和比较。在输能窗结构上大部分学者仍采用的是经典盒型窗结构,但也有学者在盒型窗中加入感性膜片以达到匹配,还有学者采用具有截止波导的盒型窗结构和具有渐变结的窗结构。在本文中采用突变结盒型窗结构分析等效电路理论,并在使用蓝宝石情况下对等效电路进行了拓展讨论。本文仿真设计了蓝宝石材料和金刚石材料窗片输能窗以及太赫兹频段的输能窗。经过设计仿真发现,蓝宝石和金刚石适合于高频段的盒型窗要求。本文的工作包括以下几个部分:对盒型窗的传统等效电路理论进行了分析和推导,并在蓝宝石作为窗片材料的情况下对盒型窗等效电路理论做了延伸讨论。系统地列举并比较了各种窗片材料,重点论述了蓝宝石和CVD金刚石的结构及其特点,分析了功率和电压定义的阻抗比公式,对传统理论进行了有益的归纳和补充。在越来越多学者选择窗片材料时逐渐倾向于宝石材料的形势下,对等效电路理论中宝石材料的分析和讨论具有一定的理论意义。分析和阐述了盒型窗中出现魔模的原因和避免方法,推导了窗片温升的计算公式。本文仿真设计了一款蓝宝石窗片盒型窗,并结合项目需要加工制作了样品并进行了测试,测试结果显示其性能满足项目需求。本文还仿真设计了一款W波段的CVD金刚石输能窗和一款频率为180GHz-220GHz的太赫兹输能窗,仿真结果说明CVD金刚石作为太赫兹窗窗片在理论上具有一定的可取性。
[Abstract]:Window is an important part of microwave vacuum devices. The microwave energy transmission window in addition to ensure microwave electronic devices work under vacuum conditions, but also in the guarantee in the reflection as small as possible situation that the microwave can easily input and output, while avoiding the shock tube. Box type window has simple structure. The cold test has the advantages of mature technology, wide bandwidth, and the window of the surface electric field is weak, the peak power capability, easy cooling in the structure, the traveling wave tube, gyrotron, magnetron, klystron and accelerators are widely used. In the past research on box type window, mostly for design and Simulation of ceramic window, the window of CVD sapphire and diamond are discussed and the simulation design, while a variety of window materials were summarized, analyzed and compared. The energy transmission window structure of large part of scholars still Use the box type window structure, but there are also scholars to join the perceptual diaphragm in box type window to achieve matching, there are scholars with box type window structure and cutoff waveguide with graded junction window structure. By mutation analysis of the equivalent circuit theory of junction box type window structure in this paper, and the use of sapphire in the situation the equivalent circuit for a discussion. In this paper, the sapphire material and diamond window energy transmission window and terahertz transmission window. Through the design simulation, box type window sapphire and diamond is suitable for high frequency requirements. The work of this paper includes the following parts: the theory of the traditional equivalent circuit of box type window are analyzed and deduced, and the sapphire as the window material box type window equivalent circuit theory of the extended discussion. Systematically lists and compares a variety of window materials, Discusses the structure and characteristics of sapphire and diamond CVD, analyzed the power and voltage defined by the impedance ratio formula, the traditional theories and the beneficial supplement. The choice of window material in more and more scholars tend to gem material situation, equivalence has certain theoretical analysis and discussion of gem materials. In the circuit theory. Analysis and explains the reasons for magic mold box type window and avoid method to deduce the calculation formula of window temperature rise. In this paper, a sapphire window box type window, and combined with the project needs to be processed samples and tested. The test results show that its performance meets the needs of the project. This paper also designed a CVD diamond W band energy transmission window and a frequency of 180GHz-220GHz THz energy transmission window, the simulation results show that CVD diamond as terahertz window The window film has a certain degree of desirability in theory.

【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】：TN103

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