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The development of the electrically controlled high power RF switch and its application to active RF pulse compression systems.

机译：电控大功率射频开关的开发及其在有源射频脉冲压缩系统中的应用。

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摘要

In the past decades, there has been increasing interest in pulsed high power RF sources for building high-gradient high-energy particle accelerators. Passive RF pulse compression systems have been used in many applications to match the available RF sources to the loads requiring higher RF power but a shorter pulse. Theoretically, an active RF pulse compression system has the advantage of higher efficiency and compactness over the passive system. However, the key component for such a system---an element capable of switching hundreds of megawatts of RF power in a short time compared to the compressed pulse width---is still an open problem.;In this dissertation, we present a switch module composed of an active window based on the bulk effects in semiconductor, a circular waveguide three-port network and a movable short plane, with the capability to adjust the S-parameters before and after switching. The RF properties of the switch module were analyzed. We give the scaling laws of the multiple-element switch systems, which allow the expansion of the system to a higher power level.;We present a novel overmoded design for the circular waveguide three-port network and the associated circular-to-rectangular mode-converter. We also detail the design and synthesis process of this novel mode-converter.;We demonstrate an electrically controlled ultra-fast high power X-band RF active window built with PIN diodes on high resistivity silicon. The window is capable of handling multi-megawatt RF power and can switch in 2-300ns with a 1000A current driver. A low power active pulse compression experiment was carried out with the switch module and a 375ns resonant delay line, obtaining 8 times compression gain with a compression ratio of 20.
机译：在过去的几十年中，人们越来越关注用于构建高梯度高能粒子加速器的脉冲高功率射频源。无源RF脉冲压缩系统已用于许多应用中，以将可用的RF源与需要较高RF功率但脉冲较短的负载相匹配。从理论上讲，有源RF脉冲压缩系统比无源系统具有更高的效率和紧凑性。然而，这种系统的关键部件-与压缩脉冲宽度相比，能够在短时间内切换数百兆瓦射频功率的元件-仍然是一个悬而未决的问题。开关模块由一个基于半导体中的整体效应的有源窗口，一个圆形波导三端口网络和一个可移动的短平面组成，能够在开关之前和之后调整S参数。分析了开关模块的RF特性。我们给出了多元件开关系统的缩放定律，这允许将系统扩展到更高的功率水平。我们为圆波导三端口网络和相关的圆角矩形模式提出了一种新颖的过调制设计-转换器。我们还详细介绍了这种新型模式转换器的设计和合成过程。我们演示了在高电阻率硅片上建立有PIN二极管的电控超快大功率X波段RF有源窗口。该窗口能够处理数兆瓦的RF功率，并可以使用1000A电流驱动器在2-300ns内切换。使用开关模块和375ns谐振延迟线进行了低功率有源脉冲压缩实验，以20的压缩比获得8倍的压缩增益。

著录项

  • 作者

    Guo, Jiquan.;

  • 作者单位

    Stanford University.;

  • 授予单位 Stanford University.;
  • 学科 Physics Electricity and Magnetism.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 148 p.
  • 总页数 148
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 电磁学、电动力学;
  • 关键词

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