Current Location:home > Browse

1. chinaXiv:202001.00047 [pdf]

Review of the high-power vacuum tube microwave sources

徐伟业
Subjects: Electronics and Communication Technology >> Electron Technology

Since the first vacuum tube (X-ray tube) was invented by Wilhelm R?ntgen in Germany, after more than one hundred years of development, the average power density of the vacuum tube microwave source has reached the order of 108 [MW][GHz]2. The maximum power density record was created by the Free Electron Lasers. In the high-power microwave field, the vacuum devices are still the mainstream microwave sources for applications such as scientific instruments, communications, radars, magnetic confinement fusion heating, microwave weapons, etc. The principles of microwave generation by vacuum tube microwave sources include Cherenkov or Smith-Purcell radiation, transition radiation, and Bremsstrahlung. In this paper, the vacuum tube microwave sources were reviewed in order according to the three radiation principles. Among them, the Vircators can produce 22 GW output power in P-band. Vacuum tubes that can achieve continuous-wave operation include Traveling Wave Tubes, Klystrons, Free Electron Lasers, and Magnetrons, with output power up to 1MW. Vacuum tubes that can generate frequencies of the order of 100 GHz and above include Klystrons, Traveling Wave Tubes, Gyrotrons, Backward Wave Oscillators, Magnetrons, Surface Wave Oscillators, Free Electron Lasers, Orotrons, etc. Gyrotrons are very attractive in the millimeter wave and THz fields. The Gyrotrons can output power at the MW level with 3000s pulse width at millimeter wavelengths.

submitted time 2020-01-06 Hits4285Downloads258 Comment 0

2. chinaXiv:201702.00158 [pdf]

毫米波检波二极管特性与检波原理

徐伟业
Subjects: Physics >> Interdisciplinary Physics and Related Areas of Science and Technology

毫米波检波二极管是用于回旋管功率实时监测的重要器件,本文对二极管特性进行了讨论。通过对二极管特性的分析,给出了二极管模型参数的简易获得方法,极大的方便了二极管测试,并可以通过测试的结果建立二极管等效电路模型,以便进行检波器的设计。本文利用泰勒展开分析了二极管小信号检波原理,利用二极管折线模型分析了二极管大信号检波原理;并从二极管电流电压特性方程出发,推导了小信号和大信号检波原理。本文系统地分析了二极管检波原理,提出了二极管模型参数提取方法,为检波电路的设计提供了依据。

submitted time 2017-02-16 Hits2903Downloads1727 Comment 0

  [1 Pages/ 2 Totals]