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本文介绍利用电子倍增放电效应的大功率微波开关的研制。这种开关能产生毫微秒的上升,恢复和开关的时间。这种器件是一个重入式的真空腔体,腔体中具有二个二次电子发射性能良好的电极。当加高频功率时,很强烈的二次电子倍增电流放电发生在电极之间,引起大部分的人射功率反射,这是器件的一种工作状态。一个电极是与另一个电极直流隔绝的,因而允许应用外部的控制电压。如果应用一个足够高的电压,那么,放电就消失。并且腔体作为一种被动的传输器件。因而另一个工作状态看作为一种传输器件。如果二个这样的元件是装置在二个三分贝的桥接岔路结之间,那么,形成具有二个输出接头结构的开关,这种工作在S波段和5兆瓦峰值功率的开关,在放电时对于不用端输出的隔离度为20分贝。工作于传输状态时的插入损耗为0.5分贝。由于这个放电发生在高真空中,所以没有消电离时间。放电迅速地按指数上升,因此,实际上在放电开始时,没有时间延迟,也没有波尖漏过的问题。文中同时也提到了在直流电压情况下,二发电子倍增放电理论研究的结果。
This article describes the use of electron multiplying discharge effect of high-power microwave switch development. This switch can produce nanosecond rise, recovery and switching time. This device is a reentrant vacuum chamber with two electrodes with good secondary electron emission properties. When the high-frequency power is added, a very strong secondary electron multiplication current discharge occurs between the electrodes, causing most people to reflect the reflected power, which is a working state of the device. One electrode is isolated from the other electrode by DC, thus allowing the application of an external control voltage. If a sufficiently high voltage is applied then the discharge disappears. And the cavity as a passive transmission device. So another working state as a transmission device. If two such components are mounted between two three-decibel bridge junctions, a switch with two output terminal configurations is formed. This switch operates in S-band and 5 MW peak-power at discharge For the end of the output isolation of 20 dB. The insertion loss when working in the transmission state is 0.5 dB. Since this discharge occurs in a high vacuum, there is no deionization time. The discharge rapidly rises exponentially, so that there is virtually no time delay at the beginning of the discharge and no problems with the tip leakage. In the meantime, the paper also mentions the result of the theoretical research on the second-generation electron multiplication and discharge under DC voltage.