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业已对高增益回旋行波放大器进行实验研究。在实验中,观察到纯线性增益超过50分贝,该实验是在35千兆赫下的TE_(01)圆电模式上进行的。为了克服在输入和输出耦合器上的反馈而引起的不稳定性,以及由于电子注耦合到反向行波上的反馈造成的绝对不稳定性,需采用电阻壁波导。应用了电压为70千伏、垂直速度分量与平行速度分量之比为1.5的环形电子注,其电流高达3安培。采用损耗壁的另一优点是能使频宽得以改善,实验工作已证实了计算结果。损耗壁也会导致增益的降低,其值大约是管子冷损耗的1/3,这就意味着,获得这种稳定性,并不会严重地影响增益。
Experiments have been conducted on high gain gyroscope traveling wave amplifiers. In the experiment, a purely linear gain of more than 50 dB was observed, which was performed on a TE01 (01) circular electrical model at 35 GHz. In order to overcome the instability caused by the feedback on the input and output couplers and the absolute instability due to the feedback of the electron injection to the backward traveling wave, a resistive wall waveguide is required. A ring electron injection with a voltage of 70 kV and a ratio of vertical to parallel velocity components of 1.5 was used with current up to 3 amps. Another advantage of using lossy walls is that the bandwidth can be improved. The experimental work has confirmed the calculation results. Loss walls also result in a gain reduction of about one-third of the tube's cold loss, which means that gaining this stability does not seriously affect the gain.