The extended interaction device is a major category of millimeter-wave electronic vacuum tube. The study found that the extended interaction oscillator ( EIO) is well suited to work in the millimeter wave band, and now becomes one important type of High power millimeter-wave devices. 扩展互作用器件是一类重要的毫米波电真空器件,经研究发现扩展互作用振荡器(EIO)十分适合工作在毫米波波段,目前已经发展成为一类重要的大功率毫米波器件。