An Extended Interaction Oscillator Capable of Continuous Multimode Operation

A nine-gap extended interaction oscillator (EIO) circuit capable of continuous multimode operation is proposed to overcome the continuous electronic tuning range limitation of the conventional single-mode operation EIO circuit. Circuit analysis shows that it has the capability of stable continuous mode switching between multiple operating modes with the sweeping operating voltage. Particle-in-cell simulation shows that a continuous mode switching between the
$\pi $
/8 mode and the
$2\pi $
mode is achieved with a continuous electronic tuning range of 95.50–96.23 GHz. Working mechanism of the continuous multimode operation is preliminary studied by the “cold cavity” and “hot cavity” analysis.