An Extended Interaction Oscillator Capable of Continuous Multimode Operation

Abstract

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 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\pi $ </tex-math></inline-formula> /8 mode and the <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$2\pi $ </tex-math></inline-formula> 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.