Higher Order Mode Generation for Gyrotron Using Fundamental Mode

The contribution of this paper is to propose a higher order mode generation for gyrotron using fundamental mode. The proposed structure aerates two higher order modes
$- \text{TE}_{6,2}$
and TE 10,1 because their first kind of Bessel function values is almost equal. The
$\text{TE}_{6,2}$
mode is very useful for gyrotron amplification, whereas
$\text{TE}_{10,1}$
is an undesired higher-order mode. We suppressed the TE
10,1
mode by properly loading high conductive wire.