Characteristics of Electric Field Distribution in a G-band Overmoded Extended Interaction Oscillator

One kind of G-band extended interaction oscillator (EIO) with rectangle cavity model which works on 220 GHz is simulated with CST Eigenmode Solver [1]. The influences of the structural parameters of the cavity on the electric field characteristics, including the gap length and the extension length of the coupling cavity, were simulated and analyzed. In addition, the field distribution, coupling impedance and beam-loaded conductance of the EIO are derived.