Double-Gap Multiple-Beam Resonator with a Higher Order Mode

Numerical investigation results of the ten-beam double-gap resonator design with a 2/1 frequency relation between 3π and 2π oscillation modes are described. Dimensions of the considered resonator were chosen to provide a frequency of a 2π mode to be equal 30 GHz. Characteristic impedance, gap coupling coefficient and relative electronic conductivity are found for chosen oscillation modes. The traversal through the considered resonator by the un modulated electron beam was investigated. It is shown that with the input signal of f
_in
≈ 30 GHz frequency and 2/1 relation factor between 3π and 2π modes frequencies, the frequency of electron bunches on the resonator output is doubled and equals 2f
_in
.