Couplers for extracting RF power from a gyrotron cavity directly into fundamental mode waveguide

摘要

In a gyrotron cavity resonator, generated energy is extracted into a symmetric set of fundamental-mode waveguides (34) by ports (30, 32) disposed to couple energy in phase from the operating electromagnetic mode but in anti-phase with respect to an unwanted mode of lower cutoff frequency than the operating mode, thereby neutralizing coupling to the unwanted mode. A second set of interspersed ports may be disposed to load degenerate, orthogonal modes.