Asymmetrical slow wave structures to eliminate backward wave oscillations in wideband traveling wave tubes

摘要

In various embodiments, a traveling wave amplifier circuit is disclosed. The traveling wave amplifier circuit is configured to receive an RF wave and an electron beam. The traveling wave amplifier effects synchronized interaction between the RF wave and the electron beam. The traveling wave amplifier circuit comprises a waveguide. The waveguide comprises a plurality of asymmetric cells arranged periodically. The waveguide is configured to receive an electron beam. Each of the asymmetric cells comprises at least one asymmetrical structure within the asymmetric cell to modify the dispersion relation of the waveguide.

主权项

1. A traveling wave amplifier circuit to receive an RF wave and an electron beam and to effect synchronized interaction therebetween, the circuit comprising:
a waveguide comprising a plurality of asymmetric cells arranged periodically along an axis of propagation, wherein the waveguide is configured to receive an electron beam along the axis of propagation, and wherein each asymmetric cell comprises at least one asymmetrical structure within the asymmetric cell to modify the dispersion relation of the waveguide to prevent backward-wave oscillation in the waveguide, wherein the at least one asymmetrical structure is asymmetric along the axis of propagation.