Asymmetrical slow wave structures to eliminate backward wave oscillations in wideband traveling wave tubes
AssigneeTeledyne Wireless, LLC
InventorsYehuda G. Goren, Tong Chen
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Abstract
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.
Claims19
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.
A traveling wave tube amplifier 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 of the plurality of asymmetric cells comprises at least one asymmetrical structure therein, thereby forming a plurality of asymmetrical structures along the axis of propagation to modify the dispersion relation of the waveguide, wherein each of the plurality of asymmetrical structures is asymmetric along the axis of propagation;
- an electron beam input device configured to generate an electron beam in the waveguide, wherein the waveguide is configured to slow a wave velocity of an input radiofrequency beam to match an input velocity of the electron beam, and wherein the asymmetrical structure is configured to eliminate the backward wave oscillation of the radiofrequency beam within the waveguide.
Dependencies are inferred from the claim text.