| 摘要 |
A slow wave circuit ( 10, 110 ) of a traveling wave tube includes a three-dimensional conductive structure ( 30, 130 ). A dielectric film ( 36, 136 ) coats selected portions of the three-dimensional conductive structure ( 30, 130 ). An outer housing ( 12, 14, 112, 114 ) surrounds the three-dimensional conductive structure ( 30, 130 ) . The outer housing ( 12, 14, 112, 114 ) includes interior surfaces that connect with the dielectric film ( 36, 136 ). In a method for generating or amplifying microwave energy, a three-dimensional conductive structure is laser micromachined to define a selected generally periodic pattern thereon. The conductive structure is arranged inside a generally hollow barrel. An electron beam passes through the generally hollow three-dimensional structure and interacts with the conductive structure and the generally hollow barrel to generate or amplify the microwave energy.
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