Design of High‐Power, MM‐Wave Traveling‐Wave Tubes

Simulations have indicated that emerging electron sheet‐beam technology can drive simple rippled and stepped waveguide traveling‐wave tubes with extremely high gain. There are many design possibilities that need to be evaluated. The interaction can be made with the n=−1 (backward wave), n=0 (fundamental forward wave), or n=+1 (first space harmonic forward wave) interactions. In this paper, we discuss some of the fundamental design issues.