Demonstration of a W-band Kilowatt-level Continuous Wave Sheet Beam Traveling Wave Tube Interaction Circuit Design

The power capacity and thermal density of millimeter-wave and terahertz devices directly limit the ability to operate in continuous waves. Based on the proposed high-power slow-wave structure, a kW-level W-band sheet beam traveling-wave tube (SB-TWT) is demonstrated. PIC simulation shows that the maximum power is 1600W, and corresponding electronic efficiency is ~ 20%. The 3-dB bandwidth is 17 GHz from 85 GHz to 102 GHz. Thermal analysis shows that its power capacity is sufficient to support the continuous wave operation at an electronic transmission rate of not less than 93%.