Studying High-Power Miniature Millimeter-Band Tubes with Sheet Electron Beam

Development of short-wavelength millimeter-band electron devices is of great importance. Compact, portable sources with power of 10–100 W are promising for application in novel wireless communication systems, space communications, high-resolution radar, non-destructive evaluation and testing, and other numerous applications. In this paper, we present the results of development of O-type traveling-wave tube (TWT) and backward-wave oscillator (BWO) with sheet electron beam. Staggered double grating slow-wave structure (SWS) for a W-band TWT is designed and simulated. The results of 3-D particle-in-cell (PIC) simulation of hot-test TWT operation are presented. Truncated sinusoidally-corrugated waveguide SWS for a Vband BWO is also designed and simulated. Microfabrication of the SWSs by using high-precision computer-numerical control micromilling is discussed.