Dr. Heather SongSadiq Ali H Alhuwaidi2022-06-012022-06-0135784https://drepo.sdl.edu.sa/handle/20.500.14154/539063D MODELING, ANALYSIS, AND DESIGN OF A TRAVELING-WAVE TUBE USING A MODIFIED RING-BAR STRUCTURE WITH RECTANGULAR TRANSMISSION LINES GEOMETRYThesis