184 



BELL SYSTEM TECHNICAL JOURNAL 



frequency. For the two modes in which adjacent resonators are in phase 



N 

 {n = 0) and tt radians out of phase (n= -, the so-called tt mode), however, 



only standing potential waves on the anode are possible. As examples of 



t + 2/4 T 

 t + 3/4 T 

 t + 4/4 T 

 t ■^ 5/4 T 

 t + 6/4 T 

 t + 7/4 T 

 t + 8/4 T 

 t+ 9/4 T 

 t + 10/4 T 

 t + 11 /4 T 

 t + 12/4 T 

 t + 1 3/4 T 

 t-f 14/4 T 

 t + 15/4 T 

 t + 16/4 T 

 t + 1 7 /4 T 

 t + 18/4 T 

 t + 1 9 /4 T 

 t+20/4 T 



m 



a \^ 



^ m 



o 



mmmMv.' 



+ 1 /4 T V\ " ^, 



^ir^V,^^^ . 





\ \ 



\ / ^V^ ^ 



'. \ ^ \ — =z=^ — 



'AT, \ i^^ =\ 



— ^ ^ ^ ^T 



'^ '^:^^-^' 



\a_^^ — \ 



/r~\ ^ 



Fig. 10. — A plot similar to that of Fig. 9 for the standing wave component of anode 



potential of periodicity « = 2 in a magnetron having eight resonators. Electrons which 



. , , , , .... 2-n-f Ivf 2irf 2irf 



mteract favorably have mean angular velocities — , — , -rrr, -rj, 

 in the interaction space. 



in either direction 



standing and traveling anode potential waves in an anode structure having 

 eight resonators {N = 8), the standing wave for w = 4 and standing and 

 traveling waves for n = 2 are shown in Figs. 9, 10, and 11 respectively. 



From what has been said about the RF field and the electronic motion in 

 the interaction space of the magnetron oscillator of T}TDe III, it is possible 



