1192 THE BELL SYSTEM TECHNICAL JOURNAL, SEPTEMBER 1954 



chosen for each pattern according to the fol]o\\-ing considerations. For 

 large | <r | the amphtudes should tend to those of the isotropic case; for 

 I 0- j < o-Q the amphtudes should develop with increasing | a \ away from 

 the isotropic amplitudes. Thus, if the phase of the isotropic amplitudes 

 is first fixed, that of all the others may be fixed by the conditions that 



TRANSVERSE H-FIELD 



TRANSVERSE E-FIELD 



TE„-LIMIT MODE 



cr = 0.6 



P = 0.6 



5.75 5 

 To 



3 2 



RADIUS 



Fig. 10 — Transverse field patterns in a rotating system for four particular 

 cases of Fig. 9. For any pair of E and H patterns the length of the arrows is propor- 

 tional to field strength, but the patterns for different cr-values have not been 

 given a common normalization, (a), top, TEn-limit mode, a = 0.6, p = 0.6; (b), 

 bottom, TEu-limit mode, o- = -0.6, p = -0.6; (c), TMu-limit mode, a = 0.6, 

 p = 0.6; and (d), <r = -0.3, p = -0.6. 



