974 THE BELL SYSTEM TECHNICAL JOURNAL, JULY 1954 



-7 



-6 



■a. 



C^ -3 



-2 



0.2 0.4 0.6 0.8 1.0 



ToPo COT 1// 



Fig. 12(c) — See Fig. 12. 



1.4 



1.6 



4.5 

 4.0 

 3.5 

 3.0 

 2.5 

 2.0 

 1.5 

 1.0 

 0.5 

 



0.8 



Fig. 13 — Reduced forward and reverse propagation constants versus a for 

 various reduced radii of a cylindrical helix. (Loss free case). The region 

 1 — p < o- < o-o is omitted, (a), above, p = 0.2. (b) p = 0.4. (c) p = 0.6. (d) p 

 = 0.8. (e) p = 1.0. 



