40 



BELL SYSTEM TECHNICAL JOURNAL 



R is the ratio of tlie stored energies, and hence of the power flows (since 

 the waves both propagate with the speed of Hglit) of a developed helically- 

 conducting sheet and a developed helix with the same distant traveling fun- 

 damental field com{)onents. Hence, at a given distance (Er/0-Py^^ for the 

 helix is R^'^ times as great as for the helically conducting sheet. In Fig. 

 3.13, /?'/•' is plotted vs. d/p. 



1 0.2 0.3 0.4 5 0.6 0.7 0.8 0.9 1.0 



d/p 



Fig. 3.13 — Ratio R^'^ of {E^/0^PY'^ for a helix to the value for a helically conducting 

 sheet for the distant field. 



d/p 



Fig. 3.14 — Ratio R^'^ of {E^/0^Py'^ for a helix to the value for a helically conducting ^ 

 sheet, field at the inside diameter of the helix or sheet. 



