702 



THE BELL SYSTEM TECHNICAL JOURNAL, JULY 1951 



effect of an 0.08 mil known deviation in diameter of the wire was detectable 

 in coaxials with otherwise perfect symmetry. Such deviations in symmetry 

 as were observed developed primarily from variations in wire diameter as 

 already stated, and from deviations in wall thickness of the copper tubing. 



1.0 

 03 

 0.6 



0.4 

 S 0.2 



0,1 



o 



I 0.08 

 S 0.06 



^ 0.04 



0.01 





0.02 0.04 0.06 0.1 



0.2 0.4 0.6 1.0 2 4 6 8 10 20 



FREQUENCY IN MEGACYCLES PER SECOND 



40 



Fig. 7— Distributed resistance, R, and R' component of Z^h of 7.0 ft. length, coaxial 



impedance standard. 



X 



Oo 

 a. " 

 o 



70 



0.65 



UJ 



^O 

 o 



2 



0.50 



0.1 



0.3 0.4 0.6 0.8 1 2 3 4 6 8 10 



FREQUENCY IN MEGACYCLES PER SECOND 



Fig. 



8— Distributed inductance, L, and L' component of Zsh of 7.0 ft. length, coaxial 

 impedance standard. 



Numerical Valines of Standard Impedances 



Graphical Example 



As an example, values for the apparent series and shunt primary con- 

 stants R', L', G' and C for a length of 7.0 feet are presented graphically 

 in Figs. 7-10. For comparison, the distributed primary constants have also 



