WIDE-BAND TRANSMISSION OVER COAXIAL LINES 



663 



300 400 500 600 700 



FREQUENCY IN KILOCYCLES PER SECOND 



Fig. 7 — Attenuation frequency characteristics of coaxial and other circuits. 



7 shows the high-frequency attenuation of two sizes of coaxial circuit 

 using copper tube outer conductors, of .3 inch and 2.5 inch inner diame- 

 ter, and that of cable and open-wire pairs in the same frequency range. 



Effect of Eccentricity 



The small effect of lack of perfect coaxiality upon the attenuation 

 of a coaxial circuit is illustrated by the curve of Fig. 8, which shows 



