WAVE PROPAGATION 



549 



Fig. 3 (2 = imaginary part of J 



IV 



The theory and formulas of the preceding sections will now be 

 reviewed and summarized as regards their principal applications to 

 technical transmission problems where the ground forms, in whole 

 or part, the "return" part of the circuit. In such problems we are 

 interested in the electric intensit}' in the dielectric and in the ground, 

 and in particular in the self impedance and mutual impedances of 

 ground return circuits. The calculation of these quantities is pro- 

 vided for by the general analysis and the solution of the infinite 

 integral J. Reference should be made to Fig. 1 shown in section I 

 for the geometry of the system and coordinate system employed. 



1. The Axial Electric Intensity E^ in the Dielectric. 

 (15) and (18) ). 



(See equations 



E,= -^V-{i2c, log (p'Vp') +4a;/)7 



