CABLE CROSSTALK 



185 



(J 75 



0°i 



WIRE 

 IAN/1ETERS = 

 .0912 CM 



K0.I825CM*! 

 A FREQUENCY=56 KILOCYCLES PER SECOND 



A' 



B 



B' 







WIRE DIAMETER WIRE DIAMETER WIRE DIAMETER 



Fig. 2 — Phase shift in parallel 19-ga. wires. 



phase quadrature with the total disturbing current, J, and the mutual 

 impedance was equal to jojikT, a pure imaginary. For unsymmetrical 

 current distribution in the disturbing conductor, the following dis- 

 cussion shows that the induced voltage can no longer be exactly in 

 phase quadrature with the disturbing current and that the mutual 

 impedance is complex. 



The total voltage induced in a disturbed filamentary wire by the 

 total current flowing in a solid wire is the vector sum of the induced 

 voltages due to all of the currents in the various filaments of the 

 disturbing wire. Thus, if ii, h, iz, ' • ■ in are the vector currents in the 

 .various filaments of the disturbing wire and if mi, m<i, ms, - • • m„ are 

 the corresponding coefficients of mutual inductance between each of 

 these filaments and the disturbed filamentary wire, the total induced 



