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BELL SYSTEM TECHNICAL JOURNAL 



section impedances, giving a certain concreteness to the application of 

 the theorem, which may be valuable. Partly on this account, and 

 partly because periodic iterative impedances are in themselves useful 

 in applications, a particular type of periodic network is considered in 

 this section. 



The network considered is infinite in extent, with section series 

 impedances Zi, z^ and 012 and shunt impedance Z3, as shown on Fig. 2 A. 



A . Network Diagram 



B. Network Impedances Zabud 



C. Current Distribution 



Fig. 2 — Periodic ladder network of infinite extent; network diagram, impedances and 



current distribution. 



The infinite network is the simplest to formulate since there are no 

 points of reflection; it is of course symmetrical with respect to the 

 terminal pairs 1, 2 and 3, 4. 



