388 



BELL SYSTEM TECILMCAL JUlRSAL 



. I 



EQUIVALENT CIRCUIT 



Kc|uati()iis: 

 Terminalions: 



ii%i + h{%2 + Zn) = 



Zn = Zj- = -%, + i(?u + ?-a)(l + \/l ^ 

 Z,, = Zo = -?u + hC^n + %,)i\ + Vl - .v) 



Circuit cietcrminanl A = ^(?u + ?i2)-(l — v + Vl — 3') 



i %i 2 ;2 



Insertion Power Gain G; = —-■ , : 



Fig. 20 — Sj'nopsis of iterated cascade of four-poles. 



EQUIVALENT CIRCUITS 



V:i ^^^TJl 



(-) 



(2) 



Equations: /i(?ii + Zq) + i'l'^vilf = ''g 

 h%xlf^ iA—^zA = 



■Zl 



Fig. 21 — Four-i)olo willi ideal transformer. 



