786 



BELL SYSTEM TECHNICAL JOURNAL 



susceptance controlling network of the high-pass filter at the paralleled 

 end is composed of the coil and condenser in series across the input 

 terminals and the susceptance of the low-pass filter; at the other end 



1.03 



o 



N 



O 



1.02 



1.0 I 



Z 1.00 



o 



Q 0.99 



z 

 o 

 o 



098 



0.97 



0.03 



002 



01 



o 



< 



Q. 



■0.01 O 



10 

 10 



-0.02 



-003 



0.1 0.2 0.3 04 0.5 0.6 0.7 0.8 0.9 1.0 



X 



Fig. 16 — Typical image impedance characteristic of a 3-branch termination 



(Fig. 12-C). 

 I — Real Component. 

 II — Imaginary component. 



« -ft 



10 



12 



14 16 18 20 22 24 



FREQUENCY IN CYCLES PER SECOND 



26 



26 



Fig. 17 — Schematic and reflection coefficient of a high-pass filter with 3-branch 



terminations. 



of the high-pass filter the three-element two-terminal network controls 

 the susceptance. The conductance controlling sections at either end 

 are composed of the first series condenser and the first shunt coil and a 



