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BELL SYSTEM TECHNICAL JOURNAL 



from to 0, through finite intervening vahies. In the odd attenu- 

 ating bands it ranges from — /oo to —iO; and in the even attenuating 

 bands it ranges from -|-/0 to +/20. 



In the first transmitting band, Z' o ranges from 1 to 0, but in all of 

 the other transmitting bands it ranges from =0 to 0. In all of the 

 attenuating bands it ranges from -\-iO to +f^- 



These facts are illustrated by Fig. 8, which gives graphs of Z i, and 

 Z'.s over a range of three compound bands, as functions of r=f/fi = 

 D/D\, with X = 0.12; also with \ = 0, for comparison. On the scale 

 there used, the curves for the two values of X are indistinguishable 



'''b18— Mill-Section Relative Impedance 7, ,i = X j,-\-iY ,, and Mid-Lo.id Relative 

 .^Li. Impedance Z' _i=X' ,,, -|->K'.ii Over a Range of Three Compound Bands 



