426 



BELL SYSTEM TECHNICAL JOURNAL 



X, regarded as a function of r, has a maxinuiin witliiii tlif trans- 

 mitting band (0</-<l) is 



{V2- 1)/2\/2 < (T < (\/2+ 1)/2\/2, 



that is, approximately, 



0.14G<<r< 0.854. 



For values of a outside of this range, X has no maximum within 

 the transmitting band; but X has then its largest value at r=0, 

 decreasing from 1 at r = to at r = \. When a = 1/2, Crit. r = l; 



"0 .2 .4 .6 .8 1.0 1.2 1.4 



Fig. 4 — Components of the a-Section Rtl.itivc Impt-dancc /. =A' + jK 



