i.o.ini.D i.ixr.s .tM> ci>Mi'r..\s.n i\(; xr.riroKKs 4>t 



wlu-ii a raiini's from 1 2 to cilhiT of its extri'iiu' values appearing In tlie 

 foregoing inequality for a, ("rit. r decreases from 1 to 0. 



Fig. 5 — Components of the ff-Section Relative Impedance 2=.Y + ir in the Trans- 

 mitting Band 



PART III 



Impf.dance of Xon-Dissipative Loaded Lines with Distributed 

 Indlctance 



Disposition of the Transmitting and the Attenuating Bands 



It will be recalled that a loaded line without distributed inductance 

 has only one transmitting band and only one attenuating band. In 

 contrast, a loaded line (Fig. 1) with distributed inductance L has (as 

 shown in Appendix A) an infinite sequence of alternate transmitting 

 and attenuating bands; beginning with a transmitting band extending 

 upward from zero frequency to the first transition frequency which, 

 because of its sf)ecial practical importance in being the upper boundary- 

 frequency of the first or principal transmitting band, is termed the 

 "critical frequency" to distinguish it from the other transition fre- 



