1122 THE BELL SYSTEM TECHNICAL JOURNAL, NOVEMBER 1952 



line in which the relative fractions of space occupied l)y the main dielec- 

 tric and the laminations are arbitrary. 



A parallel-plane Clogston 2 line is shown schematically in Fig. 10. 

 It consists of a stack of alternate layers of conducting and insulating 

 material, whose total thickness is a. As before, the electrical constants of 

 the conducting and insulating layers are denoted by ^i , c/i and eo , M2 

 respectively; and the fraction of conducting material in the stack is 

 called e. The stack is bounded at ^ = ±|a by sheaths whose normal 

 surface impedance is Zn(y), where 7 is the longitudinal pi-opagation 

 constant of the mode under consideration. 



Zn(7) 

 Fig. 10 — Parallel-plane Clogston 2 transmission line. 



Zb(/) 

 Fig. 11 — Coaxial Clogston 2 transmission line. 



