498 



THE BELL SYSTEM TECHNICAL JOURNAL, JULY 1951 



(1 + i) ^' 





Finally we have 



Real part (as) 



\'/ 



2~ 



(11-15) 



(11-16) 



We can now turn our attention to the stack of laminations shown in 

 Fig. 5. There are shown a series of conducting sheets of conductivity a and 

 thickness PF, separated by a series of insulating sheets of thickness / and 

 dielectric constant e. Suppose we let W and t approach zero while main- 

 taining a constant ratio to obtain a homogeneous but anisotropic material 



^x 



Fig. 5 — Orientation of laminated conductor. 



to which we can apply equation (11-12). In order to obtain €y , o-„ , ex and ax 

 we can write 



1 



(Ty -f- icO€y W 



■}- t\_<r to3eJ 



and 



ax + tCO€x 



1 



... . \Wa-{- t fcoe] 

 W + ^ 



One then has approximately, letting Cy = e and (Tx = a 



•■' = ' {fTw) 



(11-17) 



(n-18) 

 (n-19) 



(11-20) 



(n-21) 



