2.0 



I .0 

 0.5 



0.2 

 0.10 

 0.05 



aa 0.02 



0.010 

 0.005 



0:002 

 o.ooto 



0.0005 



0.0002 

 1.0 



0.5 



0.2 



0. I 

 0.05 



aa 



0.02 

 0.010 

 0.005 



0.002 

 0.0010 

 0.0005 



0.0002 



2 



1.0 

 0.5 



0.2 

 0.10 

 0.05 



«a 



0.02 

 0.010 

 0.005 



0.002 

 0-0010 

 0.0005 



0.0002 



1000 200 100 50 20 10 5 2 1 1000 200 100 50 20 10 5 2 1 



e" e" 



Fig. 3 — Attenuation constant as a function of jacket conductivity for modes 

 in various helix waveguides. 



