TWO-CONDUCTOR LOW-PASS TRANSMISSION LINE THEORY.
Quarterly rept. no. 8,
IIT RESEARCH INST CHICAGO ILL
Pagination or Media Count:
The effects of variations in the contact between the dielectric and the two conductors of an atten uating coaxial cable were studied. It is shown that the contact given by a closely-knitted copper braid over the outside of the cable gives as good a contact as is commercially feasible. The dif ficulty arisecontact at the inner conductor. Several additional cable types are now on order in order to determine if standard commercial manufacturing techniques can be used to construct a cable which will meet design spec ifications. Lines which utilize a ferrite as the dielectric were constructed. It was found that at least a two-fold increase in the attenuation of such a line can be realized through the use of a thin resistive film to periodically load the line. Ferrite-filled dielectrics were investi gated. Experimental evidence indicates that little additional benefit is derived from such a technique over the use of any metallic filler. Techniques were also studied for allowing the use of frequency-dependent, semi-solid materials to be incorporated into a practical line design. This may be accomplished through the use of lauric acid to solidify the line. Author