[SI-LIST] How to model a simple 50 Ohm coax with thin coating of Ag as a return path.

  • From: "Don Girard" <dmarc-noreply-outsider@xxxxxxxxxxxxx> (Redacted sender "girard_don_21@xxxxxxxxx" for DMARC)
  • To: "si-list@xxxxxxxxxxxxx" <si-list@xxxxxxxxxxxxx>
  • Date: Wed, 1 Apr 2015 19:35:32 +0000 (UTC)

 
Hi List,
Looking for suggestions on how to model effect of thin coatings in a  simple
coax model.

Plan now is to build and measure effects..but would be nice to be able to model.
Not having too much success.  any thoughts appreciated.
assume coaxial geometry

assume no air between any elements.

D= I.D. of outer shell element

d. = O.D. of inner

d = Copper Center core pin O.D. = .762 mm - plated with 762 nanometers of
Silver.

Dielectric between the inner pin and the outer return path = polystyrene.

D = 2.286 mm I.D. of a polystyrene shell - inner surface of shell form return
path by adding a 5 nanometer of a silver coating,  everything beyond the the
coating is just polystyrene.

When I try to model in CST - the size of the elements to get any information
about the 5 nanometer coating - well lets just say we got nowhere ?

any suggestions?


Best Regards,


Don Girard
 


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