Wild Life
Member level 1

Hello ev'body, I'm using Pspice for circuit design, I have to insert a Coax model... I need these four attributes: R, C, L, G of RG-174/U Coax Cable.
So, R is resistance per length unit (Ω/m), so I found it using:
R=(d/2)*(d/2)*π*ρ [ρ is COPPER static resistivity and d is inside cable diametrer]
C is requested by my project
the problems are in L and G parameters.
L is inductance per length unit (H/m), and I have to use this:
L=[(μ0μr)/2π]ln(D/d)
D is external diameter
d is internal diameter
μ0 is magnetic constant
μr is magnetic permability
As I have every paramter, I can't find ANYWHERE the μr! I know I have a RG-174/U, with Polyathylene as Dielectric, but I didn't find anywhere PE μr!!!
Another problem is about G, I don't know how I can get it!
Can someone help me?
So, R is resistance per length unit (Ω/m), so I found it using:
R=(d/2)*(d/2)*π*ρ [ρ is COPPER static resistivity and d is inside cable diametrer]
C is requested by my project
the problems are in L and G parameters.
L is inductance per length unit (H/m), and I have to use this:
L=[(μ0μr)/2π]ln(D/d)
D is external diameter
d is internal diameter
μ0 is magnetic constant
μr is magnetic permability
As I have every paramter, I can't find ANYWHERE the μr! I know I have a RG-174/U, with Polyathylene as Dielectric, but I didn't find anywhere PE μr!!!
Another problem is about G, I don't know how I can get it!
Can someone help me?