Yes, it is good for the electrical and mechanical properties, but I have
found it much
harder to create an appropriate electrical model other than curve
fitting to measured
data...
Regards,
Istvan Novak
Oracle
On 4/1/2015 11:23 PM, Orin Laney wrote:
That's an advantage of copper covered steel. The increased LF attenuation
means the LF to HF attenuation slope is flatter resulting in better pulse
fidelity for wideband applications. That's a favorable tradeoff.
Orin
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of Istvan Novak
Sent: Wednesday, April 01, 2015 7:03 PM
To: dmarc-noreply-outsider@xxxxxxxxxxxxx; si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: How to model a simple 50 Ohm coax with thin coating
of Ag as a return path.
If you need an accurate model, the low-frequency behavior may be impacted by
the composite nature of wires. To enhance mechanical strength, many coax
cables tend to have various forms of copper clad steel, which increases the
low-frequency resistance and inductance of the cable, and with it you get
changing characteristic impedance and group delay.
Regards,
Istvan Novak
Oracle
On 4/1/2015 3:35 PM, Don Girard (Redacted sender girard_don_21@xxxxxxxxx for
DMARC) wrote:
Âsimple coax model.
Hi List,
Looking for suggestions on how to model effect of thin coatings in aÂ
Plan now is to build and measure effects..but would be nice to be able tomodel.
Not having too much success. any thoughts appreciated.Silver.
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
Dielectric between the inner pin and the outer return path = polystyrene.return path by adding a 5 nanometer of a silver coating, everything beyond
D = 2.286 mm I.D. of a polystyrene shell - inner surface of shell form
the the coating is just polystyrene.
When I try to model in CST - the size of the elements to get anyinformation about the 5 nanometer coating - well lets just say we got
nowhere ?
any suggestions?------------------------------------------------------------------
Best Regards,
Don Girard
Â
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