[SI-LIST] Re: Outer Shield of coaxial cable
- From: steve weir <weirsi@xxxxxxxxxx>
- To: Neo <neoflash2008@xxxxxxxxx>
- Date: Wed, 03 Mar 2010 12:55:31 -0800
Neo the Cu thickness contributes to the bulk resistance component of
impedance up to about twice the skin depth frequency. Once you get
several times the skin depth frequency the internal inductance of the
conductor is no longer significant. 3 mils in solid Cu has a skin depth
just under 1MHz.
Steve
Neo wrote:
> Steve:
>
> Do you mean the skin depth is smaller than 3mil, so the thicker outer
> shield should not help?
>
> Neo
>
> --- On *Wed, 3/3/10, steve weir /<weirsi@xxxxxxxxxx>/* wrote:
>
>
> From: steve weir <weirsi@xxxxxxxxxx>
> Subject: [SI-LIST] Re: Outer Shield of coaxial cable
> To: "Neo" <neoflash2008@xxxxxxxxx>
> Cc: "List Si" <si-list@xxxxxxxxxxxxx>
> Date: Wednesday, March 3, 2010, 3:10 AM
>
> Neo, if 3 mils of Cu shield thickness is showing up as your dominant
> loss, then you are either running at deep sub MHz frequencies, or you
> set the problem up incorrectly.
>
> Steve.
> Neo wrote:
> > Hi folks,
> > I have a question about the outer shield metal of a coaxial cable.
> >
> > For a AWG26 cable, what is thickness of the usually used outer
> shield copper layer? I tried to use 3mil, and the field solver
> told me that the most lossy part of the cable is the shield.
> >
> > Any suggestion?
> >
> > Regards,
> > Neo
> >
> >
> >
> >
> >
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>
> --
> Steve Weir
> IPBLOX, LLC
> 150 N. Center St. #211
> Reno, NV 89501
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--
Steve Weir
IPBLOX, LLC
150 N. Center St. #211
Reno, NV 89501
www.ipblox.com
(775) 299-4236 Business
(866) 675-4630 Toll-free
(707) 780-1951 Fax
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