[SI-LIST] Re: Port Extension Algorithm
- From: "Mark Randol" <Mark.Randol@xxxxxxxxxx>
- To: <si-list@xxxxxxxxxxxxx>
- Date: Mon, 30 Jul 2007 12:36:58 -0700
Port extensions simply add in an amount of electrical length that the
user specifies. The phase is mathematically 'un-wound' over frequency
based on that setting. No losses or other problems are accounted for.
The assumption is a 'perfect Zo transmission line of electrical length
x'.
Oftentimes it is plenty good enough.
If you need more than that, you need to de-embed the structure in
question with data from either simulation or measurements.
--
Mark Randol, RF Evaluation & Application Engineer
ON Semiconductor
901 S. Mopac Expressway
Barton Oaks 4, Suite 343
Austin, TX 78746
512-329-5640 (voice), 512-329-8151 (FAX)
=20
=20
> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx=20
> [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of=20
> codymiller@xxxxxxxxxx
> Sent: Monday, July 30, 2007 2:23 PM
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Port Extension Algorithm
>=20
> I would like to understand the algorithm used when the port=20
> extension mode is used on a VNA. I have some S11 data that=20
> was previously taken and would like to apply a port extension=20
> to it. Any thoughts?
>=20
> Thanks,
> Cody Miller
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