[SI-LIST] Re: Port Extension Algorithm

Hi Mark,

VNA calibration is quite flexible, but it's important to know which type =
of error correction to use at the right time. Understanding =
de-embedding, port rotation, time domain gating, SOLT, TRL, LRM, =
normalization and a host of others can be a daunting task. We just =
finished a good app note on this subject called, " Signal Integrity =
Analysis Series Part 3: The ABCs of De-Embedding". To check it out, go =
here:

http://www.home.agilent.com/agilent/redirector.jspx?action=3Dref&cname=3D=
AGILENT_EDITORIAL&ckey=3D1224306&lc=3Deng&cc=3DUS

I hope this helps.

Regards,
Mike

Mike Resso
Product Manager
Signal Integrity Applications
Component Test Division
Agilent Technologies
1400 Fountaingrove Pkwy.
Mail Stop 3USG
Santa Rosa, Ca. 95403
707-577-6529=20
=20

=20

-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] =
On Behalf Of Mark Randol
Sent: Monday, July 30, 2007 12:37 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Port Extension Algorithm

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)
=3D20
=3D20

> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx=3D20
> [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of=3D20
> codymiller@xxxxxxxxxx
> Sent: Monday, July 30, 2007 2:23 PM
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Port Extension Algorithm
>=3D20
> I would like to understand the algorithm used when the port=3D20
> extension mode is used on a VNA. I have some S11 data that=3D20
> was previously taken and would like to apply a port extension=3D20
> to it. Any thoughts?
>=3D20
> Thanks,
> Cody Miller
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