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One Port Measurement
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on Sep 3, 2006
on Sep 3, 2006 by Dr_joel
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I have a test fixture with SMA connetor at one end and DUT at the other end. Am I able to deembeded my text fixture just using one-port measurement? P.S. I can short and open the DUT end if this could help. Thx.
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Sep 3, 2006 9:57 PM
If you have a PNA or ENA you can use Automatic Port Extensions (APE) with Loss. This is a brand new, rather clever way (IIMSSM) of determining the one-way loss and delay of the test fixture. If you use an open and/or a short, it does a very good job of determining this loss and automatically de-embedding it from the measurement.
However, this will only account for the loss and delay. If the test fixutre has mismatch, it does not account for that. If you add a load element, then you have what is needed to determine the mismatch effects of the test fixutre, but in that case, you can just do a 1 port cal a the end of the test fixutre.
http://cp.literature.agilent.com/litweb ... 3725EN.pdf
to see some details, or go to the Agilent website and download the latest PNA help file, it has all the details.
Look up "fixture" in the agilent website, or just go to :
http://cp.literature.agilent.com/litweb ... -5329E.pdf
for a pretty good (but slightly dated) app not on this.
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