In my opinion differential or single-ended makes no difference for Dk/Df
extraction. Important is the kind of structure you use. A simple trace is not a
good structure. I suggest a resonant standard like a Beatty Standard.
Check the Designcon 2018 paper "Non-Destructive Analysis and EM Model Tuning of
PCB Signal Traces using the Beatty Standard"
Jose
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On ;
Behalf Of John Lin
Sent: Dienstag, 23. Mai 2017 05:53
To: si-list <si-list@xxxxxxxxxxxxx>
Subject: [SI-LIST] Differential vs. SE for PCB Dk/Df extraction
Hi SI gurus,
While using VNA to measurement traces on PCB for loss and Dk/Df extraction,
my colleagues say the differential handhold probe head can have wider bandwidth
than single ended handhold probe head. Is it true?
Can someone help to explain the reasons?
Also, for Dk/Df extraction, which is better structure, using single ended or
differential traces? Why?
Thank you for helps in advance.
Thanks,
John Lin
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