Dear all SI gurus,
While doing de-embedding by removing 5 inch trace as fixture from 16
inch trace,
I find there are many spikes on my de-embedded S21 plot.
Here are my approaches.
1. Transfer both 5 inch and 16 inch S2P file to T paramter (matrix)
2. cut the 5inch into half by T_2p5inch *T_2p5inch = T_5inch ==>
T_2p5inch=T_5inch^ 0.5; assuming symmetry.
3. do inverse(T_2p5inch)
4. De-embedded result = inv(T_2p5inch)*T_16inch*inv(T_2p5inch)
5. Convert De-embedded T parameters back to S parameters.
I also use Delta-L for de-embedding. Both S21 plot can match well,
except the spikes.
I don't know what happen for the spikes and seek any idea from you.
Thanks,
John Lin
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List forum is accessible at:
http://tech.groups.yahoo.com/group/si-list
List archives are viewable at:
//www.freelists.org/archives/si-list
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
