From: Ozgur Misman ([email protected])
Date: Fri Apr 27 2001 - 14:41:49 PDT
Hi Nianci,
We faced a similar problem before. I would say that line cal is more
accurate then momentum for lossy characteristic impexdance. Momentum does
not model metal thickness. I think the upcoming version will. The
impedance you get using line cal is lossy characteristic impedance and that
matches very well with some state of the art 2-D field solver solutions. My
guess is you should be ok with momentum if lossles cjharacteristic
impedance sqrt (L/C) is what you are looking for. For lossy, I would go by
Line Cal.
Again, this is purely based on my personal experience and I haven't
verified it with measurement but used a 2-D solver for comparisons.
Best Regards,
Ozgur Misman
Amkor Technology, INC
Sr. Engineer
"Nianci Wang" <[email protected]>@silab.eng.sun.com on 04/27/2001 01:24:25 PM
Please respond to "Nianci Wang" <[email protected]>
Sent by: [email protected]
To: "'[email protected]'" <[email protected]>
cc:
Subject: [SI-LIST] : Question on transmission line simulation by HP ADS
/Momentum
Hi,
I have a question on simulating finite metal thickness transmission line by
using HP ADS Line Calc and Momentum.
Basically I did simulation by using both line Calc and Momentum for several
different structures, I found that Momentum always give me a higher
characteristic impedance than that of Line Calc. The thicker the metal is,
the
larger the difference between two simulation results. I did talk with HP
ADS
help line and got the answer was that Momentum gave more accurate
simulation
results. I wonder if any one did the simulation by each line Calc or
Momentum
and compared the result with that of the measurement.
Thank you
Nianci
**** To unsubscribe from si-list or si-list-digest: send e-mail to
[email protected]. In the BODY of message put: UNSUBSCRIBE
si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
si-list archives are accessible at http://www.qsl.net/wb6tpu
****
**** To unsubscribe from si-list or si-list-digest: send e-mail to
[email protected]. In the BODY of message put: UNSUBSCRIBE
si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
si-list archives are accessible at http://www.qsl.net/wb6tpu
****
This archive was generated by hypermail 2b29 : Thu Jun 21 2001 - 10:11:45 PDT