guest Post subject: i have a momentum question too! Posted:
Mon Oct 10, 2005 2:54 am Other EM software let you plot characteristic
impedance and attenuation constant of a transmission line but I
didn't see how you would accomplish that in Momentum! Is there a
way to plot these two plus the effective permittivity vs. frequency
in Momentum. Is there a good tutorial on that. The ADS help doesn't
seem to cover this. Nice day!
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pallavi_d
Post subject: Momentum problemPosted: Mon Oct 10, 2005 7:19
am
Captain
Joined: Thu Oct 06, 2005 3:45 am Posts:
7 Location: India Hi,
As far as i know , its not possible
to plot characteristic impedance and attenuation constant of a transmission
line in momentum .I had also tried it , and had the same doubt some
months back. The answer i got was we need to use matlab for getting
the plots. If anyone out there knows the answer let me know too.
regards,
Pallavi
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guest Post
subject: Posted: Mon Oct 10, 2005 4:16 pm i don't want to go
through the matlab why...it's surprising that momentum won't let
users easily plot attenuation constant while other CAD tools do.
any way, gamma = alpha + jBeta where as all know alpha is the attenuation
constant....meaning, you need the real part of gamma to get alpha
now momentum generates gamma and you can plot it, which for
many designers isn't that useful because they're used to looking
at alpha. but as with any plot ADS lets you plot real part of gamma
Real(GAMMA) and the real of gamma which is supposedly alpha will
be plotted. i did that but i do not think i got the right plot...the
attenuation constant was almost zero ...e17 order while all the
other plots like sparam, characteristic impedance are normal and
what i expected....try this and see if you get any sensible result
and then let us know here...take care
Posted 11/12/2012
