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#14 coupling length problem ...

open
5
2005-05-11
2005-02-14
Anonymous
No

I created a 4 conductor stripline cross-section in
microns for evaluating crosstalk. I found I needed to
include the coupling length as a sweep parameter (with
iteration = 1) to have it represented in microns;
otherwise, the value would be interpreted as meters.
Choosing 'Run BEM MMTL Simulation' from the menu, the
results are correct (no micron <-> meter confusion).
This may be due to operator error, but is repeatable
with the same cross-section input. Load the *.xsctn
file (attached), then

(works - correct units)
* menu pick -> Run BEM MMTL Simulation
* menu pick -> BEM -> View BEM MMTL Result
... Coupling Length = 0.01000 meters

(fails - interprets coupling length as meters instead
of microns)
* menu pick -> Sweep Simulation
* parameter pick -> ::RectCond2 xOffset
* enter # iterations for ::RectCond2 xOffset -> 1
* dialog -> Run Simulation
* dialog -> Data prior to simulations
* menu pick -> Sweep -> View "swept_result" file
... Coupling Length = 10000.00000 meters

(works - correct units)
* menu pick -> Sweep Simulation
* parameter pick -> ::CouplingLength
* parameter pick -> ::RectCond2 xOffset
* enter # iterations for ::CouplingLength -> 1
* enter # iterations for ::RectCond2 xOffset -> 1
* dialog -> Run Simulation
* dialog -> Data prior to simulations
* menu pick -> Sweep -> View "swept_result" file
... Coupling Length = 0.01000 meters

The version of 'TNT' is 1.2.2.

Discussion

  • Nobody/Anonymous

    cross-section for testing coupling length unit problem in sweeps

     
  • rgf

    rgf - 2005-02-14

    Logged In: YES
    user_id=1219232

    ... sorry the 'nobody', I just registered w sourceforge and
    missed the login step.

     
  • rgf

    rgf - 2005-02-14

    Logged In: YES
    user_id=1219232

    ... sorry the 'nobody', I just registered w sourceforge and
    missed the login step.

     
  • Bob Techentin

    Bob Techentin - 2005-05-11
    • assigned_to: nobody --> techentin
     

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