Questions about the new calibration types in ADS2011

hi, all

I'm a green hand in using ADS2011 and I find the differences between these updates and the old ADS2008/2009 hamper my EM simulation.
Here is my question:

In ADS 2011 EM modeling, TML with zero length, SMD and delta-gap are the new calibration types. I thought that "TML" is equivalent to "Single Mode" in ADS2008/2009 and simply believe that "TML(0-length)" is the same as "internal" in the old edition. To verify this, I made a simply EM simulation, the results giben by "Single Mode" and "TML" agree with each other, but great differences exist between "internal" and "TML with zero length".

Then I reach for the help manual. I fail to find internal port in ADS2011 and still do not understand what "TML(0-length)" means. Now I want to define a internal port in the layout. How to do this in ADS 2011?

THX

Hi,

Even I am facing the same problem in ADS2011 as I could not find how to define ports as internal. The help manual in ADS2011 is that of ADS 2009 or older version.

I am glad you pointed this out as I was not finding anyone with the same problem as mine.

Having said that, I have observed that, if you have ports on the edges as well as inside the layout then choosing "None" option is feasible. This hint you will find in the help manual also.

Thank you

Samkeet

Hi,

if you want an internal port choose no calibrated port. It is equivalent to internal ports in prior ads versions. But be careful where you place internal ports. The excitation is different placing at an edge or inside a structure.

TML (zero length): ADS adds directly the source (not a lambda-half tml) at the structure but takes the parasitic effects of an open-end at the port into account.

Best regards

I don't know how to define ADS 2011 ports to do a CPWG simulation. My coplanar waveguide is represented in momentum without the Slots, I means, as the real layout is.

Any help? Thanks

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