Hilbertstrauss
Newbie level 5
So I basically designed this inductor ( 2 turns, inner radius=60u, spacing=4u, width=10u) in both sonnet and momentum. The metal layer M9 has a thickness of 3.4u. the under bridge M8 has a thickness of 0.9u. I also manually designed the stack up in both softwares.
I set the maximum cell size in momentum ( RF mode) to 5u (metal and via both are set to 3d model). The cell size in Sonnet is 2.5u (thick conductor model with 2 sheets is used for M8 and M9).
For momentum, I used 2 TML ports with calibration lengths of 85.96u. In sonnet, I used 2 box wall ports also with a calibration length of 85.96u. I used 4 vias for each of the two connections of the underbridge.
**broken link removed**
I run a single frequency simulation at 2.4G in both sonnet and momentum.
The results obtained from momentum differ significantly from those obtained with sonnet. Both are in dB.
For sonnet:
For momentum:
It's been many days now and I still can't find the cause of this inconsistency. At first I thought it could be related to the ground plane used in momentum, so I designed a custom ground plane under the inductor and assigned the ports as it should, this didn't change the results by much (no more than about ~10%).
Any help would be more than appreciated. (The sonnet project file and the momentum workspace project are both attached under).
I set the maximum cell size in momentum ( RF mode) to 5u (metal and via both are set to 3d model). The cell size in Sonnet is 2.5u (thick conductor model with 2 sheets is used for M8 and M9).
For momentum, I used 2 TML ports with calibration lengths of 85.96u. In sonnet, I used 2 box wall ports also with a calibration length of 85.96u. I used 4 vias for each of the two connections of the underbridge.
**broken link removed**
I run a single frequency simulation at 2.4G in both sonnet and momentum.
The results obtained from momentum differ significantly from those obtained with sonnet. Both are in dB.
For sonnet:
For momentum:
It's been many days now and I still can't find the cause of this inconsistency. At first I thought it could be related to the ground plane used in momentum, so I designed a custom ground plane under the inductor and assigned the ports as it should, this didn't change the results by much (no more than about ~10%).
Any help would be more than appreciated. (The sonnet project file and the momentum workspace project are both attached under).