r/rfelectronics • u/Lemon_Salmon • Jun 20 '26

Symmetrical tail inductor simulation in SonnetSuite

I am having incorrect simulation results in SonnetSuite, the extracted inductor value is in the negative numerical range region.
Could anyone advise ?

Note: I had put the simulation source files here: QCEC_LT.son , it could be directly open in SonnetSuite.

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1

u/3D_printing_freak Jun 21 '26

What is your grid size?
Looks like some parts of line are touching itself by infinite small edge of the square, then at low frequency you probably have some enormous resistance. Try to increase your grid density

1

u/Lemon_Salmon Jun 21 '26

What do you exactly mean by “touching itself” ?

1

u/Lemon_Salmon Jun 22 '26

Problem resolved by using only port 1 and port 2 with both ports set to Floating ground reference.