how simulation inductor with PGS in ADS Momentum

I want simulation inductor with Patterned Ground shield,in ADS Momentum 2015.
( no problem with simulation and extract Q and L from inductor without PGS)

How I can Extract Quality factor From inductor with PGS.
I think I have 2 option.
1- create 3 port( 2 port for inductor and 1 port for PGS). but I dont know how extract quality factor from this 3-port.

2-
in normal PGS port must be Grounded.i dont know how ground a port in ADS Momentum..because momentum work with infinite ground(and we have no local ground).

thanks

附图/附件

inductor11e.PNG

Hi Mohammad,

was this created with Inductor Toolkit?
http://muehlhaus.com/products/rfic-inductor-toolkit-for-ads

If yes, you can connect port 3 to ground and use equations Qdiff(S) and Ldiff(S) that are automatically loaded when you load Inductor Toolkit.

With ADS standalone (without Inductor Toolkit) the ground shield must be connected at mid-potential between ports 1 and 2 to get the differential inductor parameters. You can use the ADS 3-port balun elements to create the differential signal at ports 1 and 2, and then connect port 3 to the circuit simulator global ground.

Best regards
Volker

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