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How to connect lumped component and .s2p on a finite ground design?

Question asked by Riju on Jan 31, 2019
Latest reply on Feb 4, 2019 by volker_muehlhaus

Hello members,


I am designing a structure containing patch antenna and some passive components where I have to place .s2p data of capacitors and lumped resistor from ADS "lumped components library".


I have got completely different result in infinite ground MoM (very good result)  and finite ground MoM case (worst result). I might have done mistakes in case of finite ground MoM case. Near to patch, I have kept ground plane size 3 times of width and length of patch accordingly. I have also changed the port calibration from TML to AUTO in finite ground case, but the response is same.


Please see the following figures taken from Co-simulation (Yellow is bottom finite ground and orange is the top metal). In all cases, ground pin is 0.1mm away from the + pin. The design frequency is 10 GHz.

^^ Lumped resistor


^^ s2p componets


^^ Term component