ADS & CST co-simulate

Hi.
I want to export PCBs with active components (ex: BJT, MOS,...) from ADS & import them to CST. Is it possible to co-simulate in this way? How can I do this?
Thanks.

You can export from CST to ADS, but not in inverse order

Thanks Byteptr. But I have to simulate effects of the plane-wave radiation on a PCB with active lumped elements. What can I do?

You can simulate the whole PCB using CST and export the results as a SNP file. You can then use this SNP file to simulate the active circuit with the effect of PCB.

In this way is it possible to simulate interference between plane-wave and circuite lumped components?

It will simulate interference among all PCB traces. I think it is difficult to incorporate the lumped component structure.