#349 Hybrid EM-Circuit Simulation Workflow for IHP SG13G2 Issue created by rupokdas147 I am designing a 100 GHz broadband power amplifier using the IHP SG13G2 HBT process. I can individually EMS transmission lines and inductors using openEMS and use the s2p files in the schematic. But this method does not include the effects of nearby signal lines, since I am EMS them individually. But I want to validate my hybrid EM-circuit simulation more accurately. But openEMS does not support active devices like HBT. So, I plan to: 1. Define multiple ports at all transistor terminals (base, collector, emitter) and interconnect points in openEMS. 2. Simulate all passive structures together (transmission lines, inductors, matching networks) to capture mutual coupling and parasitic effects. 3. Extract an SNP file (e.g., S4P, S6P) containing the S-parameters of the full passive layout. 4. Import the SNP file into Qucs-S and connect: BJTs using IHP's SG13G2 models, Bias sources at the correct terminals, Additional lumped elements as needed. 5. Run circuit simulations to analyze gain, stability, and nonlinear performance. Questions: 1. Is this approach correct for hybrid EM-circuit simulation with IHP's SG13G2 process? 2. Should I terminate every open terminal with a port in openEMS? 3. Are there better methods for integrating EM-simulated layouts with IHP’s active device models? Any insights or corrections would be greatly appreciated! Thank you! IHP-GmbH/IHP-Open-PDK