Efficient and Accurate Method for Separating Variant Components from Invariant Background and Component Model Fusion for Fast RFIC Design Space Exploration

RFIC design often involves exploring numerous variations within a static environment of processing stacks and unchanged blocks. While conventional electromagnetic solvers inefficiently require full-domain simulations for every iteration, this work presents a fast method that algebraically decomposes the total field solution, effectively separating variant components from the invariant background. Consequently, the background field response is simulated once and reused, while only the small, design-dependent components require re-simulation. We also introduce an efficient technique for accurately fusing component models to represent complex systems. To address the computational burden of numerous potential sources, we developed a fast algorithm that reduces the required field solutions to a quantity on the order of the layer number. Applied to RFIC design space exploration, this method demonstrates verified accuracy, robustness, and efficiency.