IC-Stripline design optimization using response surface methodology

This paper presents design optimization of closed version of an IC-Stripline. The geometrical parameters of the IC-Stripline are optimized in order to improve VSWR performance in the frequency range up to 6 GHz. Since the optimization performed directly in 3D EM simulator is computationally expensive, the response surface methodology (RSM) based on design of experiment (DOE) is used to develop surrogate models and to accelerate IC-Stripline design optimization. The design of experiment approach is used to systematically vary geometrical parameters of the IC-Stripline structure which are then simulated in a 3D electromagnetic simulator. The equivalent model circuit parameters are extracted according to the 3D EM simulation results. The response surface formed by the extracted parameter values is modelled using a higher order polynomial. The VSWR optimization of the IC-Stripline is performed by optimizing the equivalent circuit model having the parameters defined by the response surface models. The proposed design of the IC-Stripline shows the improvement in VSWR performance over the frequency range up to 6 GHz.