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Computationally efficient design optimization of dualband microstrip couplers is demonstrated using an adaptive response scaling (ARS) technique. ARS allows for constructing a fast surrogate of the high-fidelity EM-simulation model of the coupler structure under design using its equivalent circuit as an underlying low-fidelity model. ARS relies on nonlinear frequency/amplitude response scaling that...
In this paper, computationally efficient design optimization of a miniaturized dual-band microstrip branch-line coupler is presented. Our optimization approach relies on suitably extracted features of a highly nonlinear response of the coupler structure under design. By formulating the design objectives in terms of the feature point locations, we carry out iterative optimization of the linear model...
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