Abstract
We demonstrate, for the first time, the integration of adjoint variable method (AVM) sensitivities and the method of moments (MoM) within an optimization framework, where the S-parameters are used to define the cost function. The AVM efficiently estimates the sensitivities of the S-parameters using only one MoM simulation with some additional overhead. Two possible approaches are used: the adjoint finite-difference approach and the adjoint Broyden-update approach. The AVM S-parameter sensitivities are successfully utilized to optimize a band-stop filter, a band-pass filter, and an electromagnetically coupled microstrip Yagi antenna. The results show that the optimizers supported by AVM sensitivities are capable of reaching feasible designs satisfying the specifications.
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