Design optimization of planar structures using self-adjoint sensitivity analysis

Abstract

A new practical approach to the S -parameter sensitivity analysis of planar structures is proposed. The response sensitivities are obtained with a self-adjoint approach with discrete shape perturbations on non-uniform method-of-moment grid. The technique is illustrated through the S -parameter sensitivity analysis of a planar printed antenna and a microwave double-stub tuner. The computed sensitivities are validated by comparing with the central finite-difference estimates at the response level. Gradient-based optimization is performed using the sensitivity information. The performance of the optimized design is verified by simulation and by measurement. © 2012 IEEE.