The state of the art of microwave CAD: EM‐based optimization and modeling

QS Cheng, JW Bandler, S Koziel… - … Journal of RF and …, 2010 - Wiley Online Library
We briefly review the current state of the art of microwave CAD technologies. We look into
the history of design optimization and CAD‐oriented modeling of microwave circuits as well …

Sensitivity analysis with the FDTD method on structured grids

NK Nikolova, HW Tam, MH Bakr - IEEE Transactions on …, 2004 - ieeexplore.ieee.org
We propose an adjoint-variable approach to design-sensitivity analysis with time-domain
methods based on structured grids. Unlike conventional adjoint-based methods, it does not …

Adjoint-based accelerated adaptive refinement in frequency domain 3-D finite element method scattering problems

JJ Harmon, C Key, D Estep, T Butler… - IEEE Transactions on …, 2020 - ieeexplore.ieee.org
We present the application of adjoint analysis to 3-D finite-element method scattering
problems for a posteriori error estimation and adaptive refinement. Adjoint-based …

A topology optimization formulation for transient design of multi‐entry laminated piezocomposite energy harvesting devices coupled with electrical circuit

RA Salas, FJ Ramírez… - International Journal …, 2018 - Wiley Online Library
Laminated piezocomposite energy harvesters (LAPEHs) are multilayer arrangements of
piezoelectric and nonpiezoelectric materials. Multiple materials and physics, and dynamic …

Optimized dynamic design of laminated piezocomposite multi-entry actuators considering fiber orientation

RA Salas, FJ Ramírez-Gil, W Montealegre-Rubio… - Computer Methods in …, 2018 - Elsevier
Laminated piezocomposite actuators (LAPA) are structures composed of piezoelectric and
non-piezoelectric materials layers. Due to several parameters and the multiphysics domain …

Sensitivity analysis of scattering parameters with electromagnetic time-domain simulators

NK Nikolova, Y Li, Y Li, MH Bakr - IEEE Transactions on …, 2006 - ieeexplore.ieee.org
We propose an efficient adjoint-variable approach to the sensitivity analysis of S-parameters
obtained from full-wave electromagnetic (EM) time-domain simulations. It allows the …

Wideband cloaking of objects with arbitrary shapes exploiting adjoint sensitivities

LS Kalantari, MH Bakr - IEEE Transactions on Antennas and …, 2016 - ieeexplore.ieee.org
We propose an effective approach for optimal wideband cloaking of objects with arbitrary
shapes exploiting adjoint sensitivity analysis. Our method optimizes the voxel-by-voxel …

Adjoint sensitivity analysis for uncertain material parameters in frequency-domain 3-D FEM

JJ Harmon, C Key, D Estep, T Butler… - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
We present an application of adjoint analysis for efficient sensitivity analysis and estimation
of quantities of interest in the presence of uncertain model parameters in 3-D finite element …

Inverse design of optical pulse shapes for time-varying photonics

J Baxter, L Ramunno - Optics Express, 2023 - opg.optica.org
Recent advancements in materials and metamaterials with strong, time-varying, nonlinear
optical responses have spurred a surge of interest in time-varying photonics. This opens the …

An adjoint variable method for wideband second-order sensitivity analysis through FDTD

Y Zhang, MH Negm, MH Bakr - IEEE Transactions on Antennas …, 2015 - ieeexplore.ieee.org
We propose an efficient adjoint variable method (AVM) for estimating wideband second-
order response sensitivities using the finite-difference time-domain (FDTD) approach. Our …