Global optimization of microwave filters based on a surrogate model-assisted evolutionary algorithm

B Liu, H Yang, MJ Lancaster - IEEE Transactions on Microwave …, 2017 - ieeexplore.ieee.org
Local optimization is a routine approach for full-wave optimization of microwave filters. For
filter optimization problems with numerous local optima or where the initial design is not …

Robust microwave design optimization using adjoint sensitivity and trust regions

S Koziel, F Mosler, S Reitzinger… - International Journal of …, 2012 - Wiley Online Library
A robust algorithm for simulation‐driven design optimization of microwave structures
evaluated using CST MICROWAVE STUDIO® is described. The algorithm exploits gradient …

[HTML][HTML] Fast design closure of compact microwave components by means of feature-based metamodels

A Pietrenko-Dabrowska, S Koziel - Electronics, 2020 - mdpi.com
Precise tuning of geometry parameters is an important consideration in the design of
modern microwave passive components. It is mandatory due to limitations of theoretical …

Reliable space-mapping optimization integrated with EM-based adjoint sensitivities

S Koziel, S Ogurtsov, JW Bandler… - IEEE transactions on …, 2013 - ieeexplore.ieee.org
We present a robust space mapping (SM) algorithm exploiting electromagnetic (EM)-based
adjoint sensitivities for microwave design optimization. Our approach utilizes low-cost EM …

On decision-making strategies for improved-reliability size reduction of microwave passives: Intermittent correction of equality constraints and adaptive handling of …

S Koziel, A Pietrenko-Dabrowska, M Mahrokh - Knowledge-Based Systems, 2022 - Elsevier
Abstract Design optimization of passive microwave components is an intricate process,
especially if the primary objective is a reduction of the physical size of the structure. The …

[HTML][HTML] Globalized simulation-driven miniaturization of microwave circuits by means of dimensionality-reduced constrained surrogates

S Koziel, A Pietrenko-Dabrowska, M Mahrokh - Scientific Reports, 2022 - nature.com
Small size has become a crucial prerequisite in the design of modern microwave
components. Miniaturized devices are essential for a number of application areas, including …

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 …

[HTML][HTML] Variable-fidelity simulation models and sparse gradient updates for cost-efficient optimization of compact antenna input characteristics

S Koziel, A Pietrenko-Dabrowska - Sensors, 2019 - mdpi.com
Design of antennas for the Internet of Things (IoT) applications requires taking into account
several performance figures, both electrical (eg, impedance matching) and field (gain …

Parallel decomposition approach to wide-range parametric modeling with applications to microwave filters

W Zhang, F Feng, J Zhang, Z Zhao… - IEEE Transactions on …, 2020 - ieeexplore.ieee.org
This article proposes a novel decomposition technique to address the challenges of
electromagnetic (EM) parametric modeling, where the values of geometrical parameters …

Fast EM-driven parameter tuning of microwave circuits with sparse sensitivity updates via principal directions

A Pietrenko-Dabrowska, S Koziel - Knowledge-Based Systems, 2022 - Elsevier
Numerical optimization has become more important than ever in the design of microwave
components and systems, primarily as a consequence of increasing performance demands …