Abstract:

This talk describes one of the most powerful and computationally efficient optimization techniques for RF and microwave engineering: the space mapping approach to design. Invented in 1994 by Prof. John Bandler from McMaster University in Canada, the space mapping technique has experienced an impressive evolution in terms of variations, improvements, and engineering applications. Space mapping optimization methods belong to the general class of surrogate-based optimization algorithms. They are specialized in the efficient optimization of computationally expensive objective functions. Space mapping intelligently exploits the accuracy of high fidelity but computationally expensive models (fine models), with the efficiency of computationally cheap but insufficiently accurate models (coarse models), yielding powerful algorithms for fast and accurate modeling and design optimization of high frequency circuits.

This talk provides a brief overview of the most fundamental space mapping optimization methods developed until now. It explains in more detail the space mapping technique most widely adopted in industry and academia: the Broyden-based input space mapping algorithm, better known as aggressive space mapping (ASM). The two main characteristics that explain its popularity are illustrated: simplicity and extreme efficiency. The fundamentals behind ASM are explained, accentuating key steps for its successful practical implementation, as well as typical scenarios where it may fail. A number of classical as well as recent industrial applications in different engineering fields are illustrated. Finally, some future directions regarding space mapping design optimization are ventured, including connections to machine learning and artificial intelligence, as well as the emerging cognitive space mapping.

Biography:

José Ernesto Rayas-Sánchez received the B.Sc. degree in electronics engineering from ITESO, Guadalajara, Mexico, the Master’s degree in electrical engineering from Monterrey Tec, Monterrey, Mexico, and the Ph.D. degree in electrical engineering from McMaster University, Ontario, Canada. He is Profesor Numerario (honorary distinction) and Emeritus Professor with ITESO – The Jesuit University of Guadalajara (https://desi.iteso.mx/erayas/), where he was Chair of the Doctoral Program in Engineering Sciences from 2013 to 2019 (https://posgrados.iteso.mx/doctorado-ciencias-ingenieria). Since 2004, he leads the Research Group on Computer-Aided Engineering of Circuits and Systems (CAECAS) at ITESO (https://desi.iteso.mx/caecas/). He is a member of the Mexican National System of Researchers (SNI, for its initials in Spanish), Level III. His research focuses on computer-aided and knowledge-based modeling, design and optimization of high-frequency electronic circuits and devices.

Since 2019, Prof. Rayas-Sánchez is the IEEE Microwave Theory and Technology Society (MTT-S) Representative for the IEEE EDA Council (https://ieee-ceda.org/board-governors). Since 2024, he is an Associate Editor of the IEEE Microwave and Wireless Technology Letters (https://mtt.org/publications/mwtl/editorial-board/). He serves as reviewer for many scientific publications, including IEEE Transactions on Microwave Theory and Techniques, IEEE Transactions on Antennas and Propagation, IEEE Microwave and Wireless Technology Letters, IEEE Microwave Magazine, IEEE Antennas and Wireless Propagation Letters, IEEE Journal on Multiscale and Multiphysics Computational Techniques, IEEE Journal of Microwaves, IEEE Transactions on Emerging Topics in Computing, IET Microwaves, Antennas & Propagation Journal, International Journal of RF and Microwave Computer-Aided Engineering, and International Journal of Numerical Modelling: Electronic Networks, Devices and Fields. He is also a member of the Technical Program Reviewers Committee of the IEEE MTT-S International Microwave Symposium (IMS) (https://ims-ieee.org/).

Prof. Rayas-Sánchez was Chair (2018-2019) and Vice-Chair (2016-2017) of the MTT-S Technical Committee on Computer Aided Design (former MTT-1 on CAD, now MTT-2 on Design Automation, https://mtt.org/technical-committees/tc-2-design-automation-committee/members/). He is a member of the MTT-S Speakers Bureau Program (https://mtt.org/speakers_bureau/). He was the General Chair of the First IEEE MTT-S Latin America Microwave Conference (LAMC-2016, Puerto Vallarta, Mexico, Dec. 2016, http://2016.lamc-ieee.org/). Since 2022, he is the LAMC Executive Committee Chair. During 1994-1996, he was the IEEE Guadalajara Section Chair. Since 2013, he is IEEE MTT-S Regional Coordinator for Latin America (https://www.mtt.org/adcom-committees). He was an elected AdCom member of the IEEE MTT-S for the years 2016-2024.