Space Mapping Optimization of Microwave Circuits Exploiting Surrogate Models

M. H. Bakr, J. W. Bandler, Kaj Madsen, J. E. Rayas-Sánchez, Jacob Søndergaard

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    A powerful new space-mapping (SM) optimization algorithm is presented in this paper. It draws upon recent developments in both surrogate model-based optimization and modeling of microwave devices, SM optimization is formulated as a general optimization problem of a surrogate model. This model is a convex combination of a mapped coarse model and a linearized fine model. It exploits, in a novel way, a linear frequency-sensitive mapping. During the optimization iterates, the coarse and fine models are simulated at different sets of frequencies. This approach is shown to be especially powerful if a significant response shift exists. The algorithm is illustrated through the design of a capacitively loaded 10:1 impedance transformer and a double-folded stub filter. A high-temperature superconducting filter is also designed using decoupled frequency and SMs.
    Original languageEnglish
    JournalIEEE Transaction on Microwave Theory and Techniques
    Volume48
    Issue number12
    Pages (from-to)2297-2306
    ISSN0018-9480
    Publication statusPublished - 2000

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