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IEEE Transactions on Microwave Theory and Techniques
Volume 48 Number 12, December 2000

Table of Contents for this issue

Complete paper in PDF format

Space-Mapping Optimization of Microwave Circuits Exploiting Surrogate Models

Mohamed H. Bakr, Student Member, IEEE John W. Bandler, Fellow, IEEE Kaj Madsen, José Ernesto Rayas-Sánchez, Senior Member, IEEE and Jacob Søndergaard

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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.

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