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A linear inverse space-mapping (LISM) algorithm to design linear and nonlinear RF and microwave circuits

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3 Author(s)
Rayas-Sanchez, J.E. ; Dept. of Electron., Inst. Tecnologico y de Estudios Superiores de Occidente, Jalisco, Mexico ; Lara-Rojo, F. ; Martinez-Guerrero, E.

A linear inverse space-mapping (LISM) optimization algorithm for designing linear and nonlinear RF and microwave circuits is described in this paper. LISM is directly applicable to microwave circuits in the frequency- or time-domain transient state. The inverse space mapping (SM) used follows a piecewise linear formulation, avoiding the use of neural networks. A rigorous comparison between Broyden-based "direct" SM, neural inverse space mapping (NISM) and LISM is realized. LISM optimization outperforms the other two methods, and represents a significant simplification over NISM optimization. LISM is applied to several linear frequency-domain classical microstrip problems. The physical design of a set of CMOS inverters driving an electrically long microstrip line on FR4 illustrates LISM for nonlinear design.

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:53 ,  Issue: 3 )