The analysis of intermodulation distortion in microwave mixers by the Newton-iteration based harmonic-balance technique may lead to numerical problems of unmanageable size, especially for modern multiple-device topologies. The paper describes a sparse-matrix approach providing an effective solution to this shortcoming. Selected entries of the Jacobian matrix are set to zero according to some physical criterion, which leads to a sparse matrix with a predetermined pattern of nonzeroes. A specially developed sparse-system solver may then be applied with optimum efficiency. Both memory storage and CPU time are reduced by two orders of magnitude in the analysis of a typical distributed device.

Intermodulation analysis of microwave mixers by a sparse-matrix method coupled with the piecewise harmonic-balance technique

Rizzoli Vittorio;Lipparini Alessandro;Mastri Franco;Sgallari Fiorella;
1990

Abstract

The analysis of intermodulation distortion in microwave mixers by the Newton-iteration based harmonic-balance technique may lead to numerical problems of unmanageable size, especially for modern multiple-device topologies. The paper describes a sparse-matrix approach providing an effective solution to this shortcoming. Selected entries of the Jacobian matrix are set to zero according to some physical criterion, which leads to a sparse matrix with a predetermined pattern of nonzeroes. A specially developed sparse-system solver may then be applied with optimum efficiency. Both memory storage and CPU time are reduced by two orders of magnitude in the analysis of a typical distributed device.
1990
Rizzoli Vittorio; Lipparini Alessandro; Mastri Franco; Neri Andrea; Sgallari Fiorella; Frontini Valeria
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/917576
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