Showing papers by "Giorgio Vannini published in 1991"
TL;DR: A general purpose mathematical approach is proposed for the large-signal modelling of microwave electron devices, which can easily be identified through conventional measurements and is particularly suitable for nonlinear microwave circuit analysis based on harmonic balance techniques.
Abstract: A general purpose mathematical approach is proposed for the large-signal modelling of microwave electron devices (e.g. MESFETs, bipolar transistors, diodes, etc.). The mathematical model, which is based on mild assumptions valid both for field effect and bipolar devices in typical large-signal operating conditions, can easily be identified through conventional measurements and is particularly suitable for nonlinear microwave circuit analysis based on harmonic balance techniques.
52 citations
01 Oct 1991
TL;DR: By using the approach proposed, the intermodulation analysis of quite complex circuits operating under multitone excitations can be carried out even on small-size computers (e.g., workstations), and the validity of the method has been verified in inter modulation analyses of mixers and distributed amplifiers.
Abstract: A new approach to the Harmonic-Balance analysis of non-linear microwave circuits driven by multitone excitations is proposed It is based on the observation that in many practical cases of multitone analyses, signal spectra are characterized by a highly non uniform distribution In such conditions, a convenient representation of the signal spectra in conjunction with a suitable approximation introduced on the frequency response of the reactive components, allow a relevant decoupling of the Harmonic-Balance circuit equations; consequently, a relevant reduction of computing effort can be easily obtained By using the approach proposed, the intermodulation analysis of quite complex circuits operating under multitone excitations can be carried out even on small-size computers (eg, workstations) The validity of the method has been verified in intermodulation analyses of mixers and distributed amplifiers
9 citations
22 May 1991
TL;DR: In this paper, a general-purpose mathematical model for microwave electron devices (e.g., MESFETs, bipolar transistors, diodes, etc.) is proposed.
Abstract: A general-purpose mathematical model for microwave electron devices (e.g., MESFETs, bipolar transistors, diodes, etc.) is proposed. It is based on assumptions valid both for field effect and bipolar devices in typical large-signal operating conditions. Moreover, it can easily be identified through conventional measurements and is particularly suitable for nonlinear microwave circuit analysis based on harmonic balance techniques. The validation tests are carried out on a GaAs MESFET NEC NE71000, by means of simulations with an accurate equivalent circuit and comparisons with measured results. The results confirm the validity of the proposed approach. >
6 citations
08 Dec 1991
TL;DR: In this article, the Nonlinear Integral Model (NIM) was proposed for microwave electron devices, which is rigorously derived from the Volterra series under mild assumptions valid for most types of electron devices.
Abstract: A technology-independent model of microwave electron devices, the Nonlinear Integral Model, is proposed. This model is rigorously derived from the Volterra series under mild assumptions valid for most types of electron devices and is particularly suitable for circuit analysis based on harmonic-balance techniques. Moreover, it makes it possible to compute the large-signal response of an electron device directly in terms of data obtained by physics-based numerical simulations. The validity of the model is confirmed both by simulation and by experimental results. >
5 citations