U
Umberto Pisani
Researcher at Polytechnic University of Turin
Publications - 46
Citations - 950
Umberto Pisani is an academic researcher from Polytechnic University of Turin. The author has contributed to research in topics: Load pull & Calibration. The author has an hindex of 11, co-authored 46 publications receiving 913 citations.
Papers
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Journal ArticleDOI
Two-port network analyzer calibration using an unknown 'thru'
Andrea Ferrero,Umberto Pisani +1 more
TL;DR: A procedure performed by using a genuine two-port reciprocal network instead of a standard 'thru' in a full two- port error correction of an automatic network analyzer is presented and provides a great degree of accuracy.
Journal ArticleDOI
An improved calibration technique for on-wafer large-signal transistor characterization
Andrea Ferrero,Umberto Pisani +1 more
TL;DR: In this article, an automatic vector network analyzer with coaxial directional couplers and RF coplanar wafer probes is used for on-wafer measurement of two-port devices.
Journal ArticleDOI
A new implementation of a multiport automatic network analyzer
TL;DR: In this article, a generalized multiport network analyzer implemented using commercially available hardware is presented, where measurement calibration is accomplished through a novel calibration procedure which requires only conventional standards used for two-port calibrations.
Journal ArticleDOI
Active load technique for load-pull characterisation at microwave frequencies
TL;DR: The letter describes a load-pulling method that allows an extension of the two-signal approach to applications where the output frequency spectrum is different from the input one, as in the case of power devices operating with multicarrier input signals.
Journal ArticleDOI
Recent Advances in Real-Time Load-Pull Systems
TL;DR: It is shown, with measurements and with very simple calculations, that the combined use of load-pull heads, a passive tuner, and an active loop not only boosts the available GammaL but also decreases the loop amplifier output power, with a sensible reduction in the overall cost of the system.