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Your search keyword '"Monsurrò, P."' showing total 4 results
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4 results on '"Monsurrò, P."'

1. On the homogenization of a Signorini-type problem in a domain with inclusions

Author

Monsurrò, Sara, Perugia, Carmen, and Raimondi, Federica

Subjects
Mathematics - Analysis of PDEs, 35B27, 35J25, 35J20, 35J60, 35R35
Abstract

In this paper we investigate the effect of a Signorini-type interface condition on the asymptotic behaviour, as $\varepsilon$ tends to zero, of problems posed in $\varepsilon$-periodic domains with inclusions. The Signorini-type condition is expressed in terms of two complementary equalities involving the jump of the solution on the interface and its conormal derivative via a parameter $\gamma$. Our problem models the heat exchange in a medium hosting an $\varepsilon$-periodic array of thermal conductors in presence of impurities distributed on some regions of the interface. Different limit problems are obtained according to different values of $\gamma$.

Published
2024

2. An Intermodulation Radar for Non-Linear Target and Transceiver Detection

Author

Stefano Pisa, Alessandro Trifiletti, Pasquale Tommasino, Pietro Monsurrò, Piero Tognolatti, Giorgio Leuzzi, Alessandro Di Carlofelice, and Emidio Di Giampaolo

Subjects
non-linear target, intermodulation radar, transceiver, electronic devices, Chemical technology, TP1-1185
Abstract

The design and the characterization of a non-linear target to test an intermodulation radar was performed using the AWR design environment Version 22 by Cadence software. Two experimental setups for intermodulation measurements were realized in order to characterize connectorized or antenna-equipped devices. Both setups were modeled using the VSS software available inside AWR Version 22. The comparison between measurements and simulations on the designed target showed a very good agreement. Intermodulation measurements were performed on connectorized devices present inside electronic systems and on various transceiver available on the market. This experimental study evidenced that the non-linearities of devices such as amplifiers and mixers are visible at their access ports even when the device is switched off. Moreover, this study highlights the ability of an intermodulation radar to remotely detect the presence of a particular transceiver, even when the latter is switched off, thanks to the specific frequency response of its intermodulation products.

Published
2024
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3. A note on the exact boundary controllability for an imperfect transmission problem

Author

Monsurrò, S., Nandakumaran, A. K., and Perugia, C.

Abstract

In this note, we consider a hyperbolic system of equations in a domain made up of two components. We prescribe a homogeneous Dirichlet condition on the exterior boundary and a jump of the displacement proportional to the conormal derivatives on the interface. This last condition is the mathematical interpretation of an imperfect interface. We apply a control on the external boundary and, by means of the Hilbert Uniqueness Method, introduced by J. L. Lions, we study the related boundary exact controllability problem. The key point is to derive an observability inequality by using the so called Lagrange multipliers method, and then to construct the exact control through the solution of an adjoint problem. Eventually, we prove a lower bound for the control time which depends on the geometry of the domain, on the coefficients matrix and on the proportionality between the jump of the solution and the conormal derivatives on the interface.

Published
2024
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4. An Intermodulation Radar for Non-Linear Target and Transceiver Detection.

Author

Pisa S, Trifiletti A, Tommasino P, Monsurrò P, Tognolatti P, Leuzzi G, Di Carlofelice A, and Di Giampaolo E

Abstract

The design and the characterization of a non-linear target to test an intermodulation radar was performed using the AWR design environment Version 22 by Cadence software. Two experimental setups for intermodulation measurements were realized in order to characterize connectorized or antenna-equipped devices. Both setups were modeled using the VSS software available inside AWR Version 22. The comparison between measurements and simulations on the designed target showed a very good agreement. Intermodulation measurements were performed on connectorized devices present inside electronic systems and on various transceiver available on the market. This experimental study evidenced that the non-linearities of devices such as amplifiers and mixers are visible at their access ports even when the device is switched off. Moreover, this study highlights the ability of an intermodulation radar to remotely detect the presence of a particular transceiver, even when the latter is switched off, thanks to the specific frequency response of its intermodulation products.

Published
2024
Full Text
View/download PDF

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