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191 results on '"Panariello, Gaetano"'

1. Antenna Arrays for Line-of-Sight Massive MIMO: Half Wavelength is not Enough

Author

Pinchera, Daniele, Migliore, Marco Donald, Schettino, Fulvio, and Panariello, Gaetano

Subjects
Computer Science - Information Theory, Computer Science - Networking and Internet Architecture
Abstract

The aim of this paper is to analyze the array synthesis for 5 G massive MIMO systems in the line-of-sight working condition. The main result of the numerical investigation performed is that non-uniform arrays are the natural choice in this kind of application. In particular, by using non-equispaced arrays, we show that it is possible to achieve a better average condition number of the channel matrix and a significantly higher spectral efficiency. Furthermore, we verify that increasing the array size is beneficial also for circular arrays, and we provide some useful rules-of-thumb for antenna array design for massive MIMO applications. These results are in contrast to the widely-accepted idea in the 5 G massive MIMO literature, in which the half-wavelength linear uniform array is universally adopted., Comment: updated version of the paper, that now includes additional results on the spectral efficiency

Published
2017
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3. Full-wave Validation of Plane Waves Model for Numerical Dosimetry in Reverberation Chambers

Author

Schettino, Fulvio, Rita, Massa, Panariello, Gaetano, Lucido, Mario, Lucido, Mario, Massa, Rita, Panariello, Gaetano, and Schettino, Fulvio

Subjects
Scattering, Scattering, plane wave expansion, reverberating chamber, numerical dosimetry, analytical regularization, Numerical models, Reverberation chambers, Computational modeling, Scattering, Dielectric losses, Estimation, Microwave theory and techniques, Numerical models, Microwave theory and techniques, Reverberation chambers, Computational modeling, Estimation, Dielectric losses
Abstract

A full wave method developed for the analysis of lossy dielectric disks is applied to the evaluation of the field induced in a Petri dish exposed in a reverberation chamber. The rich scattering environment can be modeled by means of a plane wave expansion, which is usually approximated taking into account only a few waves. The proposed method allows to assess the accuracy achieved for any given number of considered plane waves.

Published
2022

8. TE scattering by arbitrarily connected conducting strips

Author

Lucido, Mario, Panariello, Gaetano, and Schettino, Fulvio

Subjects
Electromagnetic fields -- Evaluation, Electromagnetic waves -- Scattering, Electromagnetic waves -- Methods, Business, Computers, Electronics, Electronics and electrical industries
Abstract

The scattering by an arbitrary collection of perfectly conducting connected strips is analyzed for TE incidence. The studied configurations include both closed and open polygonal cross-section cylinders, as well as more complicated structures in which more than two strips are connected at a point. The proposed method is very efficient as few expansion functions are needed in a Galerkin scheme. This is achieved by means of expansion functions factorizing the correct edge singularity of the electromagnetic field, and ensuring the continuity of the current at connecting points. Index Terms--Conducting cylinder, electromagnetic scattering, Galerkin method.

Published
2009

9. Electromagnetic scattering by multiple perfectly conducting arbitrary polygonal cylinders

Author

Lucido, Mario, Panariello, Gaetano, and Schettino, Fulvio

Subjects
Electromagnetic fields -- Properties, Cylinder (Mathematics) -- Properties, Electromagnetic waves -- Scattering, Electromagnetic waves -- Research, Business, Computers, Electronics, Electronics and electrical industries
Abstract

We analyze the scattering by multiple perfectly conducting cylinders with arbitrary polygonal cross-section. The proposed method is very efficient as few expansion functions are needed in a Galerkin scheme. This is achieved by means of the analytical regularization of the problem obtained by factorizing the correct edge singularity of the electromagnetic field. A particular attention has also been paid to the numerical computation of the integrals involved, and formulas for their accurate and quick evaluation are given. Index Terms--Analytical regularization, cylindrical scatterers, electromagnetic scattering.

Published
2008

10. Analysis of the electromagnetic scattering by perfectly conducting convex polygonal cylinders

Author

Lucido, Mario, Panariello, Gaetano, and Schettino, Fulvio

Subjects
Scattering (Physics) -- Analysis, Electromagnetic waves -- Scattering, Electromagnetic waves -- Analysis, Business, Computers, Electronics, Electronics and electrical industries
Abstract

An effective method for the analysis of the scattering by a perfectly conducting convex polygonal cross-section cylinder is presented. The effectiveness stems from the generalization of the Neumann series, factorising the right edge behavior of the electromagnetic field, thus leading to a quickly convergent method. The induced currents, the radar cross section (RCS) and the induced field ratio have been evaluated. Index Terms--Analytical regularization, cylindrical scatterers, electromagnetic scattering.

Published
2006

13. Accurate diagnosis of conformal arrays from near-field data using the matrix method

Author

Bucci, Ovidio Mario, Migliore, Marco Donald, Panariello, Gaetano, and Sgambato, Pasquale

Subjects
Diagnosis, Business, Computers, Electronics, Electronics and electrical industries
Abstract

The matrix method for array diagnosis is based on the reconstruction of the excitation from measured near-field data by solving the linear system relating the excitation coefficients to the field at the measurement points. In this paper the matrix method is applied to the diagnosis of element failures in high-performance conformal array radar. The results confirm the usefulness of this technique in the cases wherein the standard backward propagation technique cannot be applied. Index Terms--Antenna measurement, arrays diagnosis, conformal array, near-field measurements.

Published
2005

16. Antenna pattern synthesis: a new general approach

Author

Bucci, Ovidio Mario, D'Elia, Giuseppe, Mazzarella, Giuseppe, and Panariello, Gaetano

Subjects
New Technique, Antennas, System Design, Structured Design Techniques, Radiation, Electromagnetic Radiation
Published
1994

17. An Analytical Approach for the Efficient Evaluation of a Class of Improper Integrals Involving Oscillating and Slowly Decaying Functions

Author

Lucido, Mario, Panariello, Gaetano, Santomassimo, Chiara, and Schettino, Fulvio

Subjects
Method of analytical preconditioning, Improper integrals of oscillating and slowly decaying functions, Spectral domain, Analytical technique, Improper integrals of oscillating and slowly decaying functions, Method of analytical preconditioning, Spectral domain, Analytical technique
Published
2018

40. Efficient and Accurate Full-Wave Analysis of the Open-Ended Coaxial Cable

Author

Panariello, Gaetano, Verolino, Luigi, and Vitolo, Gaetano

Subjects
Coaxial cables -- Analysis, Microwave transmission lines -- Analysis, Business, Computers, Electronics, Electronics and electrical industries
Abstract

An efficient implementation of the full-wave open-ended-coaxial-line analysis is presented in this paper. The involved integrals are approached in such a way that the admittance is accurately calculated. Moreover, the calculus time is noticeably reduced. This technique is particularly useful when repeated analysis are performed as occurs, e.g., when measuring permittivity. Index Terms--Coaxial cable, permittivity measurements, termination.

Published
2001

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