Giampiero Lovat
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View article: Electrostatic Field by Thunderclouds: Threat at Ground Level
Electrostatic Field by Thunderclouds: Threat at Ground Level Open
The physics of charge formation and separation within clouds prior to lightning events is still not fully understood. The common and practical, simplified approach based on three lumped charges may conduct to unrealistic predictions, which…
View article: Lucas decomposition and extrapolation methods for the evaluation of infinite integrals involving the product of three Bessel functions of arbitrary order
Lucas decomposition and extrapolation methods for the evaluation of infinite integrals involving the product of three Bessel functions of arbitrary order Open
A method to efficiently evaluate integrals containing the product of three Bessel functions of the first kind and of any non negative real order is presented. The numerical problem is particularly challenging since standard integration tec…
View article: Rapidly convergent series and closed-form expressions for a class of integrals involving products of spherical Bessel functions
Rapidly convergent series and closed-form expressions for a class of integrals involving products of spherical Bessel functions Open
Rapidly convergent series are derived to efficiently evaluate a class of integrals involving the product of spherical Bessel functions of the first kind occurring in acoustic and electromagnetic scattering from circular disks and apertures…
View article: Transient Magnetic Shielding of a Planar Conductive Thin Screen via Exact Image Theory
Transient Magnetic Shielding of a Planar Conductive Thin Screen via Exact Image Theory Open
The exact image theory is here applied to study the transient shielding effectiveness of a canonical shielding configuration, i.e., a small current loop in the presence of a parallel planar thin conductive sheet. In particular, the Green f…
View article: Magnetic-Field Transmission Through a Circular Aperture in a Magneto-Conductive Screen: Identification of Aperture Penetration and Field Diffusion Contributions
Magnetic-Field Transmission Through a Circular Aperture in a Magneto-Conductive Screen: Identification of Aperture Penetration and Field Diffusion Contributions Open
The magnetic field transmitted through a circular aperture in an infinite magneto-conductive planar screen with finite thickness is studied, considering as a source a circular electric current loop coaxial with the aperture. The field sour…
View article: Spectral-domain method of moments for the modal analysis of line waveguides
Spectral-domain method of moments for the modal analysis of line waveguides Open
A rigorous full-wave modal analysis based on the method of moments in the spectral domain is presented for line waveguides constituted by two-part impedance planes with arbitrary anisotropic surface impedances. An integral equation is form…
View article: A Dual Integral Equation Approach for Evaluating the Shielding of Thick Circular Disks against a Coaxial Loop
A Dual Integral Equation Approach for Evaluating the Shielding of Thick Circular Disks against a Coaxial Loop Open
The electromagnetic interaction between a circular disk with finite conductivity and finite thickness and a coaxial circular loop of constant current is addressed here. The finite conductivity and thickness of the material disk lead to the…
View article: Standards and Measurement Methods for Shielding Applications
Standards and Measurement Methods for Shielding Applications Open
Although international organizations have produced documents providing recommendations for implementation of EMC requirements, each country has its own recommendations in its national standards, with its set of test instruments, test proce…
View article: Electrostatic Shielding
Electrostatic Shielding Open
In this appendix, the focus is on electrostatic shielding. Several electrostatic effects can in fact damage or cause failure in electronic components and assemblies. High- speed and high-density electronic devices are especially vulnerable…
View article: Statistical Electromagnetics for Shielding Enclosures
Statistical Electromagnetics for Shielding Enclosures Open
Statistical studies on the electromagnetic field distribution inside metallic cavities date back several decades. Statistical electromagnetics has received a strong boost from the use of reverberation chambers (RCs) and the most important …
View article: Magnetic Shielding
Magnetic Shielding Open
At low frequencies the magnetic field is due either to the electric current flowing in conductors of various geometries or to the magnetization of surrounding ferromagnetic materials. The classical strategy for reducing quasi-static magnet…
View article: Magnetic field penetration through a circular aperture in a perfectly conducting plate excited by a coaxial loop
Magnetic field penetration through a circular aperture in a perfectly conducting plate excited by a coaxial loop Open
The transmission of an electromagnetic field produced by a current loop of finite radius through a coaxial circular aperture in a perfectly conducting plate is evaluated through a rapidly convergent formulation in an exact form. By applyin…
View article: Analysis of Metal Oxide Varistor Arresters for Protection of Multiconductor Transmission Lines Using Unconditionally-Stable Crank–Nicolson FDTD
Analysis of Metal Oxide Varistor Arresters for Protection of Multiconductor Transmission Lines Using Unconditionally-Stable Crank–Nicolson FDTD Open
Surge arresters may represent an efficient choice for limiting lightning surge effects, significantly reducing the outage rate of power lines. The present work firstly presents an efficient numerical approach suitable for insulation coordi…
View article: ANALYTICAL SOLUTION OF THE ZERO-THICKNESS PERFECTLY-CONDUCTING CIRCULAR DISK IN THE PRESENCE OF AN AXISYMMETRIC MAGNETIC DIPOLE: A SECOND-KIND FREDHOLM INTEGRAL-EQUATION APPROACH
ANALYTICAL SOLUTION OF THE ZERO-THICKNESS PERFECTLY-CONDUCTING CIRCULAR DISK IN THE PRESENCE OF AN AXISYMMETRIC MAGNETIC DIPOLE: A SECOND-KIND FREDHOLM INTEGRAL-EQUATION APPROACH Open
The problem of radiation of a magnetic dipole axially symmetric with an infinitesimally thin perfectly conducting circular disk is solved in an exact closed form. This is done by transforming the original dual integral equation system desc…
View article: SHIELDING OF AN IMPERFECT METALLIC THIN CIRCULAR DISK: EXACT AND LOW-FREQUENCY ANALYTICAL SOLUTION
SHIELDING OF AN IMPERFECT METALLIC THIN CIRCULAR DISK: EXACT AND LOW-FREQUENCY ANALYTICAL SOLUTION Open
The problem of evaluating the shielding effectiveness of a thin metallic circular disk with finite conductivity against an axially symmetric vertical magnetic dipole is addressed. First, the thin metallic disk is modeled through an appropr…
View article: SHIELDING OF A PERFECTLY CONDUCTING CIRCULAR DISK: EXACT AND STATIC ANALYTICAL SOLUTION
SHIELDING OF A PERFECTLY CONDUCTING CIRCULAR DISK: EXACT AND STATIC ANALYTICAL SOLUTION Open
The problem of the shielding evaluation of an infinitesimally thin perfectly conducting circular disk against a vertical magnetic dipole is here addressed. The problem is reduced to a set of dual integral equations and solved in an exact f…