Electrical Engineering

Introduction to electromagnetic compatibility (EMC): definitions, passive dipoles and high frequency response, measurement units. Sources of electromagnetic disturbances: classification of sources, natural sources, unintentional artificial sources, intentional artificial sources, electrostatic discharges, electromagnetic pulse. Modes of electromagnetic coupling of disturbances: characteristics of electromagnetic interference, conductive coupling, inductive coupling, capacitive coupling, electromagnetic coupling. Transmission lines: simulation models in the frequency domain, equivalent two-port circuit of transmission line. Multiconductor transmission lines: simulation models in the frequency domain, coaxial cable, modal analysis, equivalent multipole two-port circuit of a multiconductor transmission line. Crosstalk. Low frequency analysis: single-conductor line with single-conductor line, single conductor line with a two-wire line and with two-wire twisted line at low frequency. High frequency analysis: single-conductor line with single-conductor line. Technique of protection against conducted disturbances: balanced circuits, chokes, filters, devices for galvanic insulation, overvoltage protection devices. Grounding and bonding. Measurement of conducted emission and susceptibility: receivers, impedance adapters, network impedance stabilizer, coupling capacitors, voltage and current probes, test configurations. Radiated electromagnetic emission: plane wave, electric dipole and magnetic dipoles, near and far field, wave impedance, electromagnetic field radiated from electric dipole configurations, radiated electromagnetic emissions from common mode and differential mode currents, the field electromagnetic radiated from single-conductor lines. The electric field and the magnetic field emitted by overhead power lines. Radiated electromagnetic susceptibility of single-conductor lines: Single-wire line excited by a plane wave, incident wave and reflected wave from the ground, propagation equations in the frequency domain, formulations with phase voltages and scattering voltages, the calculation of induced effects. Measurement of radiates emission and susceptibility: antennas, characteristic parameters, electric and magnetic dipoles, broadband antennas, electric field and magnetic field sensors, test configurations: open area test site, shielded rooms, anechoic room, reverberating room, TEM cell, GTEM cell. Electromagnetic shielding: definition of shielding effectiveness, the transmission line model, metallic screens, low frequency and radio frequency shielding, multilayer planar screens, shielding of enclosures, , shieding at power frequency, innovative materials for EM shielding. Electromagnetic compatibility materials. Electromagnetic modeling of composite materials. Absorbent radar materials. Thin films. Transparent metals. Exposure to electromagnetic fields: biological effects at low frequency and high frequency, critical electromagnetic environments, control and protection. Standards and regulations. Laboratory calculation: simulation of real components in the frequency domain, coupling models, simulation of overhead transmission liens, simulation of a coaxial cable above the ground plane, propagation in a coaxial cable, low-frequency and high-frequency crosstalk, filters, electromagnetic emission at low-frequency and high-frequency, radiated susceptibility, hielding effectiveness of flat screens. Laboratory measurement: scattering parameters of real components, propagation along transmission lines and crosstalk, emission and susceptibility of transmission lines, filters, antennas and sensors, shielding effectiveness measurements.

Prerequisite of the course are the following topics: - methods for the analysis and solution of electrical circuits - EM fields in quasi-static approximation - EM field propagation equations - Fundamental of electrotechnics

Teacher notes and additional materials are available on Sapienza Moodle. "Electromagnetic Compatibility", Marcello D'Amore, Siderea Publisher. Recorded lectures and lecture notes are available on the teacher's Classroom channel, which can be accessed using the Classroom code: cvpqioz

Attendance at classes is not mandatory but is strongly recommended.

The exam consists of a single oral test designed to assess the knowledge acquired in the topics covered in the course syllabus.

The course takes place in frontal mode with theoretical lessons, calculation exercises and laboratory exercises