Ing Ind - Inf (Mag.)(ord. 270) - MI (474) TELECOMMUNICATION ENGINEERING - INGEGNERIA DELLE TELECOMUNICAZIONI

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094784 - FUNDAMENTALS OF ELECTROMAGNETIC FIELDS

Obiettivi dell'insegnamento

The main objective of the course is to introduce the fundamentals of electromagnetic fields, starting from the sources of the electric and magnetic fileds, to the separate dissertation on the electric and magnetic fields in the static domain, to the treatise of electromagnetic fields in the time varying domain. This course is intended to lay solid foundations for the follow-up courses investigating more in detail the role of electromagnetic waves in ICT applications (e.g. guided and free-space transmission of information). Some elements of such applications are already preliminarily introduced in this course (e.g. transmission lines and plane waves).

Risultati di apprendimento attesi

After passing the exam, the student:

knows the basic principles and laws regulating electromagnetic fields, both in the static domain and in the time varying domain, and their interaction with the environment (e.g. metals, dielectric media, magnetic media, …)

knows the main features and working principles of systems and applications based on electromagnetic fields

can solve simple problems involving electromagnetic fields

knows how to use a simple software tool for the analisys and design of a system based on transmission lines

possesses the knowledge necessary to define the main specifications of a simple transmission line based system

Argomenti trattati

Theory

Basics of scalar and vector fields and vector differential operators. Review of electrostatics and magnetostatics in free space and in materials.

Maxwell’s Equations. Definition of time-varying regime. Integral and differential forms of Faraday's law, Ampere-Maxwell’s law and Gauss laws. Poynting’s theorem. Maxwell’s equation in sinusoidal steady state regime.

Plane waves. Definition and main properties of plane waves. Plane wave solution of Maxwell’s equations in lossless and lossy media. Polarization of plane waves. Propagation in dielectrics and good conductors. Orthogonal incidence of plane wave on double-layer structure: reflection and transmission.

Transmission lines. Transmission line equations and their solution in terms of voltage and current waves and associated fields. Characteristics and input impedances. Incident and reflected waves. Reflection and transmission coefficients and standing wave ratio. Power balance. Lossy transmission lines.

Practice

Examples of calculation of elettrostatic and magnetostatic fields with elementary sources.

Examples of calculation of the electromagnetic field in the time varying domain.

Simple problems involving the propagation of plane waves in free space and in different materials.

Calculation of the main parameters characterizing tranmission lines.

Calulation of the impedance and of power transfer along a transmission line (also lossy ones).

Prerequisiti

Trigonometry, calculus with complex numbers, basic notion on vectors, differential and intergal calculus.

Modalità di valutazione

The exam includes a written test and an oral test:

The written test consists in the solution of 4 problems respectively on: electrostatic, magnetostatic, propagation of plane waves, transmission lines. This test aims at assessing the ability of the student to solve simple problems using the tools and concepts presented during the lectures. The test is open book: the student can use any material (e.g. personal notes, books) during the written test, but electronic devices that can connect to the web are not allowed.

The oral test aims at evaluating the understanding of the physical concepts at the basis of electromagnetic fields. The student will be typically asked to explain and discuss, in a conversational way, key physical concepts, rather than deriving analytical expressions.

Bibliografia

B. Guru and H. Hiziroglu, Electromagnetic field theory fundamentals, Editore: Cambridge University Press, Anno edizione: 2004, ISBN: 0521830168
C. Riva and G.G. Gentili, Appunti di campi elettromagnetici, Editore: Libreria Cortina, Anno edizione: 2013

Forme didattiche

Tipo Forma Didattica

Ore di attività svolte in aula

(hh:mm)

Ore di studio autonome

(hh:mm)

Lezione

30:00

45:00

Esercitazione

20:00

30:00

Laboratorio Informatico

0:00

0:00

Laboratorio Sperimentale

0:00

0:00

Laboratorio Di Progetto

0:00

0:00

Totale

50:00

75:00

Informazioni in lingua inglese a supporto dell'internazionalizzazione

Insegnamento erogato in lingua
Inglese

Disponibilità di libri di testo/bibliografia in lingua inglese

Possibilità di sostenere l'esame in lingua inglese

Disponibilità di supporto didattico in lingua inglese