|SCIENTIFIC DISCIPLINARY SECTOR||ING-INF/02|
The Electromagnetic Fields course provides basic electromagnetic skills, including the fundamental laws of the electromagnetic field and the principles of propagation and diffusion, necessary for the understanding of information technologies.
The course provides basic electromagnetic skills. The goal is to enable the student to be able to evaluate the electromagnetic aspects involved in electronic design, as well as acquire the necessary fundamentals for the study of antennas, guided propagation and electromagnetic compatibility.
The course provides basic electromagnetic skills, which concern the fundamental laws of electromagnetism, the basics of electromagnetic propagation and radiation. These contents, fundamental in the field of Information Engineering, are discussed in the light of their applicability to practical engineering problems. The goal is to put in a position to be able to evaluate the electromagnetic aspects involved in electronic design and in the study of equipment based on information technologies, as well as acquire the necessary fundamentals for the study of antennas, guided propagation and electromagnetic compatibility.
The course includes theoretical lessons and classroom exercises.
Essential contents: Review of coordinate systems and vector operators. Electromagnetic field vectors and their sources (charges and currents). Maxwell's equations in global and local forms. Constitutive equations for dielectrics. Ohm's law. Interface, boundary and initial conditions. Continuity equation. Lorenz force. Harmonic fields. Complex dielectric permittivity and magnetic permeability. Poynting's theorem, conservation of energy, power density. Ideal and uniform transmission lines. Characteristic impedance. Load impedance. Reflection coefficient. Stationary waves. Distributed-parameter circuits (and comparison with lumped-parameter circuits). Wireless electromagnetic propagation. Wave equations. Electromagnetic waves. Plane and spherical waves. Polarization of the waves. Reflection and transmission of plane waves from plane surfaces. Normal and oblique incidences. Propagation in conducting media. Propagation in good conductors. Propagation and attenuation constants. Electromagnetic radiation. Near-field and far-field regions. Electromagnetic potentials. Radiation vector. Radiation from simple sources. The example of the elementary dipole. Antennas parameters. Radiation pattern. Gain and gain functions. Directivity and directivity patterns. Input impedance. Radiation efficiency. Receiving antennas. Equivalent area and its relationship with the gain. Introduction to finite length dipoles and parabolic antennas.
1) S. Ramo, J. R. Whinnery, T. Van Duzer, "Fields and waves in communications electronics", Franco Angeli Editore, 1984.
2) G. Franceschetti, "Electromagnetic fields", Boringhieri, 1983.
3) G. Conciauro, L. Perregrini, "Fundamentals of electromagnetic waves," McGraw-Hill 2003.
Notes prepared by the teacher are also available.
Office hours: On appointment.
All class schedules are posted on the EasyAcademy portal.
The exam consists of an oral test at the end of the lessons.
Since the exam is constituted only by an oral exam, the students will have to answer questions from the examination board concerning both the theoretical aspects presented during the course and the contents of the classroom exercises.