Teacher

prof. Michele MIDRIO

Credits

9 CFU

Language

Italian

Objectives

Basic concepts of electromagnetic wave propagation. Free space propagation and antennas. Electric and magnetic field, energy and power density of electromagnetic waves. Phase and group velocity, chromatic dispersion. Antenna: basic concepts, parameters. Thin linear antennas. Metallic and dielectric waveguides. Experimental characterization of antenna parameters. Antenna arrays. Radio links. Planning of radio-networks coverage.

Acquired skills

- Comprehension of terms and parameters in use for the study of electromagnetic wave propagation.
- Comprehension of terms and parameters in use for the study of propagation of high-frequency signals in transmission lines.
- Comprehension of terms and parameters in use for the study of antennas.
- Comprehension of terms and parameters in use for guided propagation.
- Computation of field radiated by a single or an array of antennas.
- Design, optimization and characterization of thin linear antennas.
- Design of an antenna radio link.
- Design of metallic and dielectric waveguides.

Lectures and exercises (topics and specific content)

Basic concepts: Maxwell's equation in time and harmonic domain; magnetic vector potential; Poynting vector and theorem; uniqueness and reciprocity theorems (6 hours).
Transmission lines: telegraphist’s equations; characteristic impedance of a transmission line; reflection of high-frequency signals from a mismatched load; standing wave ratio, complex power in a transmission line; impedance matching (14 hours).
Free space propagation: plane waves; reflection and refraction of plane waves; Snell's law; Fresnel's formulas; layered media; electromagnetic waves in conducting media; phase and group velocity, chromatic dispersion (14 hours).
Metallic and dielectric waveguides: wave propagation In metallic waveguides; TE and TM modes; cut-off frequency; fundamental mode; monomodality region; wave propagation in dielectric waveguides; hybrid modes; slab waveguide; optical fiber(16 hours).
Antennas: basic concepts; short dipole antenna; loop antenna; thin linear antennas; aperture antennas; antenna parameters; array of antennas (16 hours).
Exercises: exercises on above topics (12 hours).
Labs: experimental characterization of the parameters of a thin linear antenna: input impedance, matching and radiation pattern (12 hours).

References

- M. Midrio - Campi Elettromagnetici - Edizioni SGE Padova
- M. Midrio – Propagazione guidata – Edizioni SGE Padova
- M. Midrio - Esercizi di Campi Elettromagnetici - Edizioni SGE Padova 

Type of exam

Written and oral