Università Roma Tre

Fundamentals of electromagnetic radiation and antenna parameters. Radiation from a short current filament. Radiation from a small current loop. Radiation from arbitrary current distribution. Half-wave dipole antennas. Antenna impedance. Folded dipole, short dipole, and monopole antennas.

Receiving antennas. Reciprocity theorem and effective area. Polarization mismatch. Friis transmission formula. Noise in communication systems. Noise temperature of an antenna.

Introduction to antenna arrays. Uniform one-dimensional arrays. End-fire and broadside arrays. Uniform two-dimensional arrays. Array design. Binomial and polynomial arrays, Chebyshev method. Feeding networks, Butler Matrices. Parasitic and log-periodic arrays.

Aperture antennas. Analysis and synthesis. Radiation from a planar aperture: the Fourier transform method. Radiation from rectangular and circular aperture. Application of field-equivalence principles to aperture radiation. Open waveguides and horn antennas. Ray optics. Microwave lens. Paraboloidal reflector antennas: efficiency, directivity, cross-polarization. Induced current method. Feeds with low cross-polarization. Dual reflector systems. Radiation from slots. Microstrip antennas. Artificial periodic media. Electromagnetic Band-Gap media and their application to antennas.

Scattering of the radiation: general environment and canonical cases. Plane-wave scattering by a conducting cylinder, E- and H- polarization. Dielectric cylinder.

A. Paraboni, M. D’Amico, “Radiopropagazione” Mc Graw-Hill Libri Italia.
A. Paraboni, "Antenne", Mc Graw-Hill Libri Italia.
C. Balanis, "Antenna theory, analysis and design", 3rd edition, Wiley,
Robert E. Collin, "Antennas and Radiowave propagation", McGraw-Hill Book Company.

Propagation between fixed points: presence of earth, surface waves and reflection from flat surface. Refractive index of a ionized medium. Ray curvature a ionospheric plasma.

Teaching material:
- Notes and slides of the Course available on the Moodle area of the course