The course aims to complete training on antennas received in previous courses, particularly in relation to the study and design of aperture antennas, planar antennas and arrays of antennas. It also introduces the problem of electromagnetic scattering from structures present in the air or in the soil. Areas of application: biomedical industry, electrical, electronics and telecommunications.
teacher profile teaching materials
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, "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.
Mutuazione: 20810153 ANTENNAS AND PROPAGATION in Ingegneria delle tecnologie della comunicazione e dell'informazione LM-27 SCHETTINI GIUSEPPE, BACCARELLI PAOLO
Programme
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.
Core Documentation
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.
teacher profile teaching materials
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.
Mutuazione: 20810153 ANTENNAS AND PROPAGATION in Ingegneria delle tecnologie della comunicazione e dell'informazione LM-27 SCHETTINI GIUSEPPE, BACCARELLI PAOLO
Programme
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.Core Documentation
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.
Type of evaluation
It is possible to undergo to a test 'in itinere' about at half of the Course. If the test is passed, then a final exam on the remaining part of the Course will have to be sustained.