ANTENNAS AND WIRELESS PROPAGATION

Second cycle degree in ICT FOR INTERNET AND MULTIMEDIA

Language: English

Teaching period: Second Semester

Lecturer: MARCO SANTAGIUSTINA

Number of ECTS credits allocated: 9

Syllabus
 Examination methods: Written and oral exams. Course unit contents: Part I: The propagation. Maxwell and Helmholtz equations in homogeneous media. Sinusoidal Regime, complex vectors and polarization. Electromagnetic waves and transported power (Poynting vector). The electromagnetic potentials. Uniform plane waves in homogeneous media (Poynting vector, wave impedance, phase velocity). The conditions of continuity between different media. Reflection and refraction of plane waves on dielectrics and conductors. Ray optics. Outline of radiation protection policies. A brief introduction to numerical methods for the design of indoor and outdoor wireless coverage. Minimum conditions for the existence and uniqueness of solutions. \ Part II: Antennas. Antenna parameters: radiation intensity, directivity patterns, directivity, gain, efficiency, effective length in transmission. Antennas in reception. Effective length in receiving and effective area. Reciprocity and relationships between parameters in transmission and reception. Examples of parameters. Elementary dipole: far and near fields. Wired antennas (short antennas, half-wave, full-wave dipoles, multi-band and broadband). Antennas with a ground plane (symmetries and image antennas). Equivalent dipole moment of a system of sources. Antenna circuit theory. Antenna impedance and radiation resistance. The scattering parameters. Adaptating and balancing the antennas. The diffraction. Aperture and reflector antennas. Patch antennas. Antenna arrays. Composition factor. Uniform linear arrays. Phased arrays. Smart antennas and MIMO systems. Physical architecture of wireless links (Friis formula and its variations, noise). Satellite communications and radio links. Radio navigation systems (GPS etc.). Antennas for 3G, 4G, 5G, WI-FI and WIMAX. Laboratory of antennas (antenna design with CST during lesson time and experimental characterization in overtime; educational visit to an anechoic chamber)