Dettagli sull'Insegnamento per l'A.A. 2019/2020

Prerequisiti

The student must know the theory of electromagnetic fields, transmission lines, field theory for guided waves and electric circuits

Obiettivi

The objective of this course is to introduce to the students the basics of remote sensing and radiowave propagation. On successful completion of this module, the student should be able to model interactions between electromagnetic radiation and natural media, to develop suitable inversion methods for the retrieval of environmental parameters, to manage several radiowave propagation models and to calculate the link budget for many radio communications systems

Sillabo

• Remote Sensing
• Physical properties of the atmosphere; interaction of the e.m. wave with atmospheric gases and particles; radiative transfer equation
• Radiometer systems. Passive remote sensing of the atmosphere; inverse problem and inversion techniques; ground- and satellite-based radiometry: retrieval of atmospheric temperature, water (vapour and liquid), precipitations
• Passive remote sensing of the sea surface properties: sea surface temperature, salinity, wind speed at the surface; detection of oil spills; monitoring of sea ice
• Passive remote sensing of solid earth; bare soil and vegetation emission
• Radio-wave propagation: physical phenomena, materials, frequency bands and applications
• Geometrical Optics: eikonal equation, ray optics in homogeneous, isotropic, lossless media; flux tube, wavefront, principal radii of curvature, spreading factor, ray trajectory. Reflection from metallic and dielectric surfaces. Fermat’s principle. Basics of Geometrical Theory of Diffraction. Ray tracing techniques
• Path loss: Friis’s formula, fast fading, slow fading, two-rays flat-Earth model. Laboratory activity: path loss measurement of some radio-links
• Diffraction loss: half-plane diffraction, Fresnel’s ellipsoid, knife edge diffraction, Lee’s model, aperture diffraction, multiple knife-edge, Deygout’s method, Giovannelli’s method
• Terrestrial path-loss models: macro-cell, micro-cell, pico-cell, empirical and semi-empirical path-loss models, Longley-Rice model, Okomura-Hata model, Ikegami model, dual-slope model
• Satellite radio-link: leo,meo and geostationary satellites, up-link, down-link, non-regenerative transponder, Earth station, reflector antennas, antennas parameters, gain, beamwidth, gain fall-out. Polarization mismatch and misalignment losses, link budget for a geostationary satellite. ITU models for attenuation by rain, clouds, sand and atmospheric gases
• Ionospheric propagation: layered model of ionosphere, Dielectric constant of ionized gas, MUF, skip distance. Effects of the Earth’s magnetic field, conductivity tensor, Appleton-Hartree equation, ordinary wave, extraordinary wave, circularly polarized waves, Faraday’s rotation. Attenuation, delay and depolarization

Descrittori di Dublino

Alla fine del corso, lo studente dovrebbe

Testi di riferimento

• Saunders, Antennas And Propagation for Wireless Communication Systems , Wiley.    
• Collin, Antennas and radiowave propagation , McGrawHill.    
• F.Ulaby, R. Moore, A. Fung, Microwave Remote Sensing , Artech House. (vol. 1-3) 1981-1986.    
• Maral, Bousquet, Satellite Communications Systems: Systems, Techniques and Technology , Wiley.    

Modalità d'esame

Written and oral exam

Note

• Si veda anche la pagina sul vecchio sito di ingegneria: http://www.ing.univaq.it/cdl/scheda_corso.php?codice=I0030_I2T

Aggiornamenti alla pagina del corso

• A.A. 2012/2013
• A.A. 2013/2014
• A.A. 2014/2015
• A.A. 2015/2016
• A.A. 2016/2017
• A.A. 2017/2018
• A.A. 2018/2019
• A.A. 2019/2020