ANTENNAS AND WIRELESS PROPAGATION

Maxwell and Helmholtz equations in homogeneous media. Sinusoidal Regime, complex vectors and polarization. Electromagnetic waves and transported power (Poynting vector). The electromagnetic potentials.
Elementary dipole: far and near fields.
Antenna parameters: radiation intensity, radiation patterns, directivity, gain, efficiency, effective length in transmission. Antenna circuit theory. Antenna impedance and radiation resistance. The scattering parameters. Adaptating and balancing the antennas.
Antennas in reception. Effective length and effective area. Reciprocity and relationships between parameters in transmission and reception. Examples of parameters.
Wire antennas (short, 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.
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).
For the 9 ECTS course: Drude and Lorentz models of the electromangetic response of metals and doped semiconductors, surface plasmons, localized plasmons, plasmonic resonances, optical antennas and their properties, circuit equivalent models of optical antennas in transmitting and receiving modes, antenna efficiency, Purcell factor, optical antenna arrays and metasurfaces.