Portale di Ateneo - En.Unibs.it

Antennas and their applications.
Introduction
Plane waves and spherical waves. Polarization of the electromagnetic
field. Hertz's dipole.
Fundamental parameters of antennas
Radiation pattern, directivity, gain, effective area and input impedance.
Friis transmission formula.
Potential functions
Duality theorem. Equivalence theorem. Magnetic and electric vector
potentials. Green's functions.
Wire antennas
Small dipole. Linear wire antennas: radiation patterns and input
impedance. Mutual coupling between wire antennas.
Arrays
N-element linear array: analysis and synthesis.
Aperture antennas
Diffraction theory and radiation integrals . Rectangular apertures and
horn antennas.
Patch antennas
Cavity model for the rectangular microstrip patch antenna; design
examples.
Laboratory exercises on antennas and wireless systems.
Exercise 1
Design and simulation of a patch antenna.
Exercise 2
Measurement of the radiation pattern.
Exercise 3
Experimental characterization of WLAN antennas by means of a Vector Network Analyzer.