Programme

I PART

Introductory concepts:
Linear algebraic systems and their numerical solution
Singular-value decomposition (SVD) of general complex matrices.
Fundamentals of radiation.
Antenna parameters.
Elementary array theory.
Beyond elementary array theory.

Microstrip and Printed antennas:
Overview, basic principles of operation, feeding methods, and radiation characteristics.
Design procedures and CAD formulas.
Circular polarization, broadband and multi-band antennas, and miniaturization.

II PART

Periodic structures:
Introduction, basic theory (space harmonics, Floquet theorem).
Brillouin diagrams.
Bloch analysis.

Leaky-wave antennas (LWAs):
General features and classification.
Design procedures for 1D LWAs.
Fabry-Perot cavity antennas; general features of 2D LWAs

Arrays for wireless communications:
Characterization of the wireless channel.
Arrays and diversity.
Introduction to Multiple-Input/Multiple-Output (MIMO) systems.

Boundary integral equations and the Method of Moments (MoM):
MoM for 1D integral equations; basis and test functions.
MoM for thin wires.
Boundary integral representations of the electromagnetic field and boundary integral equations.
Mixed-Potential Integral Equation (MPIE) in free space.
MoM for MPIE: basis and test functions.
MPIE in layered media.
Sommerfeld integrals, asymptotic extractions, and spatial singularities.
Acceleration techniques for integral and series in electromagnetic problems.
MoM for MPIE: periodic structures (free space and layered media).

III (Numerical simulations with commercial electromagnetic software)

Electromagnetic CAD:
Ansys Designer and FEKO: introduction and general features.
Analysis of microstrip antennas: simple patch antenna, mutual coupling, and array configurations.
Analysis of Frequency Selective Surfaces. (FSSs)

Core Documentation

Teaching material:
• Slides of the lessons

Reference Bibliography

Testi di consultazione: • C. A. Balanis, Antenna theory, analysis and design. New York, NY: Wiley Interscience, 2005, 3a ed. • Y.T. Lo, S.W. Lee, Antenna Handbook. Antenna theory, Volume II, Van Nostrand Reinhold, 1993 • D. R. Jackson, “Microstrip Antennas,” Ch. 7 of Antenna Engineering Handbook, J. L. Volakis, Editor, McGraw Hill, 2007. • D. R. Jackson, S. A. Long, J. T. Williams, and V. B. Davis, “Computer-Aided Design of Rectangular Microstrip Antennas,” Ch. 5 of Advances in Microstrip and Printed Antennas, • K. F. Lee and W. Chen, Eds., John Wiley, 1997 • D. Guha e Y. M. M. Antar, Eds., Microstrip and printed antennas: New trends, techniques and applications. Wiley, 2011. • R. E. Collin and F. J. Zucker, Antenna theory. New York, NY: McGraw-Hill, 1969. • D. Tse and P. Viswanath, Fundamentals of Wireless Communication, Cambridge University Press, 2005. • K. F. Warnick, Numerical methods for engineering: An introduction using Matlab and computational electromagnetics. Raleigh, NC: SciTech Publishing Inc, 2011. • D. B. Davidson, Computational electromagnetics for RF and microwave engineering. New York: Cambridge University Press, 2011. • R. C. Booton, Computational methods for electromagnetics and microwaves. New York, NY: Wiley, 1992, 2a ed. • A. F. Peterson, S. L. Ray e R. Mittra, Computational methods for electromagnetics. New York: IEEE Press, 1997.

Type of delivery of the course

The following activities are foreseen: lectures, seminars, numerical simulations with commercial electromagnetic software

Type of evaluation

The evaluation is based on two oral open questions on topics covered in the course. There is a on-going test, not mandatory, which consists of an open question on the first (I) part of the course. In case of a positive outcome of the on-going test, the final oral exam will be based on a single open question on the second (II) part of the course. "During the COVID-19 emergency period, the examination will be carried out in accordance with the provisions of art.1 of the Rectoral Decree no. 703 of May 5, 2020, i.e., as an ORAL exam- remote session"