ANTENNAS

Ingegneria Elettronica ANTENNAS

0622400003
DIPARTIMENTO DI INGEGNERIA INDUSTRIALE
ELECTRONIC ENGINEERING
2014/2015

OBBLIGATORIO
YEAR OF COURSE 1
YEAR OF DIDACTIC SYSTEM 2012
PRIMO SEMESTRE
CFUHOURSACTIVITY
990LESSONS
Objectives
THE COURSE GIVES TO THE STUDENTS PROPER TOOLS FOR ANALYZING AND SYNTHESIZING ANTENNAS, AS WELL AS, IT PROVIDES THE FUNDAMENTALS OF A RADIO LINK DESIGN. IN PARTICULAR, THE TECHNIQUES FOR THE ANALYSIS AND DESIGN OF HIGH FREQUENCIES ANTENNAS ARE STUDIED IN DETAIL.
Prerequisites
TO PROFITABLY REACH THE GOAL OF THE COURSE, THE FOLLOWING REQUIREMENTS ARE NEEDED: A) GOOD KNOWLEDGE OF MATHEMATICAL ANALYSIS AND PHYSICS; B) SOUND KNOWLEDGE OF THE FUNDAMENTAL LAWS OF ELECTROMAGNETICS, ACQUIRED IN A FIRST LEVEL COURSE OF ELECTROMAGNETIC FIELDS.
Contents
MAXWELL'S EQUATIONS. BOUNDARY CONDITIONS. RADIATION FROM ELECTRIC AND MAGNETIC SOURCES, FAR-FIELD CONDITIONS. IMAGE THEORY. LINEAR WIRE ANTENNAS. HALLEN'S INTEGRAL EQUATION. PARAMETERS CHARACTERIZING A TRANSMITTING OR RECEIVING ANTENNA. RECIPROCITY THEOREM. FRIIS’ TRANSMISSION EQUATION. RADAR RANGE EQUATION. EQUIVALENCE THEOREM. RADIATION FROM AN OPEN-ENDED RECTANGULAR WAVEGUIDE. PLANE-WAVE REPRESENTATION OF THE FIELD. ASYMPTOTIC EVALUATION OF THE FAR-FIELD. RADIATION FROM APERTURES. NEAR-FIELD-FAR-FIELD TRANSFORMATION WITH PLANE-RECTANGULAR SCANNING. LINEAR ARRAYS. SCHELKUNOFF POLYNOMIAL METHOD. BINOMIAL ARRAY. PATTERN SYNTHESIS OF AN ARRAY BY THE FOURIER METHOD. DOLPH-TCHEBYSCHEFF ARRAY. PHASED ARRAYS. YAGI-UDA ARRAYS. PLANAR ARRAYS. METHOD OF MOMENTS (MOM). SOLUTION OF HALLEN'S INTEGRAL EQUATION BY THE MOM. REFLECTION OF RADIO WAVES FROM THE EARTH'S SURFACE. GROUND-WAVE PROPAGATION OVER A FLAT OR SPHERICAL EARTH. SIGNIFICANT VOLUMES OF RADIO TRANSMISSION. LINE-OF-SIGHT RADIO PROPAGATION OVER HILLS. EFFECT OF THE TROPOSPHERE ON GROUND-WAVE PROPAGATION. PROPAGATION OF RADIO WAVES BY TROPOSPHERIC SCATTERING. PHYSICAL OPTICS (PO). UNIFORM THEORY OF DIFFRACTION (UTD): GEOMETRICAL OPTICS FIELDS, EDGE DIFFRACTED FIELD. FIELD DIFFRACTED BY A WEDGE. KELLER'S LAW OF EDGE DIFFRACTION. RAY-FIXED COORDINATE SYSTEMS. DIFFRACTION COEFFICIENTS FOR A HALF-PLANE AND FOR A WEDGE. RADAR CROSS SECTION (RCS) OF A CIRCULAR DISH AND OF A DIHEDRAL CORNER REFLECTOR. EVALUATION OF THE FIELD RADIATED BY A CENTERED PARABOLIC REFLECTOR VIA THE UTD, THE APERTURE METHOD, THE PO, AND THE EQUIVALENT EDGE CURRENT METHOD.
Teaching Methods
THE COURSE MAINLY INCLUDES THEORETICAL LESSONS, BUT THERE ARE ALSO SOME NUMERICAL AND LABORATORY PRACTICES. THE NUMERICAL PRACTICES ARE CONCERNED WITH THE USE OF SOFTWARE TOOLS FOR THE ANALYSIS AND DESIGN OF ANTENNAS. WHEREAS, THE LABORATORY ONES DEAL WITH THE MEASUREMENTS OF SOME ANTENNA PARAMETERS. FOR INSTANCE, THE DETERMINATION OF THE ANTENNA RADIATION PATTERN FROM FAR-FIELD OR NEAR-FIELD MEASUREMENTS PERFORMED IN AN ANECHOIC CHAMBER. SOME SEMINARS ON THE NONREDUNDANT SAMPLING REPRESENTATIONS OF THE ELECTROMAGNETIC FIELD AND THEIR APPLICATIONS TO THE NEAR-FIELD-FAR-FIELD TRANSFORMATION TECHNIQUES ARE ALSO PLANNED.
Verification of learning
AN ORAL EXAMINATION WILL VERIFY THE REACHING OF THE FIXED GOALS.
Texts
C.GENNARELLI, F.D’AGOSTINO, ELEMENTI DI TEORIA DELLE ANTENNE, EDIZIONI SCIENTIFICHE FLORIO, NAPOLI, 1998.
C.GENNARELLI, DISPENSE DEL CORSO DI ANTENNE.
M.DOLUKHANOV, PROPAGATION OF RADIO WAVES, MIR PUBLISHERS, MOSCOW.
More Information
THE COURSE IS TAUGHT WITH OBLIGATORY ATTENDANCE AT THE FACULTY OF ENGINEERING. SCHEDULE AND CLASSROOMS ARE AVAILABLE AT HTTP://WWW.INGEGNERIA.UNISA.IT/.
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