Unit ANTENNAS
- Course
- Electronic engineering for the internet-of-things
- Study-unit Code
- 70921409
- Curriculum
- Elettronica per l'aerospazio
- Teacher
- Mauro Mongiardo
- Teachers
-
- Mauro Mongiardo
- Cristiano Tomassoni (Codocenza)
- Hours
- 42 ore - Mauro Mongiardo
- 30 ore (Codocenza) - Cristiano Tomassoni
- CFU
- 9
- Course Regulation
- Coorte 2021
- Offered
- 2021/22
- Learning activities
- Caratterizzante
- Area
- Ingegneria elettronica
- Academic discipline
- ING-INF/02
- Type of study-unit
- Obbligatorio (Required)
- Type of learning activities
- Attività formativa monodisciplinare
- Language of instruction
- Italian
- Contents
- Introduction to Antennas and Receiving Radiation Mechanisms. Study of wire antennas. Aperture antennas and arrays.
Examples of design and measurement of antennas. - Reference texts
- R: E: Collin,
Antennas and Radiowave Propagation (Mcgraw Hill Series in Electrical and Computer Engineering) - Educational objectives
- Understand related physical phenomena and antennas in order to provide a unified view of methodologies to address the study of various classes of antenna systems for research and project purposes in telecommunication and aerospace applications.
- Prerequisites
- First degree in Engineering
- Teaching methods
- The course is organized as follows:
Classroom lessons on all subjects of the course;
Classroom exercises with the use of software suitable for solving electromagnetic problems;
Laboratory exercises. - Other information
- The teacher provides teaching material to illustrate the lecture topics in detail
- Learning verification modality
- The exam provides an oral examination, a written test, and possibly the presentation of a technical report.
The oral test consists of a discussion lasting about 30 minutes. Aimed at ensuring the level of knowledge and understanding acquired by the student on the theoretical and methodological content developed in the program. The oral test will also allow student to demonstrate communication skills with language ownership and autonomous organization.
The written test consists in solving theoretical and computational problems. - Extended program
- Fundamentals of electromagnetic radiation, Pointing theorem and fundamental parameters of an antenna
Green function, Radiation from an arbitrary current distribution, Radiation conditions
of Sommerfeld, Hertz dipole, Far and Field Field, Half Dipole, Loop of
Current, Radiation Diagram (D.D.R.), Directivity and Gain, EIRP, Resistance to
Radiation, Directivity Calculation, Effective Area, Gain Measurement, Antennas Impedance.
Reciprocity theorem, Friis formula.
Aperture antennas
Radiation from a flat aperture. Fourier transform method. Radiation from
Rectangular and circular waveguides. Equivalence principle. Horn antennas. Radiation from waveguides
arrays. Geometric optics. Paraboloid Antennas: Efficiency, Directivity,
crosspolarizzazione.
Method of induced currents. Feed with low cross-polarization. left hand and right hand circular polarization. Reflectors
Offset parabolic. Double reflector systems. Slot radiation. Slot Arrays.
Microstrip antennas. Patch antennas. IFA and PIFA antennas.
Dipoles, row antennas and wire antennas
Introduction to Arrays. Multiplication pattern principle.
Arrays broad-side, arrays end-fire. Two-dimensional Arrays. Grating Lobes, Array Matches, planar Array, , Frequency squint, An array array, Power Networks, Synthesis of
Beams, transfer function of an array, calculation of impedance of a dipole,
Balun. Horn design with Mode-Matching theory recalls. CAD systems for antenna design.
Group and laboratory work
Measurements of receiving and transmitting antennas.