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Antennas

2012-13 Academic year

Lecturer: Maurizio Bozzi  

Course name: Antennas
Course code: 504245
Degree course: Ingegneria Elettronica
Disciplinary field of science: ING-INF/02
L'insegnamento è caratterizzante per: Ingegneria Elettronica
University credits: ECTS 6
Course website: n.d.

Specific course objectives

The aim of the course is to provide students with the basic elements for the design of radio communication links, supplying information about the characterization and design of transmitting and receiving antennas. The course aims to introduce the fundamental principles of antenna theory and to present, in a unified manner, the analysis, design, and measurements of antennas. The most common antenna configurations are introduced, such as linear dipoles, loops, arrays, horn antennas, microstrip antennas, and reflector antennas. Moreover, the basic concepts of integrated antennas, antennas for mobile communications and RFID systems and ultrawide-band (UWB) applications are presented. Fundamentals of antenna measurements are briefly discussed. Furthermore, the course provides information on the most common simulation tools for the antenna analysis and design. A number of hours of practical classes will be spent to this end: during these hours, students can design simple antenna structures, by using dedicated software tools.

Course programme

Basic concepts
Transmitting antennas: radiation pattern, input parameters, radiation efficiency, directivity, gain, bandwidth, polarization of the radiated field. Receiving antennas: reciprocity, effective area, polarization loss, antenna noise temperature.

Simple radiators
Dipoles, loops, slots, patches, open ended waveguides, horn antennas.

Aperture-type antennas
Parabolic reflector antennas, aperture efficiency: illumination-, polarization-, phase-, blockage-, spillover-, surface tolerances- and losses-efficiency. Cassegrain and Gregorian antenna systems, offset reflector antennas.

Arrays
Array factor, mutual coupling, feeding networks, synthesis of the radiation pattern of uniform linear arrays, uniform two-dimensional planar arrays and the infinite array model.

Other types of antennas
Travelling-wave antennas, leaky-wave antennas, integrated antennas, smart antennas, antennas for RFID systems and UWB antennas.

Antenna measurements
Measurement of gain and radiation pattern. Open space and anechoic chamber. Near-field and far-field measurement.

Course entry requirements

The course requires students to know the basics of electromagnetic radiation theory, the geometrical optics and the theory and techniques for the analysis of high frequency circuits.

Course structure and teaching

Lectures (hours/year in lecture theatre): 45
Practical class (hours/year in lecture theatre): 0
Practicals / Workshops (hours/year in lecture theatre): 0

Suggested reading materials

C. A. Balanis. Antenna Theory - Analysis and Design. John Wiley and Sons, Inc, 2005.

Testing and exams

The final test consists on a oral examination. Each student can present a simple antenna design, implemented by the tools introduced during the practical classes, as a basis for the examination discussion.

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