Description
In the Electromagnetic Wave Propagation course the student explores the analysis and design of atmospheric propagation systems, waveguides and transmission lines. The student is introduced to the atmospheric electromagnetic wave propagation, studying the phenomena that affect the propagation, and learning to dimension and design radiocommunication systems. Waveguides that allow the transmission of electromagnetic waves confined in conductors, and general transmission line theory are also studied. All of these contents will be widely completed in the following year in different courses: Antenna, Systems of Optical Communications, High Frequency Circuits and Advanced Electromagnetism.
Type Subject
Optativa
Semester
Second
Credits
5.00
Previous Knowledge

Electromagnetic Theory

Objectives

The Electromagnetic Wave Propagation program graduates achieve the knowledge and develop the skills following indicated. The course intrinsic objectives are the first two, and the remaining are the transversal ones. These objectives are acquired at different parts of the course:

1. Analyse and design electromagnetic wave transmission systems, as well in the atmosphere as in waveguides or in transmission lines, following the desired rules for the different type of problems.

2. Identify, formulate and solve fields and electromagnetic waves propagation problems in a multidisciplinary frame individually or as member of a group.

3. Know and use the new techniques and electronic learning tools (virtual campus, study guide, document sharing, forums, videoconference systems, shared web blackboards, etc.).

4. Reach and manage information from different sources.

5. Express oneself correctly in a telematic environment, both orally and in writing.

6. Use texts in English as a basic bibliography.

Contents

1.- Atmospheric electromagnetic wave propagation
1.1- Ray theory and reflection phenomena.
1.2- Diffraction phenomena.
1.3- Influence of troposphere and ionosphere.
1.4- Empiric and statistic propagation models.

2.- Guided electromagnetic waves
2.1- Introduction. Field propagation in a waveguide.
2.2- TEM wave propagation. Transmission lines.
2.3- TE and TM wave propagation. Dispersion. Rectangular waveguides.
2.4- Dielectric waveguides. Optical fibre.

3.- Transmission lines
3.1- Electromagnetic behaviour and circuit model of transmission lines.
3.2- Reflection coefficient, impedance, and VSWR in transmission lines.
3.3- Transmission line types.
3.4- The Smith chart. Impedance adaptation.

Methodology

This subject may be followed in two formats, depending on the preference of the student, traditional learning and blended learning. The main difference between both modalities is based on the different physical attendance of the students to the classrooms.

In the traditional learning modality, the exposition of the contents is done by blackboard classes where the teacher explains and reasons the theory and concepts of the subject. In the blended learning modality, the student takes a more active role, in its learning, and have the contents in the virtual campus, where there are an study guide, that: explains briefly the concepts of the course, gives references to the bibliography where these concepts may be extended, contains auto-evaluation questions where the student may have an indication of his degree of learning. In this format, also at least four physical meetings at year are celebrated, where students and teachers meet, to perform small blackboard classes, problems or discussions.

This course has a very important component of resolution of problems. During the year, problems to be solved are given to the students, afterwards the problems will be corrected. The problems are given directly by the teacher (in the traditional learning case), or, in specifically designed electronic wells inside the virtual campus. In the blended learning case, the teacher puts, to be used by everybody, the problem solved with best correction and good presentation.

During the year, the participation in electronic forums is stimulated. In these forums the teacher or also the students, state problems, where students and the teacher give ideas until the solution is achieved. Moreover, during the year, some synchronous on-line meetings are done by using a virtual classroom, where students and teachers use videoconference and can share a web blackboard and slide presentations. In the traditional learning case, this work is done by oral communication presentially at the classroom.

In both formats, references to interesting websites are given, and also the research of additional ones is stimulated. In these websites demonstrations or programs related to the course contents may be found. Also, the extension of the knowledge by the reading of additional bibliography is stimulated.

Evaluation

The work of the student will be evaluated by exams, oral exams, homework, reports of workgroup and with the participation in the laboratory and in the classroom.

A. Exams
C. Quizzes
D. Homework
F. Team reports
J. Classroom participation

The mark of the course consists mainly of the exam marks, being modified by the student activity during the year: works or problems given to the students and with the results of the autoevaluations and participation to the forums, classroom discussions (presential or virtual campus). Exams have two parts: a first theoretical part, usually evaluated with quiz questions (40%), and another part of problems or designs (60%).

Evaluation Criteria

Objetive 1:
- The student should know how to analyse, and also design, using the different tools presented at class, electromagnetic wave transmission systems (in the atmosphere, or in circuits) [A+C+D].
Objetive 2:
- The student should demonstrate his ability to work in group and his capacity of apply knowledge to the practice [F+J].
Objetive 3:
- The student (specially the blended learning, but also the traditional learning) should know and use the technology as an electronic learning environment, i.e.: shared folders, forums, e-mail, virtual classroom (synchronous remote communication, by videoconference and web blackboard), etc. Must be emphasized that all the delivering process of documentation and mark management, in the traditional learning format also is done using the virtual campus [J].

Basic Bibliography

J. R. Regué, M. Ribó, L. Vicent, Propagació d'ones electromagnètiques. Guia d´estudi, Ebook. Enginyeria i Arquitectura La Salle 2008.

M. Ribó, J.R.Regué, L.Vicent, A.M. Sànchez. Problemes de Radiació Electromagnètica, Enginyeria i Arquitectura La Salle, updated every year.

D.K. Cheng, Fundamentos de Electromagnetismo para Ingeniería, Addison-Wesley, 1997.

Additional Material

S. Ramo, J.R. Whinnery, T. Van Duzer, Fields and Waves in Communication Electronics, 3a Ed., Wiley, 1994

C.A. Balanis, Advanced Engineering Electromagnetics, Wiley, 1989