Electromagnetic Waves
| Code: | L.EEC018 | Acronym: | OE |
| Keywords | |
|---|---|
| Classification | Keyword |
| OFICIAL | Telecommunications |
Instance: 2022/2023 - 2S 
| Active? | Yes |
| Responsible unit: | Department of Electrical and Computer Engineering |
| Course/CS Responsible: | Bachelor in Electrical and Computer Engineering |
Cycles of Study/Courses
| Acronym | No. of Students | Study Plan | Curricular Years | Credits UCN | Credits ECTS | Contact hours | Total Time |
|---|---|---|---|---|---|---|---|
| L.EEC | 320 | Syllabus | 2 | - | 6 | 52 | 162 |
Fields changed: Calculation formula of final grade
Teaching language
PortugueseObjectives
The main objectives of this course are to provide students with technical skills (CDIO 1.1 to 1.3) relative to: • Wavephenomena in transmission lines • Transients in transmission lines • Propagation of plane electromagnetic waves inmedia with and without loss • Polarization of electromagnetic waves • Energy carried by an electromagnetic wave •Incidence of electromagnetic waves in different media • Propagation of guided electromagnetic waves • Radiation •Operating principles of antennas. It is also included in this course the development of personal and professional skills inengineering (CDIOs 2.1).
Learning outcomes and competences
To give the fundamental concepts associated with the free and guided propagation and with the radiation of electromagnetic waves. At the end of this curricular unit the student is expected to be able to:-Understand the wave characteristics of the voltage and current in transmission lines
-Analyze transmission lines as circuit elements
-Understand the transient phenomena in transmission lines
-Design of impedance matching networks
- Understand the propgation of plane electromagnetica waves in lossless and lossy media
- Understand the incidence of plane eletromagnetic waves in interfaces with dieletric media and condutctors
-Understand the guiding mechanism of waveguides -Understand the behavior of different waveguides
-Determine the propagation modes and their characteristics
-Compute the oscillation frequency of cavities
-Understand the working principle of optical fibers
-Understand the basic radiation phenomena
-Understand the fundamental parameters of antennas
Working method
PresencialPre-requirements (prior knowledge) and co-requirements (common knowledge)
Field Eletromagnetics e Differential Equations.Program
1. Transmission Lines: Distributed parameters and electrical model of a transmission line; Telegraphist equations and wave propagation in transmission lines; Lines in circuits; The Smith diagram; Impedance matching; Transients.
2. Plane electromagnetic waves: Maxwell equations; Wave equation and Helmholtz equation; Plane waves in lossless and lossy media - phase velocity, intrinsic impedance, polarization, attenuation and phase constants; good conductors; Group velocity; Poynting vector; Interface between different media - reflection and transmission coefficients, Brewster angle, total reflection.
3. Waveguides: TEM, TM and TE waves; Parallel plates, rectangular and circular waveguides; Planar dielectric guides and optical fibers.
4. Antennas and radiation: The elementary electric and magnetic dipoles; Antenna radiation pattern and parameters; Thin linear antennas.
Mandatory literature
David K. Cheng; Field and wave electromagnetics. ISBN: 0-201-12819-5Complementary Bibliography
John D. Kraus; Electromagnetics with applications. ISBN: 0-07-116429-4Demarest; Engineering electromagnetics. ISBN: 0-02-328521-4
Inan, S. I., Inan, A. S., & Said, R. K.; Engineering electromagnetics and waves, Pearson., 2015. ISBN: 9780132662741
Maria João Martins; Propagação e radiação de ondas eletromagnéticas. ISBN: 978-989-752-066-2
Pedro Renato Tavares Pinho; Propagação guiada de ondas eletromagnéticas. ISBN: 978-85-216-2591-9
Teaching methods and learning activities
Theoretical lectures: presentation of the concepts and mathematical tools required for the understanding of the addressed subjects.
Exercise lectures (TP): discussion and solving of relevant problems, and answering some evaluation questions.
Evaluation Type
Distributed evaluation with final examAssessment Components
| Designation | Weight (%) |
|---|---|
| Exame | 60,00 |
| Trabalho escrito | 40,00 |
| Total: | 100,00 |
Amount of time allocated to each course unit
| Designation | Time (hours) |
|---|---|
| Estudo autónomo | 110,00 |
| Frequência das aulas | 52,00 |
| Total: | 162,00 |
Eligibility for exams
Cannot exceed the absence limit in the exercise lectures, ie 25% of those lectures.Calculation formula of final grade
The distributed evaluation is written and includes the resolution of ten question sets to be answered at the end of some exercise lectures. The grading of this component is the average of the individual grades, not taking into account the worsts three. A question set not solved because the student missed the class will be taken as zero.
The final grade (CF) is given by CF=(7*AD+13*E)/20, where E is the grade in the final exam and AD is the grade in the distributed component of the evaluation.
Passing requires a minimum grade of 40% in E and a minimum grade of 10 points in CF..
Special assessment (TE, DA, ...)
Working students are not required to attend the lectures. Students under these conditions can be evaluated by performing a final exam, and the classification of the student will be equal that of the the exam. However, these students may choose to attend the classes, in which case they should sign up for the exercise lectures and submit themselves to the distributed part of the evaluation. This option is irreversible. In this case, the conditions for obtaining frequency in this case are those mentioned above.Students who obtained frequency in previous years are also not required to attend the lectures. Students under these conditions will be evaluated using for the distributed component of the grade the value obtained in previous years. However, these students may choose to attend the classes, in which case they should sign up for the exercise lectures and submit themselves to the distributed part of the evaluation. This option is irreversible.
Classification improvement
Improvement of the final grade: by final exam, with final grade corresponding to the maximum between the grade obtained in that exam and the previous final grade.
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