Course detail

EM Waves, Antennas and Lines

FEKT-BEVAAcad. year: 2012/2013

Mobile communication systems are based on the propagation of electromagnetic waves in the environment. Waves are transmitted and received by proper antennas. Antennas have to be completed by a suitable transmission line with high-frequency transmit circuitry and receive one. Wave propagation, antennas and transmission lines can be numerically modeled in computer programs. Lectures are aimed to present the described topics to the beginners in the field.

Language of instruction

Czech

Number of ECTS credits

6

Mode of study

Not applicable.

Guarantor

prof. Dr. Ing. Zbyněk Raida

Department

Department of Radio Electronics (UREL)

Learning outcomes of the course unit

The students become familiar with the properties of electromagnetic field and propagation of waves in free space and on transmission lines, basic methods for solution of typical problems, properties of various types of transmission lines, calculation of their properties and their technical applications.

Prerequisites

Knowledge on secondary-school level is requested.

Co-requisites

Not applicable.

Planned learning activities and teaching methods

Teaching methods are specified in the article 7 of BUT Rules for Studies and Examinations.

Assesment methods and criteria linked to learning outcomes

Tests written during semester (20 points), laboratory exercises (20 points), final exam (60 points).

Course curriculum

1. Propagation of electromagnetic plane wave in free space. Cylindrical and spherical wave. Modeling of wave propagation in COMSOL Multiphysics.
2. Propagation of TEM wave along the transmission line. Parameters of the transmission line. Transforming impedance by the transmission line. Modeling transmission lines in COMSOL Multiphysics.
3. Computing parameters of transmission lines in MATLAB.
4. Electromagnetic wave propagation in waveguide. Modeling waveguides in COMSOL Multiphysics.
5. Elementary antennas (elementary dipole, elementary surface). Parameters of antennas.
6. Antenna arrays. Computing parameters of antenna arrays in MATLAB.
7. Discussion of individual projects.
8. Planar antennas. Modeling planar antennas in ANSOFT Designer.
9. Classification of antennas. Practically used antennas.
10. Electromagnetic wave propagation in real environment.
11. Waves in inhomogeneous media.
12. Basics of computational electromagnetics, commercial programs, practical applications.
13. Discussion of individual projects.

Work placements

Not applicable.

Aims

Presenting basics of electromagnetic field theory and wave propagation to students. Presenting practical approaches to computing parameters of antennas and transmission lines to students.

Specification of controlled education, way of implementation and compensation for absences

Course evaluation is specified by a regulation issued by the lecturer responsible for the course annually.

Recommended optional programme components

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

NOVÁČEK, Z. Elektromagnetické vlny, antény a vedení. Příklady. Elektronický studijní text. https://www.feec.vutbr.cz/et/skripta/urel/Elektromagneticke_vlny_anteny_a_vedeni_Priklady_S.pdf (CS)

Recommended reading

Not applicable.

Classification of course in study plans

  • Programme EECC Bc. Bachelor's

    branch B-EST , 2 year of study, summer semester, compulsory

  • Programme EEKR-CZV lifelong learning

    branch EE-FLE , 1 year of study, summer semester, compulsory

Type of course unit

 

Lecture

39 hod., optionally

Teacher / Lecturer

prof. Dr. Ing. Zbyněk Raida

Syllabus

Waves in free space, plane wave and spherical wave, interference
TEM waves on transmission lines, voltage and current distribution
Impedance transformation.
Smith chart and its application
Impedance matching
Transmission lines and their applications
Radiation of electromagnetic waves
Radiation of antennas and arrays, impedance of antennas, parameters
Kinds and types of antennas, their parameters and applications
Propagation of electromagnetic waves along earth surface
Radiocommunication, kinds of links
Waves in metal waveguides
Waves in inhomogeneous medium, reflection and diffraction

Exercise in computer lab

12 hod., compulsory

Teacher / Lecturer

Ing. David Wolanský
doc. Ing. Petr Kadlec, Ph.D.
prof. Dr. Ing. Zbyněk Raida

Syllabus

Propagation of plane wave in homogeneous medium
Voltage and current distribution and power on trasmission line with TEM wave
Impedance transformation, Smith chart and its application, impedance matching
Radiation and impedance of linear antennas, antenna arrays radiation
Calculation of trasmission line parameters, resonators and their applications
Propagation along the earth surface
Waves in waveguides, Fresnel´s diffraction
Reflection of waves

Laboratory exercise

14 hod., compulsory

Teacher / Lecturer

prof. Dr. Ing. Zbyněk Raida
Ing. Kamil Pítra, Ph.D.
Ing. Petr Všetula, Ph.D.
Ing. Vladimír Hebelka, Ph.D.

Syllabus

Measurement of coaxial transmission line parameters
Measurement of reflexion factor and input impedance
Input impedance measurement of linear antennas
Power on transmission line
Impedance transformation
Measurement of wavelength and reflection factor of waveguide load
Antenna radiation pattern measurements
Baluns and diplexers