This information sheet indicates how the course will be organized at pandemic code level yellow and green.
If the colour codes change during the academic year to orange or red, modifications are possible, for example to the teaching and evaluation methods.

# 4-Telecommunication 1

 Course Code : 1529FTITLC Study domain: Electronics Academic year: 2020-2021 Semester: 2nd semester Contact hours: 24 Credits: 3 Study load (hours): 84 Contract restrictions: No contract restriction Language of instruction: English Exam period: exam in the 2nd semester Lecturer(s) Raf Catthoor

### 3. Course contents *

Introduction: decibels, the electromagnetic spectrum

Transmission lines: network approach

• Line parameters R, G, L, C; travelling sine wave on a lossless line
• Travelling sine wave on a lossy line
•               The wave equation and solution
•               Characteristic impedance; propagation constant; attenuation coefficient
•               Example: coaxial line
• Group velocity and dispersion
• The transmissielijn in time: reflections.
•               The creation of a reflected wave
•               Border conditions at the beginning and end of the line
•               Step response:
•                             voltage and current along the line
•                             voltage at the beginning and at the end of the line as a function of time
•                             Bergeron-diagram
•               Pulse response.
• Reflected waves in sinusoidal regime on a lossless line
•               The relation between V+ and I+ , V- and I-
•               Standing waves; standing wave ratio
•               Vector representation of incident and reflected wave
•               Time domain reflectometry
• Noise and interference
• Summary
• Exercises

Electromagnetic waves

• Electromagnetic plane waves; Pointing vector; Polarisation
• Spherical waves
• Waves propagating between two conducting planes
• Reflection and refraction of plane waves; border conditions at the boundary dielectricum/dielectricum and dielectricum/ideal conductor; Brewster angle; Total internal reflection

Transmission line examples

• Coaxial line
• Microstrip line
• Waveguides: modes, cutoff frequency; coupling with coax
• Twisted pair

Antennas and arrays

• Reciprocity
• Antenna impedance, antenna efficiency, effective area
• Dipoles and related antennas
• horn antennas, dish antennas
• Arrays

Waves in free space

• Sending and receiving in free space; Friis transmission equation
• Noise