Academic Staff
Faculty in charge:
στρατάκης δημήτριος
Stratakis DImitrios
Assistant Professor
Αναπληρωτής Καθηγητής
+30 2810-379891, +30 2810-379760
COURSE CONTENTS
THEORY
The aim of the course is to provide an overview of standard and wireless communication systems. The theory of electromagnetic waves is presented as a means to the understanding of the electromagnetic behavior of practical communication systems. Additionally, the basic characteristics of antennas are explained and various antenna architectures are analyzed.
Layout:
- Time-varying fields: Maxwell's equations in vacuum and in matter, electromagnetic (EM) wave equation, energy in EM waves, the Pointing vector.
- Plane EM waves:Definition of Plane wave, polarization, phase and group velocity.
- Reflection and refraction of plane EM waves:Snell law, Fresnel equations, amplitude reflection and transmission coefficients, total internal reflection-Fibre optics, Brewster angle- polarizers, standing waves
- Waveguides:Geometrical optics, TE, TM and TEM modes, slab and cylindrical dielectric waveguides, power and loss.
- Transmission lines:Circuit theory and field theory, basic field cell, uniform transmission line of two conductors with infinite length, Z0, uniform transmission line terminated on a load, Smith diagram.
- Basic antenna characteristics:Fresnel and Fraunhofer field, current distribution, radiation power, Radiation resistor, loss resistor, performance, Input resistor, radiation diagram, Half power beam width, Directionality, Friis equation.
- Basic antenna types:Basic dipole, antenna bronchus, antenna ë/2, helical antenna, influence of the ground on the performance of horizontal and vertical antennas, antenna Marconi
- Sets of antennas:Sets of isotropic sources, antenna Yagi-Uda, Propagation of E/M waves in the terrestrial environment, ground waves, ionosphere waves, Frequency bands: characteristics and applications.
LABORATORY
Open source software will be used for the laboratory exercises. They will cover:
- Operation of the program NEC4WIN95VM
- Radiation from an infinitesimal dipole.
- λ/2 dipole antenna
- Resonance Phenomena.
- Vertical antennas
- Special cases of linear antennas
- Antenna Arrays
- Loop antennas
- Helix antennas
- Yagi-Uda antennas
RECOMMENDED BIBLIOGRAPHY
- “Ηλεκτρομαγνητισμός”, 4η εκδ., Εκδόσεις Τζιόλα, Θεσσαλονίκη 1993, ISBN 960-7219-23-4.
- “Κεραίες”, 2η εκδ., Εκδόσεις Τζιόλα, Θεσσαλονίκη 1998, ISBN 960-7219-63-5 [Πρωτότυπο: J.D. Kraus, Antennas, McGraw-Hill, 2nd ed., 1988].
- Δ.Μαρκόπουλου, “Μικροκυματικά Τηλεπικοινωνιακά Συστήματα – Ι”, Ίων, 1995, ISBN 960-405-451-1.
- Δ.Μαρκόπουλου, “Μικροκυματικά Τηλεπικοινωνιακά Συστήματα– ΙΙΙ”, Ίων, 1994, ISBN 960-405-450-3.
- D.K.Cheng, “Fundamentals of Εngineering Εlectromagnetics”, Addison- Wesley, 1993, ISBN 0-201-56611-7.
- Θ.Δ.Τσιμπούκη, “Εισαγωγή στη Βασική Θεωρία του Ηλεκτρομαγνητικού Πεδίου, Τόμος ΙΙΙ: Διάδοση Ηλεκτρομαγνητικού Κύματος”, Εκδ. University Studio Press, 1991, ISBN 960-12-0262-5.
- A.Ishimaru, “Electromagnetic Wave Propagation, Radiation and Scattering”, Prentice-Hall, 1991, ISBN 0-13-273871-6.
- C.A.Balanis, “Advanced Engineering Electromagnetics”, Wiley, 1989, ISBN 0-471-50316-9.
- Χ. Καψάλη και Π. Κωττή, “Κεραίες - Ασύρματες Ζεύξεις”, Σημειώσεις Ε.Μ.Π., Αθήνα, 1999.
- C. A. Balanis, “Antenna Theory: Analysis and Design”, J.Wiley & Sons, 1982, ISBN 0-471-60352-X.
- Σ. Κουρή, “Στοιχεία Θεωρίας Κεραιών και Διαδόσεως Ηλεκτρομαγνητικών Κυμάτων”, Εκδ. Ζήτη, Θεσσαλονίκη, 1994, ISBN 960-431-274-X.
- Ι. Ν. Σάχαλου, “Κεραίες”, Εκδ. Αβαζής-Ζουμπούλης, Θεσσαλονίκη, 1986.