FACULTY

APPLIED TECHNOLOGIES

DEPARTMENT

AIRCRAFT TECHNOLOGY ENGINEERING

LEVEL OF STUDIES

UNDERGRADUATE

MODULE CODE

AE4120T

SEMESTER OF STUDIES

^7th

COURSE TITLE

TRANSMISSION OF E/M WAVES AND AIRCRAFT ANTENNAS 

INDEPENDENT TEACHING ACTIVITIES

TEACHING HOURS PER WEEK

CREDIT UNITS

Lectures

3

4

Practice

2

2

COURSE TYPE

Specialty course

PRE-REQUIRED COURSES:

TEACHING AND EXAMINATION LANGUAGE

GREEK

THE COURSE IS OFFERED TO ERASMUS STUDETNS 

COURSE WEBSITE (URL)

http://ahatzi.teiste.gr/?page_id=10

Learning Objectives

The purpose of the course is to help students understand the basic mechanisms/phenomena of the E/M wave wireless transmission and the atmospheric structure. In addition, students should become familiar with the parameters defining antennas and the operating principles and design matters of special antenna types used on aircraft.  

After successfully completing the course, students should be able to:

·                     identify and understand the way of E/M wave transmission in the atemosphere.

·                     understand the peculiarities and differences of the various atmospheric layers.

·                     understand the behavior and use of the various antenna types and be able to distinguish and classify them.

·                     apply their knowledge in order to perform basic design calculations for certain basic antenna types.

·                     analyze, compose design solutions and evaluate comparatively the anetenna type according to the requirements of each particular coupling.

·                     identify the particularities that aircraft antennas present.

·                     Work individually or collaborate in a group, to solve realistic problems regarding E/M wave transmission and antennas.

General Skills

·                  Search, analysis and combination of data and information with the use of the necessary technologies

·                  Autonomous work

·                  Group work  

·                  Development of free, creative, critical thinking

Unit 1: Electromagnetic waves

 Maxwell equations, electromagnetic field in homogenuous environment, wave equation, plane wave, vertical vectors E and H and their dependence on the environment.

Unit 2: Electromagnetic wave transmission I

Transmission forms, atmospheric structure (troposphere, stratosphere, ionosphere) sky wave, critical frequency, Maximum Usable Frequency, skip distance, optimum operating frequency.

Unit 3: Electromagnetic wave transmission II 

Ionospheric irregularities, multiple skip transmission, transmission through space, effect of earth sphericity , waveguiding effect.

Unit 4: Antennas – I

Radiation of small current element, radiation power and resistance, transmission from dipole λ/2, application on short antennas, active length and height of radiation, field intensity in direct transmission point, voltage produced across the terminals of a receiving antenna.

Unit 5: Antennas II

Antenna characteristics, radiation diagram, Χαρακτηριστικά κεραιών, διάγραμμα ακτινοβολίας, gain, directional gain, directivity, antenna efficiency, transmission between antennas , transimpedance, polarization,  active height. Basic elements of transmission lines,  antenna adjustment.

Unit 6: Various types of antennas

Isotropic, Half wave dipole antenna, half-wave folded dipole antenna, Quarter-wave vertical antenna, Slot antenna, Yagi antenna, Parabolic antenna. 

Unit 7: Practical antennas -I

               VLF and  LF antennas,  MF and HF antennas

Unit 8: Practical antennas -II 

 V antennas, rhombic antennas, VHF and UHF

Unit 9: Aircraft antennas I

Automatic Direction Finder (ADF), High Frequency (HF) antennas, Marker beacon antenna,   Omnidirectional Radio Range antennas (VOR), ILS localizer antennas, Very high frequency communications antennas,  Emergency Locator Transmitters (ELT), rocket antennas and conformal antenna devices. Basic elements of transmission lines, antenna adjustment. 

Unit 10: Aircraft antennas II

Ultra High Frequency communications antennas (UHF), glide slope antennas, DME / TACAN antennas, Air Traffic Control  (ATC) transponder antennas,  GPS system antennas, radio altimeter antennas, Microwave Landing System antennas  (MLS), weather radar antennas, satellite communication antennas (satcom antennas), radar and electronic war antennas.

TEACHING METHOD

Face to face in the classroom

USE OF INFORMATION AND COMMUNICATION TECHNOLOGIES

·                     Special antenna design software 

·                     Support of learning procedure through the use of e-class platform

·                     Use of Internet

TEACHING ORGANIZATION

STUDENT EVALUATION

Examinations take place at the end of the semester and include a written test on the material taught. Examinatios are carried out in Greek, use of tutor's notes are not allowed and include.

•    Short answer questions or Multiple choice questions

•    Problem solving questions focusing on antenna design and/or E/M waves analysis and transmission

-Suggested Bibliography :

Βιβλίο [18548842]: Κεραίες ασύρματες ζεύξεις, Καψάλης Χ., Κωττής Π.

Βιβλίο [50655967]: Κεραίες, 3η Έκδοση, Kraus John. - Marhefka R.

Βιβλίο [14517]: Εισαγωγή στη Διάδοση Ηλεκτρομαγνητικών Κυμάτων, Πακτίτης Σπύρος Α., Νασιόπουλος Αθανάσιος

Βιβλίο [32998396]: Συστήματα Επικοινωνίας Αεροσκαφών, Χατζηευφραιμίδης Αντώνης

Βιβλίο [11213]: Διάδοση ηλεκτρομαγνητικών κυμάτων, Ρωμανίδης Ανδρέας Κ.

-Συναφή επιστημονικά περιοδικά: