Subject 'Wave Fields and Antennas'

Year:   2014/2015    2015/2016    2016/2017    2017/2018    2018/2019    

Tallinn University of Technology

To make the students accustomed with the mathematical model of a antennas and symbolism. incl. model of radio wave propagation.To give the theoretical base of model of a antennas. To teach to solve main problems of the theory mentioned above. To show the possible applications of the theory mentioned above.

Having finished the study of the subject a student has to be able:
1. to find the main parameters of antennas;
2. to find the matching circuits for the antennas;
3. to apply the maesurement equipment of antennas;
4. to check the correctness of results obtained by solution of practical exercises.

Basic equqtions of electromagnetic waeves. Types of antennas. Radiation process. Basic parameters of antennas - radiation characteristics, radiation pattern, gain, efficiency, directivity factor, operating frequency band, polarization, input impedance, effective area, effective height, equivalent noise temperature. Matching of feeder line to antenna. Antenna measurements. Feeder characteristics, impedance transformation, impedance diagram. Model of a propagation channel. Propagation in a free space. Propagation in an urban environment and in buildings. Tropospheric refraction and spreading. Refraction and reflection of waves in ionosphere. Satellite communications. Radio link. Propagation of microwaves and optical radiation in the troposphere. Effect of precipitation on propagation, fading, dispersion. Optical link. Fiber-optical lines - mono- and multimode fibers. Propagation of waves in guiding systems.

2016: CNS  

2015: CNS  

2014: CNS  

2013: CNS  

2012: CNS