About the Subject :
An antenna (plural antennae or antennas), or aerial, is an electrical device which converts electric power into radio waves, and vice versa.[1] It is usually used with a radio transmitter or radio receiver. In transmission, a radio transmitter supplies an electric current oscillating at radio frequency (i.e. a high frequency alternating current (AC)) to the antenna's terminals, and the antenna radiates the energy from the current as electromagnetic waves (radio waves). In reception, an antenna intercepts some of the power of an electromagnetic wave in order to produce a tiny voltage at its terminals, that is applied to a receiver to be amplified
Topics to be covered in this Seminar :
Antenna parameters –Matching – Baluns,
Polarization mismatch, Antenna noise temperature, Radiation from oscillating
dipole, Half wave dipole. Folded dipole, Yagi array- Radiation from
rectangular apertures, Uniform and Tapered aperture, Horn antenna , Reflector
antenna , Aperture blockage , Feeding structures , Slot antennas ,Microstrip
antennas – Radiation mechanism – Application ,Numerical tool for antenna
analysis- N element linear array, Pattern multiplication, Broadside and
End fire array – Concept of Phased arrays, Adaptive array, Basic principle of
antenna Synthesis-Binomial array-Principle of frequency independent antennas
-Modern antennas, Electronic band gap structure and applications, Antenna
Measurements-Test Ranges, Measurement of Gain, Radiation pattern, Polarization,
VSWR- Modes of propagation , Structure of atmosphere – Virtual height,
critical frequency , Maximum usable frequency – Skip distance, Fading , Multi
hop propagation.
Time to be planned :
1 or 2 days
Kind of program :
3D based Seminar and Guest
Lecture for the Students
Reason for the program :
Kalam Scientist Team aiming to
build young generation Scientist
Sample Clips for reference :
Sky wave Propagation
Microstrip Antennas