Indian Institute of Technology Gandhinagar
Department of Electrical Engineering
EE 401 Communications Laboratory B.Tech: Electrical, Sem.: VII (2012-13)
EXPERIMENT 2 : ANTENNA
Objective: • To study different types of antennas:
o λ/2 (half wavelength) Dipole Antenna o Yagi-UDA 5-element Dipole Antenna o Yagi-UDA 7-element Dipole Antenna
• To measure the different parameters / characteristics of the antennas:
o Radiation Pattern o Beamwidth o Front-to-Back ratio o Gain o Polarisation o Radiation strength variation with distance. o Stub Matching o SWR Measurement
Indian Institute of Technology Gandhinagar Department of Electrical Engineering
EE 401 Communications Laboratory B.Tech: Electrical, Sem.: VII (2012-13)
EXPERIMENT 2 : ANTENNA
Antenna Trainer ST2261
1. Technical Specifications 3 2. Trainer Description 4 3. Basic Antenna Concept 9 4. Important Characteristics of Antenna 15 5. Experiment 1 : Arranging the Trainer and performing Functional Checks 20 6. Experiment 2 : Study of Simple Dipole (λ/2) Antenna 24 7. Experiment 3 : To perform the Polarisation Test 26 8. Experiment 4 : Study of the variation in the Radiation Strength with the Distance 27
from the Antenna
9. Experiment 5: Use of the Matching Stub 28 10. Experiment 6 : SWR Measurement 30 11. Experiment 7 : Study of Yagi-UDA 5 element Simple Dipole 31 12. Experiment 8 : Study of Yagi-UDA 7 element Simple Dipole 32 μA to dBμA Conversion Chart 34 Polar Graph 35 2
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