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Solved Problems-3

Problem-3
Find the effective area of the following antennas:
  1. Half-wave dipole antenna operating at 500 MHz
  2. Hertzian dipole antenna operating at 100 MHz
Solution
The effective area of an antenna is given as,
 
Description: Description: 29896.png
 
where D is the directivity of the antenna.

(a) For Hertzian dipole antenna, from Problem 1, D = 1.5
 
For a frequency of 100 MHz, the wavelength is,
 
Description: Description: 29885.png
 
Hence, the effective area is,
 
Description: Description: 29878.png
 
(b) For half-wave dipole antenna, from Problem 1, D = 1.64
 
For a frequency of 500 MHz, the wavelength is,
 
Description: Description: 29869.png
 
Hence, the effective area is,
 
Description: Description: 29861.png
 





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