Electronics and Communication Engineering - Microwave Communication - Discussion

20. 

The width of a radio beam from a 1 m diameter parabolic antenna at 1 GHz is about

[A]. 100°
[B]. 50°
[C].
[D].

Answer: Option B

Explanation:

Beam width between nulls of a parabolic antenna . Therefore 50° is the nearest value.


Joydeb said: (Jan 13, 2019)  
According to me, (70*3*10^8)/(1e9*1) = 21 °

Pavankumar said: (Jul 16, 2019)  
The beam width of parabolic antenna = 2(70λ)/D.
SO, 21*2=42 approx to 50°

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