Electronics and Communication Engineering - Exam Questions Papers - Discussion

11. 

Radiation resistance of an antenna is 54 Ω and loss resistance is 6 Ω. If antenna has power gain of 10, then directivity is:

[A]. 9
[B]. 11.11
[C]. data not sufficient
[D]. 10

Answer: Option B

Explanation:

Efficiency of antenna

Power gain = 10

Thus directivity .


Adeeb Ali said: (Apr 3, 2017)  
What is directivity?

Siri Chandana said: (Sep 27, 2020)  
Directivity = power gain/efficiency.

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