Electronics and Communication Engineering - Exam Questions Papers - Discussion

3. 

A short grounded vertical antenna has a length L which is 0.05λ at frequency f. If its radiation resistance at f is R ohms, then its radiation resistance at a frequency 2f will be

[A]. R/2Ω
[B].
[C]. 2RΩ
[D]. 4RΩ

Answer: Option D

Explanation:

Rr = 80p2

Rrf2.


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