Electronics and Communication Engineering - Exam Questions Papers - Discussion

Discussion Forum : Exam Questions Papers - Exam Paper 7 (Q.No. 3)
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
R/2Ω
2RΩ
4RΩ
Answer: Option
Explanation:

Rr = 80p2

Rrf2.

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