Electronics and Communication Engineering - Microwave Communication - Discussion


The radiation resistance of a circular loop of one turn is 0.01 ohm. For 5 turn loop the radiation resistance is

[A]. 0.002 Ω
[B]. 0.01 Ω
[C]. 0.05 Ω
[D]. 0.25 Ω

Answer: Option D


No answer description available for this question.

Nimai said: (May 25, 2016)  
If the loop antenna has N turns, then the radiation resistance increases with a factor of the square of N.

Xyz said: (May 2, 2017)  
R is proportional to N square,
R1/R2 = N1^2/N2^2.

0.01/R2 = I^2/5^2.
R2 = 0.25 ohm.

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