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For a feeder length of 0.5λ, which among the following would be the reflector length?

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For a feeder length of 0.5λ, which among the following would be the reflector length?

(a) 0.525λ

(b) 0.425λ

(c) 0.23λ

(d) 0.35λ

This question was posed to me in an online interview.

The query is from Construction of Yagi topic in chapter Folded Dipole & Yagi – Uda Antenna of Antennas

1 Answer

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Correct answer is (a) 0.525λ

Explanation: The reflector length is approximately 5% greater than the driven element length.

So, l = 0.525λ is correct as it is the only option which is greater than 0.5λ.

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