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A half wave folded dipole of 3 wires has the impedance _____Ω.

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A half wave folded dipole of 3 wires has the impedance _____Ω.

(a) 675

(b) 657

(c) 219

(d) 292

The question was asked in a job interview.

I'd like to ask this question from Folded Dipole Antenna in section Folded Dipole & Yagi – Uda Antenna of Antennas

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Best answer
Right option is (b) 657

Explanation: For a half wave folded dipole of 3 wires the impedance = n^2×73=9×73=657

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