Question

What is the driven length (in feet) for a three element Yagi-Uda array, operating at a frequency 500MHz?

(a) 0.95

(b) 0.2

(c) 1

(d) 2

This question was posed to me by my college director while I was bunking the class.

I'm obligated to ask this question of Construction of Yagi topic in chapter Folded Dipole & Yagi – Uda Antenna of Antennas

Answer 1

The correct choice is (a) 0.95

Easiest explanation: For a 3 element Yagi-Uda array,

Driven element length (feet) = 475/f (MHz) = 475/500 = 0.95 feet.