How do the lengths of a three-element Yagi reflector and director compare to that of the driven element?
The reflector is longer, and the director is shorter✓Correct answer
The reflector is shorter, and the director is longer
They are all the same length
Relative length depends on the frequency of operation
Explanation
A parasitic element longer than resonance is inductive, and the phase of the current induced in it makes it reinforce radiation away from itself, acting as a reflector; a shorter, capacitive element reinforces radiation toward itself, acting as a director.