Question

The Axial ratio of the helical antenna with 3 turns is _____

(a) 1.11

(b) 0.89

(c) 6

(d) 0.98

The question was posed to me by my school principal while I was bunking the class.

I need to ask this question from Frequency Independent Antenna topic in portion Frequency Independent Antenna of Antennas

Answer 1

Right answer is (a) 1.11

To explain I would say: The axial ratio of helical antenna is given by \(AR = \frac{2N+1}{2N} \)

\(AR = \frac{2N+1}{2N} = \frac{7}{6} = 1.11\)