Question

Find the aperture ratio of the paraboloid with aperture diameter 1m at 1.5GHz frequency?

(a) 5

(b) 0.2

(c) 1.5

(d) 7.5

The question was asked by my school teacher while I was bunking the class.

Question is taken from Parabolic Reflector Antenna in chapter Reflector Antenna of Antennas

Answer 1

The correct choice is (a) 5

Easy explanation: Aperture ratio \(= \frac{d}{λ}\)

\(λ=\frac{c}{f}=\frac{3×10^8}{1.5×10^9}=0.2m\)

Aperture ratio\( = \frac{1}{0.2}=5.\)