Question

Find the width of aperture of the E-plane horn operating at frequency 800MHz with the slant length 5cm?

(a) 1.936 cm

(b) 19.36 cm

(c) 0.194 cm

(d) 1.936 m

I have been asked this question in homework.

I want to ask this question from Design in chapter Horn Antenna of Antennas

Answer 1

Correct answer is (b) 19.36 cm

The explanation: Aperture width \( = \sqrt{2λL}=\sqrt{\frac{2c}{f} L}=\sqrt{\frac{2×3×10^{10}}{800×10^6}×5}=19.36 cm\)