Question

In comparison to waveguide a horn produces a

Answer 1

horn produces a uniform plane wavefornt with a large aperture in comparison to waveguide. as this aperture is large, directivity is high.

Answer 2

Answer:

horn antenna or microwave horn is an antenna that consists of a flaring metal waveguide shaped like a horn to direct radio waves in a beam. Horns are widely used as antennas at UHF and microwave frequencies, above 300 MHz. ... The modern horn antenna was invented independently in 1938 by Wilmer Barrow and G. C.