I. Introduction
For many years, the transmission and reception of information using aperture antennas have been an important area that needs to be constantly developed. The horn antenna is probably the most popular type of aperture antenna. Horn antenna is widely used for transmission and reception of electromagnetic waves in areas such as microwave communication, electromagnetic compatibility (EMC) testing. Also, they have found their application as power elements for radio astronomy, satellite tracking, and communication antennas [1].