A horn antenna, sometimes referred to as a microwave horn, is a type of antenna that is commonly used in microwave communications and radar systems. However, there are a few alternative terms that can be used to describe this type of antenna. These include waveguide horns, conical horns, pyramidal horns, and corrugated horns. Waveguide horns are similar to horn antennas but are designed for specific frequencies. Conical horns are tapered from a wider opening to a narrower one and are used in satellite communications. Pyramidal horns have a pyramidal shape and are often used for radar systems. Finally, corrugated horns have a corrugated shape and are often used for high-power applications.