Horn antennas come in many shapes and sizes, each tailored for specific applications like telecommunications, radar, and satellite communications. Their ability to work across a wide frequency range makes them quite irreplaceable.

Research into horn antennas never stops. Advances in materials, simulations, and fabrication techniques like 3D printing make them even more popular among researchers.
 
It is quite easy to find a horn antenna around you: look inside anechoic chamber or at rooftop dishes.