Index on Radar Systems
Round, covered antennas
When the cover of these antennas is flattened in the main beam direction then the cover forms with the reflector a special kind of the Cassegrain antenna. If the cover looks like a cone then the cover is simply the protection against the weather..
These types of antennas are used with weapon control radar. For this reason, additional sensors such as lasers, infrared and high-resolution television cameras are often installed next to the antenna.