Oblong shaped DSS Dish (not 18.5" x 24"). This dish points to two satellites at one time. This type of dish is needed for High Definition Dish or DIRECTV, and will also be necessary to receive Local-to-Local signals in many areas.
Most frequently found satellite TV antenna, named for the shape of the dish described mathematically as a parabola. The parabolic shape focuses the weak microwave signal hitting the surface of the dish into a single focal point in front of the dish where the feedhorn is usually located.
A solar energy conversion device that has a bowl shaped dish covered with a highly reflective surface that tracks the sun and concentrates sunlight on a fixed absorber, thereby achieving high temperatures, for process heating or to operate a heat (Stirling) engine to produce power or electricity.