Definition
A directional antenna with a concave, bowl-shaped reflector that focuses incoming radio waves onto a small receiving element at its focal point, or directs transmitted signals into a narrow beam. Dish antennas are used at microwave frequencies for satellite communication, weather radar, and other high-frequency applications where a tightly focused signal is needed.
Plain English
A bowl-shaped antenna that gathers radio signals into one spot, much like a bowl-shaped mirror gathers light. The curved shape lets it send or receive signals along a narrow path rather than spraying them in all directions.
Context Anchor
Seen in discussions of aircraft weather radar, satellite communication equipment, and ground-based radar or communication systems.
Derivation
Named for its visual resemblance to a dish or shallow bowl. The shape is what does the work — the curve focuses signals the same way a dish would focus anything dropped into its center.
Why Pilots Care
Aircraft weather radar and satellite communication systems rely on dish-style antennas. Knowing how they work helps explain why these systems must be aimed accurately and why obstructions or misalignment degrade performance.
Analogy
A dish antenna works somewhat like the reflector behind a flashlight bulb: the curved surface helps gather and aim energy in one direction.
Intuition Check
“Dish” does not mean a kitchen item here. It means the antenna has a curved, bowl-like shape that helps focus radio energy.
Example Sentence 1
The dish antenna mounted in the aircraft's nose cone sweeps back and forth to scan for weather ahead.
Example Sentence 2
Ice forming on the dish antenna can reduce signal strength during flight.