Definition
The component of a radar system that generates and sends out high-frequency radio energy in short, powerful pulses through the antenna. These pulses travel outward at the speed of light, strike objects in their path, and reflect a small portion of their energy back to the radar antenna for processing.
Plain English
The part of the radar that sends out the radio pulses. It produces the bursts of energy that go out, hit something, and bounce back so the radar can detect what's there.
Context Anchor
Seen in discussions of ground-based radar navigation and air traffic control radar equipment.
Derivation
From Latin trans- meaning 'across' and mittere meaning 'to send.' A transmitter literally 'sends across' -- in this case, sending radio energy out into the surrounding airspace.
Why Pilots Care
It is what allows ATC radar to see your aircraft so controllers can provide separation, vectors, and traffic advisories.
Grounding Statement
The radar transmitter is the sending side of the radar system; without it, there is no outgoing signal to reflect back from an aircraft.
Intuition Check
Do not think of the radar transmitter as the whole radar system. It sends the radar energy; other parts of the system receive and process the reflected signal.
Example Sentence 1
The radar transmitter sends out pulses of radio energy that bounce off aircraft and return to the antenna.
Example Sentence 2
Technicians adjust the radar transmitter power to maintain reliable coverage across the sector.