Definition
An antenna in which the transmission line connects to the antenna at a point of maximum current flow, typically at the center of a half-wave element. This feed point matches a low impedance and produces an even, balanced radiation pattern from the antenna.
Plain English
An antenna where the wire from the radio attaches at the spot where electrical current is strongest, usually right in the middle of the antenna. Connecting it there gives the cleanest, most efficient signal.
Context Anchor
Seen in aircraft radio and antenna system discussions, especially when describing how an antenna is connected to a transmitter or receiver.
Derivation
Current refers to the flow of electrons in the antenna, and fed means the point where the radio's signal is delivered to the antenna. So a current-fed antenna is one fed at the location where current is highest, as opposed to a voltage-fed antenna, which is fed where voltage is highest.
Why Pilots Care
Correct feed type ensures reliable VHF and HF communication range and prevents transmitter damage from mismatch.
Intuition Check
Current does not mean present or up-to-date here. It means electrical flow in the antenna.
Example Sentence 1
The technician explained that the VHF communication antenna on the aircraft is a current-fed antenna, with the coaxial cable attached at the center of the element.
Example Sentence 2
After the check, the current-fed design showed low SWR across the assigned frequencies.