horn radiator

horn radiator

[′hȯrn ′rād·ē‚ād·ər] (electromagnetism) horn antenna

horn

i. An antenna shaped like a horn. Radar waves are radiated directly into space without benefit of a reflector. A horn is usually designed as an extension of a waveguide whose sides flare from the original waveguide size to a larger aperture size. Also called a horn radiator.
ii. A device for making a warning noise, as used, for example, in a landing-gear warning system.
iii. A short lever attached to a control surface, to which the control cable, other operating line, rod, or compensating weight or aerodynamic surface is attached, as in a rudder horn, elevator horn, or horn balance.