paraboloidal reflector

paraboloidal reflector

[pə¦rab·ə¦lȯid·əl ri′flek·tər] (electromagnetism) An antenna having a concave surface which is a paraboloid of revolution; it concentrates radiation from a source at its focal point into a beam. Also known as paraboloidal antenna. (optics) A concave mirror which is a paraboloid of revolution and produces parallel rays of light from a source located at the focus of the parabola. Also known as parabolic reflector.