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A parabolic antenna is an antenna that uses a parabolic reflector, a curved surface with the cross-sectional shape of a parabola, to direct the radio waves.The most common form is shaped like a dish and is popularly called a dish antenna or parabolic dish.n advantage of parabolic antennas is that most of the structure of the antenna (all of it except the feed antenna) is nonresonant, so it can function over a wide range of frequencies, that is a wide bandwidth.
The parabolic dish antenna is the form most frequently used in the radar engineering of installed antenna types of. Figure 1 illustrates the parabolic antenna. A dish antenna consists of one circular parabolic reflector and a point source situated in the focal point of this reflector.This point source is called âprimary feedâ or âfeedâ. The circular parabolic (paraboloid) reflector is constructed of metal, usually a frame covered by metal mesh at the inner side. dish antenna consists of one circular parabolic reflector and a point source situated in the focal point of this reflector. This point source is called âprimary feedâ or âfeedâ.