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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.
If you're in real need of a better Wi-Fi signal then you can actually make your own little parabolic dish to ''catch'' some better reception. This is basically a small version of a big radio or satellite dish. You can use a metal bowl or cut open a soda can to make a receiver dish.