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Question

A parabolic dish antenna is a ____________ antenna.

A
Omnidirectional
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B
Bidirectional
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C
Undirectional
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D
Horn
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Solution

The correct option is C Undirectional

A parabolic dish antenna is a Undirectional antenna.

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. ... They are also used in radio telescopes.

A high-gain antenna (HGA) is a directional antenna with a focused, narrow radiowave beam width. This narrow beam width allows more precise targeting of the radio signals. ... For long and medium wavelength frequencies, tower arrays are used in most cases as directional antennas.

Dipole antennas are said to have a gain of 2.14 dBi, which is in comparison to an isotropic antenna. The higher the gain of the antennas, the smaller the vertical beamwidth is. Imagine the radiation pattern of an isotropic antenna as a balloon, which extends from the antenna equally in all directions.

A satellite dish is a dish-shaped type of parabolic antenna designed to receive or transmit information by radio waves to or from a communication satellite. The term most commonly means a dish used by consumers to receive direct-broadcast satellite television from a direct broadcast satellite in geostationary orbit.


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