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10 July 2022. ( 2022-07-10) The X Factor is the Greek version of The X Factor, a show originating in the United Kingdom. It is a television music talent show contested by aspiring pop singers drawn from public auditions. Auditions are held in Greece in the cities of Athens and Thessaloniki, as well as in Cyprus in the city of Nicosia.
In electromagnetics, the antenna factor ( AF, units: m −1, reciprocal meter) is defined as the ratio of the electric field E (units: V/m or μV/m) to the voltage V (units: V or μV) induced across the terminals of an antenna : If all quantities are expressed logarithmically in decibels instead of SI units, the above equation becomes.
Since this factor is not related to the radio wave path but comes from the receiving antenna, the term "free-space path loss" is a little misleading. Directivity of receiving antenna- while the above formulas are correct, the presence of Directivities Dt and Dr builds the wrong intuition in the FSPL Friis transmission formula. The formula seems ...
Dipole antenna used by the radar altimeter in an airplane. Animated diagram of a half-wave dipole antenna receiving a radio wave. The antenna consists of two metal rods connected to a receiver R. The electric field ( E, green arrows) of the incoming wave pushes the electrons in the rods back and forth, charging the ends alternately positive ...
The X Factor also known as The X Factor USA, is an American reality television music competition show created by Simon Cowell and produced by FremantleMedia North America and SYCOtv, a partnership between Cowell and Sony Music Entertainment, which aired on Fox. [2] Based on the original UK show, and an addition to The X Factor franchise, the ...
For such an antenna, the near field is the region within a radius r ≪ λ, while the far-field is the region for which r ≫ 2 λ. The transition zone is the region between r = λ and r = 2 λ . The length of the antenna, D, is not important, and the approximation is the same for all shorter antennas (sometimes idealized as so-called point ...
In electromagnetics, an antenna's gain is a key performance parameter which combines the antenna 's directivity and radiation efficiency. The term power gain has been deprecated by IEEE. [ 1] In a transmitting antenna, the gain describes how well the antenna converts input power into radio waves headed in a specified direction. In a receiving ...
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. The main advantage of a parabolic antenna is that it has high directivity.