Astrophysics (index)

Antenna Temperature

(Antenna Noise Temperature)
(parameter in determining noise introduced by an antenna)

Antenna Temperature (or Antenna Noise Temperature) is not the physical Temperature of the antenna, but a parameter determining the noise affecting received signal via the antenna. It is a specific instance of Noise Temperature, a measure the noise of a circuit by citing the temperature that would produce equivalent Thermal Noise, a type of noise introduced into electric circuits by the temperature of the components. Antenna Noise Temperature is specific to both Frequency and direction and results from:

  • The antenna itself
  • Galactic radiation
  • Earth heating
  • The Sun
  • Electrical devices

The noise temperature relates to the power of the noise as follows:

T = P / kBB

(electronics,measure)
http://en.wikipedia.org/wiki/Antenna_noise_temperature
http://www.antenna-theory.com/basics/temperature.php

Referenced by:
Thermal Noise

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