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Find the effective noise temperature if noise figure is 3 at room temperature (290K)?

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Find the effective noise temperature if noise figure is 3 at room temperature (290K)?

(a) 290K

(b) 580K

(c) 289K

(d) 195K

This question was addressed to me in quiz.

My question is based upon Antenna Noise Temperature topic in portion Antenna Parameters – II of Antennas

1 Answer

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Best answer
Right answer is (b) 580K

To explain I would say: Room temperature To=290K

Noise figure F=1+\(\frac{T_e}{T_o}\)

 Te=To(F-1)=290(3-1)=580K.

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