Question

Effective noise temperature Te in terms of noise figure is ____

(a) Te=To (F-1)

(b) Te=To/(F-1)

(c) Te=To/(F+1)

(d) Te=To (F+1)

This question was addressed to me during an interview.

I need to ask this question from Antenna Noise Temperature in portion Antenna Parameters – II of Antennas

Answer 1

The correct answer is (a) Te=To (F-1)

To explain I would say: The relation between noise figure and effective noise temperature is given by F=1+\(\frac{T_e}{T_o}\)

⇨ F-1=\(\frac{T_e}{T_o}\)

⇨ Te=To (F-1)