Overall receiver noise temperature expression if T1, T2… are amplifier 1, 2, and so on noise Temperature and G1, G2, and so on are their gain respectively is_____(a) T = \(T_1+\frac{T_2}{G_1}+\frac{T_3}{G_1 G_2}+⋯ \)(b) T = T1+T2 (1-G1)+T3(1-G1G2)+⋯(c) T = \(T_1+\frac{T_2}{(1-G_1)}+\frac{T_3}{(1-G_1 G_2)}+⋯\)(d) T = T1+T2 (G1)+T3(G1G2)+⋯The question was posed to me in an interview for internship.I need to ask this question from Antenna Noise Temperature in division Antenna Parameters – II of Antennas

Overall receiver noise temperature expression if T1, T2… are amplifi

1.	Overall receiver noise temperature expression if T1, T2… are amplifier 1, 2, and so on noise Temperature and G1, G2, and so on are their gain respectively is_____(a) T = \(T_1+\frac{T_2}{G_1}+\frac{T_3}{G_1 G_2}+⋯ \)(b) T = T1+T2 (1-G1)+T3(1-G1G2)+⋯(c) T = \(T_1+\frac{T_2}{(1-G_1)}+\frac{T_3}{(1-G_1 G_2)}+⋯\)(d) T = T1+T2 (G1)+T3(G1G2)+⋯The question was posed to me in an interview for internship.I need to ask this question from Antenna Noise Temperature in division Antenna Parameters – II of Antennas
Answer» Right OPTION is (a) T = \(T_1+\frac{T_2}{G_1}+\frac{T_3}{G_1 G_2}+⋯ \) To elaborate: Overall receiver noise TEMPERATURE EXPRESSION is GIVEN by T = \(T_1+\frac{T_2}{G_1}+\frac{T_3}{G_1 G_2}+⋯ \) System Temperature is one of the important factors to determine the ANTENNA sensitivity and SNR.

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