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This question belongs to Electronics And Communications Engineering Communication Systems

Communication Systems

?

An antenna pointing in a certain direction has a noise temperature of 50 K. The ambient temperature is 290 K. The antenna is connected to a pre-amplifier that has a noise figure of 2 dB and an available gain of 40 dB over an effective bandwidth of 12 MHz. The effective input noise temperature T_e for the amplifier and the noise power P_a0 at the output of the preamplifier, respectively, are

A) T_e = 169.36 K and P_a0 = 3.37 × 10^-10 W B) T_e = 170.8 K and P_a0 = 4.56 × 10^-10 W C) T_e = 182.5 K and P_a0 = 3.85 × 10^-10 W D) T_e = 160.62 K and P_a0 = 4.6 × 10^-10 W

Answer & Solution

Correct Answer: Option A

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