A communication system uses low noise front-end receiver as shown in the Figure below. The antennahas an effective noise temperature T = 50 K. The receiver has noise bandwidth, B= 120 MHz, operateat room temperature T,=290K and is driving a load of 600 2.AntennaReceiverTatAmplifier 2,F2= 3BG2=6 BAmplifier 3Preamplifier,T= 60 K,G1=15 dB(S/N),F3= 6BSiG3= 0(i) Calculate the overall effective noise temperature of the receiver.(ii) Evaluate the output noise voltage and power.(iii) Evaluate the S/N at the input and output of the receiver for input power SiuW.0.05%3D(iv) Calculate the minimum input power requires to support a communication with output SNR greaterthan 20 dB.(v) Explain why it is important to have a low noise figure in the first stage of an amplifier than in otherstages.

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