Sep 28, 2017 term paper 2

A SOURCE WITH EQUIVALENT NOISE TEMPERATURE T S = 1000 K IS FOLLOWED BY A CASCADE OF THREE…

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A source with equivalent noise temperature Ts = 1000 K is followed by a cascade of three amplifiers having the specifications shown in Table A.1. Assume a bandwidth of 50 kHz.

a. Find the noise figure of the cascade.

b. Suppose amplifiers 1 and 2 are interchanged. Find the noise figure of the cascade.

c. Find the noise temperature of the systems of parts (a) and (b).

d. Assuming the configuration of part (a), find the required input signal power to give an output SNR of 40 dB. Perform the same calculation for the system of part (b).


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