2.4. A receiver is made up of three cascaded stages each with a gain of 10 dB and each with a noise figure of 3 dB. a. Calculate the overall noise figure. b. Calculate the overall noise figure if only the input stage degrades so that its noise figure becomes 6 dB. c. Calculate the overall noise figure if only the output stage degrades so that its noise figure becomes 6 dB. Discuss the reason that your answer is smaller than in Part (b).

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2.4. A receiver is made up of three cascaded stages each with a gain
of 10 dB and each with a noise figure of 3 dB.
a. Calculate the overall noise figure.
b. Calculate the overall noise figure if only the input stage
degrades so that its noise figure becomes 6 dB.
c.
Calculate the overall noise figure if only the output stage
degrades so that its noise figure becomes 6 dB. Discuss the
reason that your answer is smaller than in Part (b).
Transcribed Image Text:2.4. A receiver is made up of three cascaded stages each with a gain of 10 dB and each with a noise figure of 3 dB. a. Calculate the overall noise figure. b. Calculate the overall noise figure if only the input stage degrades so that its noise figure becomes 6 dB. c. Calculate the overall noise figure if only the output stage degrades so that its noise figure becomes 6 dB. Discuss the reason that your answer is smaller than in Part (b).
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