(a) For hest performance, which unit should he driven by the antenna? (b) What is the noise figure of the best cascade?

A First Course in Probability (10th Edition)
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Chapter1: Combinatorial Analysis
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Two amplifier have noise figures of Fo1 = 1.6(unit 1) and F02
= 1.4 (unit 2). They
%3D
have respective available power gains. of G,1 = 12 and G,2 = 8. The two amplifiers
are to be used in a cascade driven from an antenna to obtain an overall available
power gain of (8) (12) = 96.
(a) For best performance, which unit should be driven by the antenna?
(b) What is the noise figure of the best cascade?
Transcribed Image Text:Two amplifier have noise figures of Fo1 = 1.6(unit 1) and F02 = 1.4 (unit 2). They %3D have respective available power gains. of G,1 = 12 and G,2 = 8. The two amplifiers are to be used in a cascade driven from an antenna to obtain an overall available power gain of (8) (12) = 96. (a) For best performance, which unit should be driven by the antenna? (b) What is the noise figure of the best cascade?
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