An attenuator with loss L 1 is followed by an amplifier with noise figure F and gain G a 1 L (a) Find the noise figure of the cascade at tempera true T 0 (b) Consider the cascade of two identical attenuator amplifier stages as in part (a) Determine the noise figure of the cascade at temperature T 0...

a The noise figure of the cascade at temperature T0 is equal to F 10 log1 L b The nois ...

An attenuator with loss L 1 is followed by an amplifier with noise figure F and gain

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An attenuator with loss L» 1 is followed by an amplifier with noise figure F and gain G_a = 1 /L.

(a) Find the noise figure of the cascade at tempera true T₀.

(b) Consider the cascade of two identical attenuator- amplifier stages as in part (a). Determine the noise figure of the cascade at temperature T₀.

(c) Generalize these results to N identical attenuators and amplifiers at temperature T₀. How many decibels does the noise figure increase as a result of doubling the number of attenuators and amplifiers?

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Principles of Communications Systems, Modulation and Noise

ISBN: 978-8126556793

7th edition

Authors: Rodger E. Ziemer, William H. Tranter

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Question Posted: Feb 13, 2020 11:56 AM

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An attenuator with loss L 1 is followed by an amplifier with noise figure F and gain

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Principles of Communications Systems, Modulation and Noise

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