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Low Noise Amplifier Design

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Excerpt from Research Paper:

Low Noise Amplifier Design

download word file, 12 pages (89KB)

Document Type: Research Paper
General Topic: Engineering
School Level: Master
Sources: 15
Views: 123
Words: 3264
Pages: 12
Paper #: 85458328

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aL & bL = incident & reflected wave from the LNA output



in (input reflection coefficient ) = S11 +[ ( S21 . S12 . L) / (1-S22 . L)]

out (output reflection coefficient ) = = S22 +[ ( S12 . S21 . S) / (1-S11 . S)]

Where S = Source reflection coefficient

And L = Load reflection coefficient



The gains defined before can be expressed as follows

Transducer power gain :

[( 1 - | S | ^2) / | 1 S11 . S | ^2] . | S21|^2 . [(1 - | L|^2) / | 1 - out L | ^2 ]

Operating power gain :

[ 1 / (1 | in | ^2)] . | S21|^2 . [(1 - | L|^2) / | 1 S22. L | ^2 ]

Available power gain :

[( 1 - | S | ^2) / | 1 S11 . S | ^2] . | S21|^2 . [ 1 / (1 - | out | ^2 ]



Maximum unilateral transducer power gain:

[ 1 / | 1

or

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