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Practical Noise-Figure Measurement and
Analysis for Low-Noise Amplifier Designs
Application Note 1354
Table of contents Introduction
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Understanding and accurately measuring noise figure
(NF) in low-noise elements has become particularly
The design process . . . . . . . . . . . . . . . . . . . . . . . . .3 important to the development of next-generation
Software modeling . . . . . . . . . . . . . . . . . . . . . . . .3 communications systems. This application note
Functional requirements . . . . . . . . . . . . . . . . . . . .3 examines the process of making practical noise-
Selecting a device . . . . . . . . . . . . . . . . . . . . . . . . .4 figure (NF) measurements of low-noise amplifiers
Raw device modeling . . . . . . . . . . . . . . . . . . . . . .4 (LNAs)