Amplifiers

The Y Factor Technique for Noise Figure Measurements

This application note describes in detail the steps required to make a noise figure measurement on a spectrum analyzer using the “Y Factor” technique. Background equations are presented for each step of the calculation. In addition, guidelines are provided to ensure a repeatable measurement. Measurement uncertainty is then reviewed, including contributions due to the noise source, analyzer, and the DUT itself. Finally, a software utility is presented that automates the noise figure calculation using four measurements from a spectrum analyzer. The utility checks the measurement guidelines and highlights potential problem areas. It then calculates the noise figure for the DUT along with the measurement uncertainty.

Name
Type
Version
Date
Size
The Y Factor Technique for Noise Figure Measurements | 1MA178
Type
Application Note
Version
4e
Date
12-Feb-2019
Size
803 kB
1MA178_NF Uncertainty Calc_v322.exe
Type
Application Note File
Version
3.30
Date
12-Feb-2019
Size
270 kB
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