SBOU318 July   2024 TRF1108

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  6. 2Hardware
    1. 2.1 General Usage Information
  7. 3Implementation Results
    1. 3.1 Test Setup Diagrams
      1. 3.1.1 S-Parameter Test Setup
      2. 3.1.2 Noise Figure Test Setup
      3. 3.1.3 Two-Tone OIP3 Test Setup
  8. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layers
      1. 4.2.1 Stack-Up and Material
    3. 4.3 TRF1108 EVM Bill of Material
  9. 5Additional Information
    1. 5.1 Trademarks
  10. 6Related Documentation

3.1.2 Noise Figure Test Setup

TRF1108EVM Noise Figure Test SetupFigure 3-3 Noise Figure Test Setup

Use the following guidelines for Noise Figure (NF) measurement:

  1. As Figure 4-3 shows, the traditional Y-factor method can be used for the NF measurement using a Noise Diode and a spectrum analyzer (or a Noise Figure Analyzer).
  2. While doing the measurement, take into account any RF cable losses to the EVM board. Any external input attenuator added for matching results in proportional NF degradation and must be calibrated out in the measurement.
  3. Also, onboard losses of the input traces at the device input pin must be factored into the NF measurement.
  4. If the loss after the device output is significant, then note to factor the output loss into the NF measurement. Use the Friis equation to calculate the Noise Figure of the device from the total measured NF.