Non-Linearity in RF System - Part I — Lesson 3

This lesson covers the concept of nonlinearity in RF system design, focusing on the RF transceiver design. It explains the importance of third-order nonlinearity due to its proximity to the desired frequency. The lesson also discusses the derivation of equations for IAP3, a point where first and third-order curves intersect. It further explains how to measure IAP3 using a spectrum analyzer or network analyzer. The lesson also introduces the concept of dynamic range and sensitivity in RF systems.

Video Highlights

00:25 - How to find Third order intercept point (IIP3 and OIP3)
06:10 - Explanation of how to calculate the IIP3 of a system using an example
10:55 - Cascaded nonlinearity in RF systems and how it affects the overall system performance
25:45 - Sensitivity
34:55 - Calculate the dynamic range of a receiver
37:20 - Calculate the spurious free dynamic range

Key Takeaways

- Third-order nonlinearity is significant in RF system design due to its proximity to the desired frequency.
- IAP3 is a point where first and third-order curves intersect, and it can be measured using a spectrum analyzer or network analyzer.
- The dynamic range in RF systems is defined by the maximum input level a receiver can tolerate and the minimum input level it can detect.
- Sensitivity in RF systems refers to the minimum signal level that a receiver can detect with acceptable quality.
- The noise figure and nonlinearity define the lower and upper limits of the dynamic range, respectively.