Magnitude of intermodulation distortion products?

1. How do you calculate intermodulation distortion?
2. How is intermodulation measured?
3. What is IMD in RF?
4. What is an intermodulation product?

How do you calculate intermodulation distortion?

Analysis of several stimulus tones can become very complex so it is a common practice to limit the analysis to two tones. The frequencies of the two-tone intermodulation products can be computed by the equation: M f1 ±N f2, where M, N = 0, 1, 2, 3, ..... The order of the distortion product is given by the sum of M + N.

How is intermodulation measured?

Intermodulation is traditionally measured using two RF generators, each delivering a tone. The tones are equal in power but slightly offset in frequency. They are combined into a single path and applied to the device under test (DUT).

What is IMD in RF?

Intermodulation Distortion (IMD) occurs when two or more signals are used in a non-linear system. The spectrum at the output of the non-linear device will not only consist of the original signals but will also contain the sum and difference of the input signals along with their harmonics.

What is an intermodulation product?

The intermodulation products are spurious frequency components generated when two or more signals pass through a non-linear device. The intermodulation products can be of different orders, such as second-order or third-order, depending on the non-linearity, number, and frequency of signals present in the system.