RF Intermodulation Calculator

This page provides information about an RF Intermodulation calculator, including the formula/equation it uses. It’s also known as an RF IMD calculator. This tool calculates Intermodulation (IMD) products based on two fundamental frequencies.

IMD products can be determined for more than two frequency inputs as well. The calculator focuses on 2nd and 3rd order IMD products because these are closest to the fundamental input frequencies and typically have higher power levels.

EXAMPLE of RF Intermodulation calculator:

• INPUTS: F1 = 20 MHz, F2 = 21 MHz
• OUTPUT:
  • 2nd order IMD frequencies = 41 MHz, 1 MHz, 40 MHz, 42 MHz
  • 3rd order IMD frequencies = 61 MHz, 19 MHz, 62 MHz, 22 MHz

RF Intermodulation Calculator Formula | RF IMD Calculator Equation

Intermodulation products arise from the sum and difference of the input frequencies, as well as integer and non-integer multiples of those frequencies.

The following equation/formula is used for the RF Intermodulation (IMD) calculator: