Model mixer using intermodulation table (IMT)
RF Blockset / Circuit Envelope / Elements
Use the IMT Mixer to perform frequency translation defined in an intermodulation table (see [1], [2], [3], and [4]) for a single tone carrier mixed with a local oscillator (LO) signal. The block includes nonlinear amplification, device and phase noise, and mixer spur visualization. For a single tone carrier Fcar nonlinearly modulated with an LO signal of frequency FLO, the mixer output intermodulation products occur at frequencies:
where:
Fcar – input RF signal carrier frequency
FLO – local oscillator frequency
M and N are nonnegative integers (0,1,…, order of nonlinearity)
For a downconverter, the desired output tone is , and for an upconverter it is . All other combinations of M and N represent the spurious intermodulation products.
[1] https://www.mathworks.com/help/rf/examples/visualizing-mixer-spurs.html
[2] https://www.microwavejournal.com/articles/3430-the-use-of-intermodulation-tables-for-mixer-simulations
[3] https://www.electronics-notes.com/articles/radio/rf-mixer/rf-mixing-basics.php
[4] https://www.mathworks.com/help/rf/examples/rf-data-objects.html