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Nonlinear Modeling

Nonlinear elements, nonlinear behavior, intermodulation distortion, IP2/IP3, interference

Use these blocks to specify the nonlinear behavior of amplifiers and mixers. Such behavior includes IP2/IP3, intermodulation distortion and 1 dB compression. You can also simulate frequency-dependent mismatches between components.


Amplifier Model amplifier in RF systems
Resistor Model resistor for circuit envelope analysis
Phase Shift Model phase shift in RF systems
S-Parameters Model S-parameter network
Mixer Model mixer in RF systems
Signal Combiner Compute sum of RF signals
Circulator Model ideal frequency-independent circulators with S-parameters
Coupler Model ideal frequency-independent couplers with S-parameters
Divider Model ideal frequency-independent dividers (combiners) with S-parameters
Continuous Wave Model constant envelope source
Noise Model noise using current or voltage noise source in RF systems
Sinusoid Model DC offset and sinusoidal modulation
Configuration Define system simulation settings
Inport Convert Simulink input signal to SimRF signal
Outport Convert SimRF signal to Simulink output signals
Connection Port Connection port for RF subsystem
Ground Simulate connection to electrical ground


Model an RF Mixer

Expose various workflows for modeling RF systems using an RF mixer example

Model a Direct Conversion Receiver

Direct-conversion receivers are sensitive to second-order intermodulation products because they transfer the RF signal directly to baseband.

Carrier to Interference Performance of a Weaver Receiver

A classic superheterodyne architecture filters images prior to frequency conversion.

Validating IP2/IP3 Using Complex Signals

This example shows how to use the SimRF™ Circuit Envelope library to run a two-tone experiment that measures the second- and third-order intercept points of an amplifier.

Measuring Image Rejection Ratio in Receivers

This example shows how to use the SimRF™ Circuit Envelope library to calculate the image rejection ratio (IRR) for high-side-injection in Weaver and Hartley receivers.

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