Circuit Envelope Fundamentals

Envelope signal representation, Circuit Envelope library, and simulation

The circuit envelope technique speeds up RF system simulation. In Simulink^®, simulating high-frequency signals requires a time step proportional to the highest frequency present in the RF system. However, the modulation frequency or envelope of the RF signals can be several orders of magnitude smaller than the highest frequency. The circuit envelope technique takes advantage of this condition to model RF signals accurately while reducing simulation time. For more information on envelope signal representation, see Circuit Envelope Basics.

To learn how to build an RF system using the circuit envelope library, see Getting Started with RF Modeling.

Blocks

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Sources

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

Utilities

Configuration	Define system simulation settings
Inport	Convert Simulink input signal to RF Blockset signal
Outport	Convert RF Blockset signal to Simulink output signals
Connection Port	Connection port for RF subsystem
Ground	Simulate connection to electrical ground
Spectrum Analyzer	Display frequency spectrum of time-domain signals
Connection Label	Virtual connection between circuit envelope ports (Since R2022a)

Topics

Circuit Envelope Basics
Introduction, assumptions, advantages, definition, and work flow of Circuit Envelope simulation.
Circuit Envelope Library
Learn about Circuit Envelope library environment.
Simulate High Frequency Components
Example showing circuit envelope simulation techniques.
Model RF Mixer
Expose various workflows for modeling RF systems using an RF mixer example.