Noise Figure Testbench

R2026b

Measures noise figure of system

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  • Noise Figure Testbench block

Libraries:
RF Blockset / Circuit Envelope / Testbenches

Description

Use the Noise Figure Testbench to measure the noise figure (NF) of an RF device under test (DUT).

Examples

Spot Noise Data in Amplifiers and Effects on Measured Noise Figure

Spot Noise Data in Amplifiers and Effects on Measured Noise Figure

A test bench model to describe the noise introduced by a 2-port device.

Measure Noise Figure of Device Under Test

Measure Noise Figure of Device Under Test

Example for Noise Figure Testbench block.

Parameters

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Parameters

Select to use testbench internal configuration block. Clear this parameter to specify your own configuration block.

Note

When using your own configuration block, parameters such as step size, fundamental tones, harmonic order, and simulate noise may affect the measured results.

Select to enable noise modeling in the stimulus signal entering the DUT and inside the DUT. In the NF testbench, this parameter is permanently disabled because stimulus noise is required for meaningful noise calculation.

Dependencies

To enable this parameter, select Use internal Configuration block.

Input power to DUT, specified as a scalar in dBm. You can change the input power by entering the value in the text box or selecting a value using the knob. The specified input power represents the power available at the input ports of the DUT. The valid values are between -90 dBm and 60 dBm.

Carrier frequency of the DUT, specified as a scalar in Hz. Input frequency must greater than baseband bandwidth.

Output frequency of DUT, specified as a scalar in Hz. Output frequency must greater than baseband bandwidth.

Baseband bandwidth of input signal, specified as a scalar in Hz. The value must be greater than zero.

Source impedance to measure DUT, specified as a complex finite scalar in ohms. The real part of the impedance must be positive.

Use this button to clear noise history used for internal noise measurement. When a DUT has an initial settling time duration, it is recommended to clear noise history after this duration. This improves the accuracy and convergence of noise measurement.

Select to view response spectrum using a spectrum scope during simulation.

Select to internally ground and hide the negative terminals. Clear to expose the negative terminals. By exposing these terminals, you can connect them to other parts of your model.

Programmatic Use: Add Block

To add the block programmatically, use the add_block function with one of these library block paths as the source.

"simrfV2testbenches/Noise Figure Testbench"

Example: add_block("simrfV2testbenches/Noise Figure Testbench","myModel/myBlock",MakeNameUnique="on")

References

[1] Razavi, Behzad. RF Microelectronics. Upper Saddle River, NJ: Prentice Hall, 2011.

[2] Pozar, David M. “Microwave Engineering”, Hoboken NJ: John Wiley & Sons, 2005.

Version History

Introduced in R2018a

See Also

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