Balun

R2026b

Model balanced-to-unbalanced conversion circuit

Since R2026b

• 

Balun block

To add a block to a model, double-click the canvas and start typing the block name. Then, select the block from the list.

Libraries:
RF Blockset / Circuit Envelope / Elements

Description

Use the Balun block to:

• Connect balanced circuits such as differential LNAs with unbalanced sources such as antennas.

• Generate equal‑amplitude, 180° out‑of‑phase signals for linear and symmetric operation.

• Enable impedance transformation for maximum power transfer.

Examples

Build RF System Using Baluns

How baluns enable differential signaling in a RF transmitter chain.

• Open Script

Parameters

To edit block parameters interactively, use the Property Inspector. From the Simulink^® Toolstrip, on the Simulation tab, in the Prepare gallery, select Property Inspector.

Reference impedances (Ohm) — Reference impedance of divider

50 (default) | positive scalar | three-tuple vector

Reference impedance of balun, specified as a positive scalar or three-tuple vector.

Ground and hide negative terminals — Ground RF circuit terminals

on (default) | off

Select this parameter to ground and hide the negative terminals. To expose the negative terminals, clear the parameter. By exposing these terminals, you can connect them to other parts of your model.

By default, this option is selected.

Programmatic Use: Add Block

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

"simrfV2elements/Balun"

Example: add_block("simrfV2elements/Balun","myModel/myBlock",MakeNameUnique="on")

Version History

Introduced in R2026b