For further information contact your local STMicroelectronics sales office.
June 2021 DB3303 Rev 4 1/4
STSW-ST25R004
Antenna matching tool for ST25R3911B/ST25R391x devices
Data brief
Features
ï‚· STSW-ST25R004 is a software that calculates
the matching network for antennas connected
to ST25R3911B/ST25R391x devices, using
Qucs (Quite Universal Circuit Simulator) to
simulate the antenna and the matching
network characteristics.
ï‚· The software supports the following products:
– ST25R3911B
– ST25R3912
– ST25R3913
– ST25R3914
– ST25R3915
– ST25R3916
– ST25R3917
Description
STSW-ST25R004 contains a graphical user
interface (GUI) to specify the antenna parameters
and the target matching. It performs transient,
AC, and S-parameter simulations of the
calculated antenna schematic.
An online version of the tool is available at
https://eds.st.com. This is part of the ST
eDesignSuite, an easy-to-use comprehensive
software helping customers during their design.
AN4974 and AN5276 (available on www.st.com)
provide guidance on the measurement of the
antenna parameters required as input for this
matching tool. With these inputs the best
matching circuit can be defined.
www.st.com
License STSW-ST25R004
2/4 DB3303 Rev 4
1 License
STSW-ST25R004 is delivered under the Mix My_Liberty (SLA0052) software license
agreement.
The software components provided in this package come with different license schemes, as
shown in Table 1.
Table 1. License scheme
Software component Owner License
ST25R Antenna Matching Tool binary STMicroelectronics ST proprietary
Qucs Qucs team GPL v2