Sona™ IF573 - WiFi 6E + Bluetooth® 5.4 Module
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Antenna Type
Chipset (Wireless)
Infineon CYW55573
Form Factor
M.2 2230
2.4 / 5 / 6 GHz
Host Interface
Product Type
Embedded Module
System Architecture
802.11ax, Bluetooth 5.4

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Is it possible to operate the Sona IF573 Wi-Fi module with 2 antennas?

Wi-Fi MIMO requires the use of two Wi-Fi antennas, hence 2 antennas is the minimum.

If the application the IF573 is used in demands the use of Bluetooth as well a third antenna is required.

For performance reasons the Bluetooth part of the IF573 has its own antenna.

Does the Sona-IF573 support VSDB?

Yes, the Sona-IF573 supports Virtual Simultaneous Dual Band (VSDB) operation.

In an AP and STAion (APSTA) kind of application it is necessary to bring up up the access point (AP) in one band before connecting as a STAtion in the other band.


Can I use btattach instead of brcm_patchram_plus with the Sona IF573?

No, the traditional btattach implementation for BT serial interfaces that relies on vendor

specific modules in the kernel is not sufficient because it has no mechanism to

incorporate BT_REG_ON/W_DISABLE2# control.

Is CTS/RTS hardware handshake mandatory when operating the IF573 UART?

Yes, it's mandatory to enable CTS/RTS in UART, otherwise BT firmware won't be loaded.

In 6GHz band, is WPA3 able to run in transition mode?

Transition mode is to support WPA2 and WPA3 at the same time. In 6GHz band, WPA2 is no longer supported, but just WPA3, and no support of  transition mode as well.

Is it necessary in the 6GHz band to use H2E mode in WPA3? Or is it still possible to use HNP (hunt/peck) mode?

According to WI-Fi alliance, only H2E mode is supported in WPA3. It's no longer possible to use HNP (hunt/peck).