Hello, I previously learned that the nRF54L15-DK only supports a single antenna for Bluetooth 6.0 channel ranging and lacks a multi-antenna design approach or official guidance for implementing multi-antenna configurations. I'd like to inquire whether

[Tinao]

Hello, I previously learned that the nRF54L15-DK only supports a single antenna for Bluetooth 6.0 channel ranging and lacks a multi-antenna design approach or official guidance for implementing multi-antenna configurations. I'd like to inquire whether any Nordic series development boards or chips supporting Bluetooth 6.0 channel ranging also support multi-antenna mode.

[Samruddhi Jadhav]

Hi,

Nordic's channel sounding implementation supports multi-antenna mode in the protocol stack and SDK. SoftDevice controller and libraries support multi-antenna channel sounding (up to 4 antenna paths configured with Kconfig options). However,  our docs don't mention any DKs with a already made multi-antenna channel sounding RF design. nRF54L series radio does support channel sounding but the nRF54L15 contains only one PCB antenna. If you want to use multi-antenna channel sounding, you can choose a board supporting channel sounding. Then, add an external RF switch or antenna network. You can use cs_antenna_switch_func() and devicetree to configure it. I would recommend you to take a look at our Multiple antennas documentation.

Best Regards,

Samruddhi

[Tinao]

Thank you very much for your reply. I have consulted the documentation on multiple antennas, which discusses configuration methods for multiple antennas. It states that currently, none of the Nordic development boards include hardware support for multiple antennas; the documentation only discusses configuration approaches. Have I understood correctly?

[Samruddhi Jadhav]

Hi,

Yes, you are right. According to our documentation, the development boards don't provide multiple antennas for Bluetooth Channel Sounding. They only suggest how to configure multiple-antenna support for channel sounding. The nRF54L15 DK has a single antenna path and connecting more antennas would have to be done externally. 

Best Regards,

Samruddhi

[Tinao]

Thank you for your patient explanation. I should also like to enquire whether Nordic currently offers other development boards supporting channel ranging for multiple antennas. I wish to utilise these for learning purposes.

[Samruddhi Jadhav]

Hi,

The SoftDevice Controller which is used for channel sounding on the nRF54 series (such as nRF54L15, nRF54LM20, nRF54LV10, nRF54H20) can use/supports multiple antennas for channel sounding. For nRF54L15, these must be added in hardware and configured in software by you. The DK board itself normally only has 1 antenna on it. 

Best Regards,

Samruddhi