Immunity Issue 2,3Ghz

[mahq]

Hello,

During the immunity testing of our product (which is utilizing nRF52840 SoC Fanstel-module BT840E) we found out that we are having issues at around 2,3Ghz and at 2,5Ghz 3V/m. Meaning that when the product is experiencing these frequencies the connection between the client and server is lost. We are having no issues with disturbances within the BLE frequency band only outside it. 

Are using an Kinsun 6602-2.4G-SMA antenna.

Anyone else been having this issue?

[Kenneth]

Hello,

There is a new revision of the nRF52840 available that can be ordered, for improved wideband blocking, see this information notice:
https://infocenter.nordicsemi.com/pdf/in_141_v1.1.pdf 

Best regards,
Kenneth

[mahq]

Hello,

Thanks for that information, seems like our modules currently are fitted with nRF52840 rev2..

Kind regards,

[Kenneth]

Hi again,

Are you using a softdevice and/or which version/protocol are you using?

Kenneth

[mahq]

Hello, sorry for late reply.

Just wanted too feedback that using revision 3 of the nRF52840 instead of revision 2 solved my immunity issues.

Kind regards,