20dBM difference between NORA-B106 and nRF5340 Nordic DK.

[kammutierspule]

I have a BLE code, when it runs on NORA-B106 it gives me -20dB difference on comparison to nRF5340 Nordic DK.

It was not expected such a big difference, what could be the cause?

[Turbo J]

Poor PCB layout is a likely cause.

Have a look into the "NORA-B1 System integration manual" from Ublox that details how the PCB must be designed under the antenna.

If you had a ground plane or traces below the RF keepout, poor performance will be the result.

[kammutierspule]

should be ok, because I also tested on NORA-B106 development board, it gives me the same difference.

[JONATHAN LL]

You can ask for a PCB review if you want, just create a new ticket and we will help. 

Also, have you tested more then one BLE sample?

regards,
Jonathan

[kammutierspule]

I tested on module supplier development kit board, yes I also tested another zephyr samples.

[JONATHAN LL]

How are you measuring the value?