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? 

[kammutierspule]

With some Android App (eg: nRF Connect)

[JONATHAN LL]

So both the module and the Module DK preforms the same in comparison to the Nordic DK?

You can check with U-Blox and ask what numbers they would expect. But there is not much we can do to improve the modules performance. You can set the MAX output power but that about it. 

Regards,
Jonathan