nRF52840 Design Review Request

[Irfan Memon]

Hi,

We are developing nRF52840 based design with PCB antenna.

Please review the Schematic and PCB file.

Regards,

IrfanMeshtek_nRF52840_V1.0 PCB ANT_SCH.pdf20210607_nRF52840 Layout.PcbDoc

[Irfan Memon]

Hi,

Please reply of my question.we are waiting to send pcb layout in Fabrication.

Please reply.

Regards,

Irfan

[ketiljo]

Hi Irfan

Sorry for the late reply, I've been away a few days. 

The problem is that you have cutout on all layers under the RF section and at least one layer must be ground.  Layer 3 is split into power and VDD so you have only layer 2 as ground left.

Parasitic capacitance to ground isn't a great problem on nRF52 devices. It used to be a problem on nRF51 devices since the matching network had more components. 

cheers,

Ketil