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
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
Hi,
Please reply of my question.we are waiting to send pcb layout in Fabrication.
Please reply.
Regards,
Irfan
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
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