nrf52832 schematic review

[pktron]

Hello All,

Please find the attached schematic , please review the same and give your valuable feed back , we are using NFC functionality in the same . earliest reply will be much appriciated.

Thanks in advance

pktronNRF52832_SCH.pdf

[AmbystomaLabs]

Your dual antenna arrangement won't work unless you lay it out correctly.

[jimhan1960]

Can you be more specific as to the arrangement issues? Did you notice the placement of the LNA's behind the splitters, these would be more effective in front yes?

[AmbystomaLabs]

What LNA are you referring to?  There isn't one on your design.  I see two antennae slapped together with some caps. That won't work.

[ketiljo]

The idea is probably to populate only one of the caps to be able to change the antenna without a PCB re-spin.

[AmbystomaLabs]

Even so they would still need to do the layout correctly or they will get a open stub on the line.

Their antenna measurements stated that both elements were active at the same time.  Due to the poor match their antenna efficiency was -8dB which is 6dB down from the antenna spec. Or another way to look at it is, they just halved their range.

I think they really think they can put two antennae together like that. Earlier they referred to it as a splitter.

Little do they know!