PCB antenna desing nRF52832 with accelerometer

RE: PCB antenna desing nRF52832 with accelerometer

davidesteban13 — Mon, 06 Aug 2018 13:36:09 GMT

Hello,

I tested the PCB with the two designs (with and without changes), and the difference is big; I'm using a PCA10031 as a sniffer with the nRF Connect (BLE). In the boards I programmed a beacon with +4 dbm. The first PCB works with -65 to -70 dbm at ~10 cm of the PCA10031 and the other between -46 to -50 dbm. After that I tested a distance of 6 meters with a wall between those, i can´t see the first PCB and the second have -75 to -80 dbm. So the changes works very good.

Thank you very much.

RE: PCB antenna desing nRF52832 with accelerometer

Andreas — Wed, 25 Jul 2018 13:56:42 GMT

Hi,

Happy to help, looking forward to hear how it works.

Best regards,

Andreas

RE: PCB antenna desing nRF52832 with accelerometer

davidesteban13 — Tue, 24 Jul 2018 18:11:40 GMT

Hi Andreas, Thank you very much for your suggestions, i will fix my PCB design and make it, when i finish i will tell you how it work.

RE: PCB antenna desing nRF52832 with accelerometer

Andreas — Tue, 24 Jul 2018 07:23:09 GMT

Hi,

The design looks good. C22 and C24 is not needed, but it does not seem you've moved forward to your layout with them, so this is fine. One thing I really recommend you fix is the keepout for the antenna, similar to what is shown in the datasheet(making a 'corner') or as I attempted to illustrate here:

Lastly, you might also want to remove the connection between C25 and the ground pour to the right, only ground it into the center pad through pin 31. This will improve spurious rejection of the filter.

Best regards,

Andreas

RE: PCB antenna desing nRF52832 with accelerometer

davidesteban13 — Mon, 23 Jul 2018 18:30:00 GMT

I'm sorry, the PCB appears only when you copy and paste the link...

RE: PCB antenna desing nRF52832 with accelerometer

davidesteban13 — Mon, 23 Jul 2018 18:22:08 GMT

hello Andreas, thanks for answer, this is the correct link https://easyeda.com/editor#id=89cadac81a994c709d8385a8e9b905d2|e96e4c6f2e414b9288230fb4b0801b6a

RE: PCB antenna desing nRF52832 with accelerometer

Andreas — Fri, 20 Jul 2018 07:51:24 GMT

Hi,

The link does not direct to your design, but to the start page of the tool you've used. You need to link to your design specifically. I am not familiar with this tool so not sure how/if that is possible, if not just export some images or something of the design.

Not able to answer until I see the design
No this will not be a problem.
Potentially, depending on the specific antenna part you used. Exactly how much is hard to say, but you should probably be able to establish at communication if you place the devices right next to each other(it should not kill the communication entirely, just limit the max range).

Best regards,
Andreas