nRF52 DK bluetooth radiation diagram

RE: nRF52 DK bluetooth radiation diagram

Jared — Wed, 01 Sep 2021 12:04:45 GMT

Hi,

Not sure exactly who did it, but as it was posted by us you can assume that it was done by one of our engineers.

Keep in mind what Andreas wrote:

[quote user="boan"]This should serve as an indication only, when mounted in your setup, any differences in mounting/setup or close proximity will change the radiation pattern. As you can see from this there are some angles where the signal strength is close to or more than 10 dB.[/quote]

regards

Jared

RE: nRF52 DK bluetooth radiation diagram

daNonBoard — Wed, 01 Sep 2021 09:09:31 GMT

I have a question regarding the posted characterization of the nRF52 DK... Is there any source who did this/from where it is? That would be really helpful because I need to use it for some comparison in my research.

RE: nRF52 DK bluetooth radiation diagram

Andreas — Mon, 27 Aug 2018 10:59:45 GMT

Hi José,

We do not know this unfortunately.

Best regards,

Andreas

RE: nRF52 DK bluetooth radiation diagram

Jose Costa — Mon, 27 Aug 2018 08:59:23 GMT

Hi Andreas,

Regarding the diagrams, can you please tell what are the reference angles, i.e., where angle 0º points to both horizontally and vertically?

Thank you very much!

Best Regards,

José Costa

RE: nRF52 DK bluetooth radiation diagram

Andreas — Mon, 20 Aug 2018 13:51:51 GMT

Hi Jose,

I can not recommend any antennas as I do not know what kind of antenna you need. I suggest browsing through what your distributor can provide.

When using the DK, the J1 coaxial switch will automatically switch the RF path into a probe cable, and thus the external antenna, once it is inserted. If you use a different solution you will have to disconnect it, yes.

Best regards,

Andreas

RE: nRF52 DK bluetooth radiation diagram

Jose Costa — Mon, 20 Aug 2018 12:57:05 GMT

Hi Andreas,

Thanks for your reply.

Can you point/recommend what external antennas can be used?

Do I need to deactivate the PCB antenna in order to use an external one?

Best Regards,

José Costa

RE: nRF52 DK bluetooth radiation diagram

Andreas — Mon, 20 Aug 2018 11:09:16 GMT

Hi José,

There has been some simple characterization done: devzone.nordicsemi.com/.../nRF52_5F00_DK.zip

This should serve as an indication only, when mounted in your setup, any differences in mounting/setup or close proximity will change the radiation pattern. As you can see from this there are some angles where the signal strength is close to or more than 10 dB.

Using an external antenna will probably remove this as a problem. The system will still be subject to reflections and changes in the channel though, and this might cause just as much variation to the signal strength.

Best regards,

Andreas