nRF52840 Dongle antenna characteristics

RE: nRF52840 Dongle antenna characteristics

NewtoM — Fri, 14 Sep 2018 09:34:38 GMT

Ok, thank you Marjeris.

Just for the case someone looks for the same information, we have found that in free field (and without any obstacles near the Dongle) there exists a "best direction", which I have drawn onto the schematics from Nordic.

Furthermore, I've found the following topic-related sites/documents useful:

http://www.gsm-modem.de/M2M/m2m-faq/embedded-antenna-bluetooth-gps-gnss/

http://www.antennamagus.com/newsletter-2016-1.php

http://www.cypress.com/file/136236/download

http://www.ti.com/lit/an/swra351a/swra351a.pdf

Tamas

RE: nRF52840 Dongle antenna characteristics

Marjeris Romero — Fri, 14 Sep 2018 07:58:07 GMT

Hi Tamas,

Yes, unfortunately this kind of measurements you will need to do yourself, since the radiation pattern will completely depend in the enviroment you are working with. So there will be a bit of trial and error when placing the sensors in a sensor network.

Best Regards,

Marjeris

RE: nRF52840 Dongle antenna characteristics

NewtoM — Thu, 13 Sep 2018 11:38:55 GMT

Hi Marjeris,

that's a pity. We wanted to know the radiation pattern exactly to optimize where and how the dongle gets plugged in.

Tamas

RE: nRF52840 Dongle antenna characteristics

Marjeris Romero — Wed, 12 Sep 2018 12:58:32 GMT

Hi Tamas,

No, we haven't characterize the nRF52840 dongle antenna. The radiation pattern of the antenna will change with where and how the dongle is plugged in, so it's difficult to say something about the radiation pattern in general.

Best Regards,

Marjeris