RE: Nrf52840-dongle external antenna

Martin Sivertsen — Tue, 02 Nov 2021 22:04:08 GMT

Hello Joël,

Have you added a PA and an LNA to the nRF24L01 and would like to do the same on the nRF52840?

How did you attach the PA and LNA to the nRF24L01?

What antenna are you using?

How are you attaching it, do you have pictures?

Any antenna needs to be tuned to the board it is connected to either by adjusting the length of the antenna or by using a matching network/circuitry (the three components that R1 are a part of), I recommend taking a glance at this white paper we have on antenna tuning: https://infocenter.nordicsemi.com/pdf/nwp_017.pdf?cp=17_14

You might get some added range if you get the new antenna properly matched, so that as much as possible of the power from the radio is radiated outwards and not reflected back to the radio, but without an added PA and LNA I can't see that range increasing substantially.

Best regards,

Martin S.

RE: Nrf52840-dongle external antenna

Joel V — Fri, 29 Oct 2021 17:49:41 GMT

Update: I tried solder an antenna before the R1 on the mounted board of the nrf52840-dongle and the signal is still unstable and the range does not or almost not increase. Any suggestions ?

RE: Nrf52840-dongle external antenna

Joel V — Fri, 29 Oct 2021 17:20:36 GMT

When I say nrf24L01, i am talking of the nrf24L01+PA+LNA