RE: Ceramic antenna and touch switch placement

Andreas — Tue, 26 May 2020 11:47:20 GMT

Hi,

You should replicate the mounting instructions for the antenna, described in the antenna datasheet, and the reference layout for the nRF24 which is described in the nRF24 Product Specification. If there is conflict with other components you should prioritize the antenna and nRF24 if you do not want RF performance to be degraded, especially if you do not have experience with RF. You should also consider submitting your design here for a review.

Best regards,

Andreas

RE: Ceramic antenna and touch switch placement

awneil — Tue, 26 May 2020 11:20:12 GMT

[quote userid="90634" url="~/f/nordic-q-a/61806/ceramic-antenna-and-touch-switch-placement"]AT42Q1012[/quote]

Did you mean AT42QT1012?

That's a Microchip (formerly Atmel) product - nothing to do with Nordic:

http://ww1.microchip.com/downloads/en/devicedoc/40001948a.pdf

For support with that, you need to contact Microchip.

[quote userid="90634" url="~/f/nordic-q-a/61806/ceramic-antenna-and-touch-switch-placement"]I think that the antenna can affect the switch and inadvertently turn on/off the system.[/quote]

What makes you think that?

Or are you saying that you're getting "random" switching, and guessing that this might be the cause?

If that's the case, surely the first thing to try is to disable the touch sensor ... ?

[quote userid="90634" url="~/f/nordic-q-a/61806/ceramic-antenna-and-touch-switch-placement"]I have no experience with RF[/quote]

A common mistake is to under estimate the peak currents drawn by radio transmitters, so an inadequate power supply browns-out during these "spikes" ...