Antenna sharing

If I have a wideband antenna (say 600-2700MHz), is it possible to share this one antenna between my cellular Notecard, Starnote and GPS hardware, using a 3-way u.FL cable splitter?

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rberkelm

Great idea. I did have the same thoughts. I ordered a few splitters and I will test it. Yesterday got a Notecarrier-XS board in and they are very nice. Not sure when I can report back to you.

Regards
Rob Oudendijk

Thanks Rob, I’d love to hear how you go with the splitter. Obviously, you wouldn’t be able to share the antenna for concurrent functions, but then, I don’t think the Notecard allows for e.g. the GPS to perform a fix while also doing a sync. I’d like to hear from the Blue guys have to say on this. I also noticed during the Starnote webinar that TJ had antennas attached to the GPS connectors of both the Starnote AND the Notecard. I wonder if you could just connect the Starnote GPS antenna if you only need to send the lat/longs while on NTN?

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rberkelm

Here is my current setup with a M5Stack AtomLite.

Regards,
Rob Oudendijk

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Hi All,

Our opinion is “no” - if transmit occurs on the same line as a receiver it will overload the receiver. If multiple receivers share the same receive-only antenna, they would need to have a custom matching network of some kind.

Thanks,
Rob

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Rob,

Thanks for letting us know.

Regards
Rob

Thanks for clearing that up Rob. Can you also please clarify which GPS is used for getting a fix over NTN - is it only the Starnote?

Hi @rberkelm,

When the Starnote needs to update its location, it uses its onboard GPS module (not the Notecards). You can override this by setting a “fixed” GPS position if your deployment won’t be in motion.

Rob