Hi @ssozonoff,
You may find this forum thread informative.
Otherwise, we don’t have any technical documentation on antenna performance. Personally I think the performance of the onboard Ignion antenna on the Notecarrier A is outstanding across all of our Notecards. We’ve also seen better performance/connectivity from the wideband (Cat-1) Notecards vs their narrowband (LTE-M or NB-IoT) counterparts.
Rob