We still have to do antenna radiation measurements in order to answer you question. Based on real life situations we’ve already seen incredible results with our module reaching a distance of over 15 kilometers while just laying on our desk.
I like to add that antenna performance numbers may be misleading. Our module design was simulated for isotropic radiation, which has a gain of 0 dB. Antennas with a higher gain will bundle energy in a certain direction (a sattelite dish can have a gain of +50dB to where it points at but -80dB or even higher at the back).
Commonly, LoRaWAN devices are placed regardless the position of their gateways and therefore an isotropic radiation pattern will be best (0 dB).
The return loss (S11) measurements we did on our antenna are really influenced by nearby materials and antenna placement. We optimized for mounting the device in a plastic enclosure, 5-10mm spacing on bottom and top, mounted on different materials. We got a return loss of -25…-10 dB (at -10dB, 10% of the transmitted power is reflected, which is very good as you remind that with 200% of the output power, you’ll reach twice as far).
At the moment we support Class A, ADR, OTAA and ABP, with a locked-down LoRa Alliance certified (pending) stack.
The device can operate in uplink-only as well as in up-downlink mode.