Q: What GPS antenna can be used with ORS ?
A: In our lab, we use ANN-MS Active GPS antenna (Datasheet: https://www.mouser.fr/datasheet/2/1025/ANN_MS_DataSheet__UBX_15025046_-3180083.pdf).
You can use any model that is compatible with 3.3V, impedance 50 Ohms, SMA Plug.