I have 4x 50mw Xbee 900 Mhz modules(XBee Pro 900 RPSMA), 2 in the UAV and 2 in the base station. Each pair of xbees will have a different PAN ID.
I am concerned that the transmit side of one Xbee will flood the rx side of the other Xbee, due to the close proximity of the antennas.
What should be the minimum distance between antennas, and should I cross polarize the antennas(one horizontal, one vertical), or is this not an issue with Xbees on different PAN IDs?