I have bought a XBee-PRO 802.15.4 RF, 2.4GHz Module, 63 mW, RP-SMA Connector. Moreover, I have been studying about the antenna gain. I was wondering what is the maximum range that I can achieve while maintaining an almost spherical radiation pattern (isotropic radiation) using this Xbee? How can I calculate the range of such sphere? How does the gain of antenna (not power gain) come into this?
Many Thanks in advance