Antenna Gain??????????? Hi all, I am really confused by the subject of antenna gain. I have no problem with the idea of the idea that an antennas performance should be related to how welll it focusses radiation relative to an isotropic emitter. Bus as this gives a figure greater than one I really don't understand how it can be used in power calculations. Signal Power = Transmitted Power * Transmitting Antenna Gain * Recieving Antenna Gain / Losses in cables and through the medium This equation to me suggests that if you placed two antennas opposite each other they will generate energy. Obviously this is wrong, but what am I not seeing?????