My first thought about this is that they really should be using a higher frequency signal because a higher frequency signal requires smaller antennas to both transmit and receive because the wavelength of the radio wave is smaller. I believe they are using PCS 1900 megahertz, but it seems like this would work better if they were using their C band at 3700 megahertz or their 2.5 gigahertz because of the smaller frequency and therefore the antennas would be larger compared to the wavelength of the radio wave.