In April 2008, in collaboration with Dr. Antonio Di Noia, I designed a base station array at frequency band 870 – 960 MHz for GSM cellphone networks. The design consisted of two phases; first: the required feeding current amplitudes and phases were computed in Matlab to satisfy the required specs (e.g.: beamwidth, tilting, etc); second: the array element size and positions were identified to obtain the required bandwidths, gains, VSWR, etc, using CAD software 4NEC.