Design of triple band antenna array for GSM/DCS/UMTS handset localization

We present the design of single feed, triple band antenna based on two micro strip feeding techniques, shifted pin and electromagnetic coupling, to achieve three different radiation modes. An array of five antennas is manufactured for the localization of mobile handsets functioning at GSM, DCS and UMTS bands. Then we study the amplitude and phase errors of the radiation pattern due to mutual coupling and finite ground effect, with the help of the spherical decomposition technique.