The FMS2003QFN is a low loss, high power and linear single pole four throw Gallium Arsenide antenna switch designed for use in mobile handset applications. The die is fabricated using the Filtronic FL05 0.5m switch process technology, which offers excellent performance optimised for switch applications. The FMS2003QFN is designed for use in dual/tri and quad band GSM handset antenna switch modules and RF front-end modules. It can also find use in other applications where high power and linear RF switching is necessary.