The SKY78188-11 Multimode Multiband Tx-Rx Front-End Module (FEM) supports 2G / 3G / 4G mobile devices and operates efficiently in 3G / 4G modes. The FEM consists of separate 3G/4G PA blocks operating Mid- and high bands, a silicon controller containing the MIPI RFFE interface, RF band switches, MB and HB antenna switches, bi-directional couplers, and integrated filters for Bands 1, 2, 3, 7, 34, 39, 40 and 41. RF I/O ports are internally matched to 50 ohms to minimize the need for external components. Extremely low leakage current maximizes device standby time. The IC die and passive components are mounted on a multi-layer laminate substrate. The assembly encapsulated in a 8.6 mm x 6.5 mm x 0.8 mm, 62-pad LGA, SMT, plastic package allows a highly manufacturable, low cost solution. The SKY78188-11 FEM is optimized for LTE Advanced, where Carrier Aggregation is utilized for higher data rates. The combined filtering, RF matching, and TRx switching internal to the FEM optimizes performance for popular Downlink (DL) CA band combinations, all in a compact and low cost solution. The FEM contains all necessary components between the antenna and RFIC transceiver and are optimized to provide superior Rx sensitivity and Tx efficiency. Exceptional RF coexistence planning and system techniques are employed to minimize Rx de-sensitizing (“de-sense”). For the Uplink, the PA blocks support very wide bandwidth operation by intra-band CA up to 40 MHz (200RB) for Bands 1, 2, 3 and 7, and up to 60 MHz (300RB) for Bands 40 and 41. The FEM also supports Downlink/Uplink CA.