SKY65933-11 & SKY65943-11 Front-End Modules (FEM) Skyworks Solutions Inc. SKY65933-11 & SKY65943-11 Front-End Modules (FEM) feature an integrated low-noise amplifier (LNA), pre-filter, and post-filter. The modules are designed for Global Navigation Satellite System receiver applications. The devices fully integrate all input and output matching components to simplify PCB designs. The pre-filter and post-filter provide low in-band insertion loss and excellent rejection for the cellular, PCS, and WLAN frequency bands.