SKY66118-11 FEM for BLUETOOTH® IoT Applications Skyworks Solutions Inc. SKY66118-11 Front-End Module (FEM) for BLUETOOTH® IoT Applications is a high-performance, fully integrated RF FEM designed for Bluetooth, Zigbee®, and Thread applications. This FEM is designed for ease of use and maximum flexibility. The SKY66118-11 FEM integrates a +20dBm power amplifier, RF switches, output matching, and harmonic filtering. This FEM supports three modes of operation - transit mode, bypass mode, and an ALL OFF sleep mode. Skyworks Solutions Inc. SKY66118-11 FEM features low transmit current consumption and can operate over a wide supply range.