SKY68031-11 Multi-Band RF IoT Front-End Module Skyworks Solutions Inc. SKY68031-11 Multi-Band RF IoT Front-End Module is a low-profile, multi-band RF front-end (RFFE) module supporting LTE-M/NB-IoT transceiver platforms. The module integrates the entire RF front end necessary for an LTE multi-band radio operating in low-band (5, 8, 12, 13, 14, 17, 18, 19, 20, 26, 28, 85) and mid-band (1, 2, 3, 4, 25, 39, 66, 70) frequencies. This feature includes broadband PA with bias controller, TX low-pass harmonic filter, antenna switch, and MIPI RFFE controller.