SKY660x-11 Linear Power Amplifiers Skyworks Solutions Inc. SKY660x-11 Linear Power Amplifiers are fully-matched surface mount modules developed for WCDMA applications. These linear power amplifiers meet WCDMA femtocell applications' stringent spectral linearity requirements with high power-added efficiency. The SKY660x-11 power amplifiers are GaAs Monolithic Microwave Integrated Circuits (MMICs), containing all active amplifier circuitry, including input and interstage matching circuits. These power amplifiers are manufactured with Skyworks InGaP GaAs HBT process, which provides for all positive voltage DC supply operation and maintains high efficiency and linearity.