The QPF4228 from Qorvo is an integrated front-end module (FEM) for Wi-Fi 802.11ax systems. It consists of an integrated 2.4 GHz power amplifier (PA), regulator, SP3T switch, low noise amplifier (LNA), coupler and DC power detector. The FEM has a compact form factor and integrated matching minimizes layout area requirements in the application. The performance of the device is focused on optimizing the PA for a 3.3 V supply voltage that conserves power consumption while maintaining the highest linear output power and leading-edge throughput. The receive path matches the optimal technologies to maximize Rx sensitivity through noise figure performance that is consistent over a wider variety of conditions. Integrated die level filtering for 2nd and 3rd harmonics, as well as 5 GHz rejection for DBDC operation, are included.
