The Hackrf is a small affordable SDR (software Defined Radio) that can operate in frequencies up to 6GHz with a channel bandwidth of 20MHz. This makes it an excellent choice when it comes to experimenting with WiFi. One of the few drawback of a Hckrf is the lack of amplification on the Tx side. In this experiment I was successful in amplifying the transmit signal of a Hackrf by 30dB using a Skyworks FEM ( Front-End Module).
GNU radio is used to generate an 64 tone OFDM signal which is forwarded to the Hackrf. I will be writing a detailed post on how to replicate this experiment in the future. For now I would like to share with my readers short videos showing the difference in Tx power with and without the a FEM.