The QPA-1800-1900-53-53S from Qualwave is a RF Amplifier with Frequency 1.8 to 1.9 GHz, Gain 53 dB, Gain Flatness 1±1 dB, Saturated Power 53 dBm, Saturated Power 199.52 W. Tags: Power Amplifier. More details for QPA-1800-1900-53-53S can be seen below.