A broadband power amplifier (PA) is reported using the ƒ<inf>t</inf> doubling technique which delivers more than 2 W of saturated output power over a span of 6 GHz. The PA exhibits a power gain of 12.2 ± 0.2 dB over its operating frequency range, yielding a gain-bandwidth product of more than 1.5 ƒ<inf>t</inf>. The PA has an OP<inf>1dB</inf> and an OIP<inf… (More)