I'm using this Mitsubishi RF amplifer in a portable device. The Mitsubishi amp operates well between 7V - 9V.
But I have to interface with a power source that gives 1.5V, and stepping 1.5V up to 7V seems like a huge waste.
Are there any RF amps for a 400 MHz signal that operate closer to 1.5V? Or are there any super efficient step up regulators?