[amsat-bb] Frequency Doubler?

Does anyone remember how to make a High level frequency doubler? I need some energy on 902 MHz, and wonder about just blasting some diodes with a 451 MHz transmitter? (followed of course by a filter)...

Seems like a full wave rectifier would give a strong 2X frequency component?

I wonder if 1N4005's would do? At 50W input the capacitance per diode is around 1 pF Bob, WB4APR