Tell us about yourself!
Congratulations! You built a full-wave rectifier! You passed the first chapter of basic electronics. Unfortunately, this particular rectifier is an extraordinary waste of time. It produces a negligible amount of power. Your oscilloscope voltage reading is meaningless. Power is voltage TIMES current, and something like this will produce current in the range of nano-Amperes. Just get some solar cells and call it a day. They absorb energy from the peak of the sun's blackbody radiation spectrum (which happens to be visible light), not in the negligible radio frequency range. The cheapest, least efficient solar cells out there will produce orders of magnitude more power.