Building a wireless energy transfer systems with a transmitting and receiving antenna. I have encountered a problem with what appears to be a floating ground. Initial testing is done with a normal LED that will only light when I have my finger touching one of the leads on the LED. Further testing is done by connecting the receiving antenna to an oscilloscope probe. When only the lead of the probe is connected to the antenna, I get a voltage reading in the tens of volts range depending on the distance. When I connect the ground probe of the oscilloscope, I get a voltage reading of only a couple of volts. I am looking for some any kind of explanation to what can be happening here.