Earlier, I asked a question about an induction loop being used to transmit Wi-Fi, or internet to anybody who was in the loop. I then realized that the loop could not pick up the data for uploads, because it is the big loop transmitting, and the small loop in the wi-fi device would not be able to send data back to the big loop.
I then commented
I also forgot about upload, I only thought of download!
But then someone commented back
skyler that's actually not so much of a problem, if you could solve all the others. If an antenna can transmit, it can usually receive as just as well.
How could the induction loop pick up the data from the small coil if it takes a huge loop around the house to send the data?