"Wireless chargers transmit electricity by creating a magnetic field that oscillates at a frequency that creates a resonating vibration in magnetic coils on the

"Wireless chargers transmit electricity by creating a magnetic field that oscillates at a frequency that creates a resonating vibration in magnetic coils on the receiving device. The problem is that the resonant frequency changes if the distance between the source and receiver changes by even a small amount. In their first breakthrough three years ago, the researchers developed a wireless charger that could transmit electricity even as the distance to the receiver changes. They did this by incorporating an amplifier and feedback resistor that allowed the system to automatically adjusts its operating frequency as the distance between the charger and the moving object changed. But that initial system wasn’t efficient enough to be practical. The amplifier uses so much electricity internally to produce the required amplification effect that the system only transmitted 10% of the power flowing through the system. In their new paper, the researchers show how to boosts the system’s wireless-transmission efficiency to 92%. The key, Assawaworrarit explained, was to replace the original amplifier with a far more efficient “switch mode” amplifier. Such amplifiers aren’t new but they are finicky and will only produce high-efficiency amplification under very precise conditions. It took years of tinkering, and additional theoretical work, to design a circuit configuration that worked." A resonant structure (AKA "antenna") can be thought of as Star Trek's Transporter, version 0.0000001... A resonant coil, 0.0000002... A resonant coil to transport electricity, 0.0000003... Then of course there's this: https://www.youtube.com/watch?v=NB_hF_K_7cc https://www.youtube.com/watch?v=NB_hF_K_7cc 2:28: Montgomery Scott: "What's that?" Alternate Universe Mr. Spock: "Your equation for achieving transwarp beaming..." [He shows Mr. Scott the equation on screen...] Montgomery Scott: "Imagine that! It never occurred to me to think of space as the thing that was moving!"