Near-field magnetic induction communication

Near-field magnetic induction communication is like two invisible magnets talking to each other.

Let's say you have a toy car with a battery and a remote control. When you press the button on the remote, the car moves because the remote sends a signal to the car's receiver.

In near-field magnetic induction communication, there are no signals being sent through the air like in the remote control example. Instead, there are two devices with coils (like tiny wires wrapped in a circle) that can create magnetic fields when electricity flows through them.

When the coils are close together (near-field), the magnetic fields they create can interact with each other. This interaction can transmit information without using any wires or airwaves.

So when you put your smartphone on a wireless charging pad, for example, the charging pad creates a magnetic field that the smartphone's coil can pick up. This is how the phone charges wirelessly.

In summary, near-field magnetic induction communication is like two magnets talking to each other through their magnetic fields, allowing devices to communicate and transfer power wirelessly.