Using digital techniques has caused a resurgence of interest in VLF — very low frequency — radio. Thanks to software-defined radio, you no longer need huge coils. However, you still need a suitable ...

Even as 5G looms, losing the signal on your phone seems like a headache that will never quite go away. Now, though, a new antenna design could take wireless communications to previously radio dead ...

While everyone is focused on RF signals in the gigahertz-plus range, it’s important to remember that the other end of the electromagnetic spectrum also has its uses. However, signals in ...