We certainly don’t see as many CB ... short-distance communication commonly used by truckers and state officials. You can only contact those in a 40- to 100-mile radius, depending on the antenna ...

There is also a short discussion on the use of magnetic loop antennas and possible shortcomings such as spurious sensitivity to electric fields.

Scientists seeking ways to synchronize the magnetic spins in nanoscale devices to build tiny yet more powerful signal-generating or receiving antennas and other electronics have published a study ...