WASHINGTON (Army News Service) -- The Defense Advanced Research Projects Agency is working now to develop a backup system to be used by service members in the event that access to the Global ...

Recent mine disasters have shown the need for improved communications underground. While broadcasters face challenges getting signals into urban canyons, sending RF through a thousand feet of rock and ...

The US Department of Energy's SLAC National Accelerator Laboratory has developed a compact antenna that can transmit radio signals not only over long distances through the air, but also underwater, ...

A DARPA project could enable radio to be transmitted through water and rock. Radio frequency signals hit veritable and literal walls when they encounter materials like water, soil, and stone, which ...

A quantum physics-based technology developed by National Institute of Standards and Technology researchers may enable first responders, warfighters and mariners to communicate and navigate in areas ...

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 ...

This story originally appeared in TV Technology. While frequencies near the upper end of the RF spectrum — 60 GHz up to the terahertz range — are gaining attention due to their ability to transmit ...

Humans have long been shaping Earth's landscape, but now scientists know that we also can shape our near-space environment with radio communications, which have been found to interact with particles ...