A research team has built a Hall rectenna based on the type-II Weyl semimetal NbIrTe4 that, according to a study in Nature ...

Many current wireless communication, imaging and sensing technologies rely on components that convert oscillating electric ...

While the world sprints toward ever faster mobile speeds, another connectivity story is quietly unfolding at the opposite end of the dial. Low-frequency spectrum—the radio bands below one gigahertz ...

Caltech scientists have developed a new way to produce optical frequency combs—important tools in devices that keep time and ...

Sound can be represented with both analog or digital audio signals. Analog audio signals use electrical voltage levels. Different types of transducers convert sound to electrical signals and ...

A software-defined radio (SDR) uses a general-purpose computer processor to perform aspects of digital signal processing in place of analog circuit hardware. This allows for greater flexibility in ...

A recent SETI Institute study suggests that space weather could blur and weaken extraterrestrial radio signals long before ...

In the 1997 movie “Contact,” a scientist, played by actress Jodie Foster, detects a radio signal – the first communication from an extraterrestrial civilization. That story, penned by Carl Sagan and ...