In the global game of nuclear brinksmanship, secrets are the coin of the realm. This was especially true during the Cold War, when each side fielded armies of spies to ferret out what the other guy ...

Add Yahoo as a preferred source to see more of our stories on Google. Small drones can be hard to track at night. Kevin Carter/Getty Images The recent spate of unidentified drone sightings in the U.S.

Self-interference cancellation (SIC) constitutes a critical enabler for in-band full-duplex radio-frequency communications, whereby a transceiver simultaneously transmits and receives on the same ...

Hybrid FSO/RF systems integrate optical laser links and conventional radio connections to exploit the high-capacity, low-latency attributes of free-space optics alongside the resilience of ...

The three major mobile carriers are reaching out for frequencies with special properties. This could save providers billions – at the expense of others.

An experimental antenna has received both radio frequency and near-infrared laser signals from NASA's Psyche spacecraft as it travels through deep space. This shows it's possible for the giant dish ...

In late 2023, NASA tested a new hybrid laser/radio antenna to downlink data from 20 million miles (32 million kilometers) away at a rate of 15.63 megabits per second – about 40 times faster than radio ...

The recent spate of unidentified drone sightings in the U.S., including some near sensitive locations such as airports and military installations, has caused significant public concern. Some of this ...