Like most waves in the electromagnetic spectrum, radio waves tend to bounce off of various objects. This can be frustrating to anyone trying to use something like a GMRS or LoRa radio in a dense city, ...

COLOGNE, Germany — The German Air Force has begun testing so-called passive radar as a complementary surveillance technique for ground-based air defense formations, aimed at helping covert operations ...

Add Yahoo as a preferred source to see more of our stories on Google. GRAZ, Austria — German sensor specialist Hensoldt has released a standalone package of its Twinvis passive radar, a technology ...

PM Andrej Babiš proposed deploying passive radar to the Strait of Hormuz, citing Czechia's history of radar expertise.

British engineers from University College London have developed a passive radar system that can see through walls using the WiFi signals generated by wireless routers and access points. The system, ...

Sean Peters is leading a major multi-institutional initiative to develop power efficient passive radar systems that could peek under the surface of Mars. Peters has earned a $2.45 million, three-year ...

The Czech Republic is prepared to offer a passive radar system to help secure the Strait of Hormuz once the situation in the region stabilizes, Prime Minister Andrej Babiš said on Friday. Speaking to ...

U.S. stealth aircraft like the F-35 Lightning II are often described as “invisible” to enemy radar, but that label oversimplifies a complex technical reality. While low-observable technology ...

Ukraine has begun fielding acoustic sensor systems designed to detect low-flying drones earlier than conventional radar, a development that addresses one of the war’s most persistent tactical problems ...