Abstract: In this letter, an electrically small Vivaldi antenna using active matching is presented for wideband applications. The structure consists of a passive Vivaldi antenna and a non-Foster ...

Our weekly roundup of the latest science in the news, as well as a few fascinating articles to keep you entertained over the ...

NASA's Johnson Space Center in Houston closed 2025 with major progress across human spaceflight, research, and exploration.

Japan has deployed a system that fires laser beams with 100 kilowatts of energy — powerful enough to disable small drones. It was installed on board a 6,200-ton (6.3 million kg) warship.

The energy sent is low-intensity, invisible infrared light, which allows ground-based solar projects to generate power even ...

A Star Trek–inspired idea by Miguel Alcubierre kicked off decades of theory and experiments as scientists pursue plausible ...

Abstract: Fast-growing Internet of Things (IoT) has drawn intensive attention and massive applications, leading to high demand for wireless communications in complex environments. Hence, this article ...

Far beyond the orbit of Pluto, a spacecraft the size of a small car has started speaking in riddles. Voyager 1, humanity’s most distant emissary, spent months transmitting data that looked less like a ...

For the first time in its 25-year history, all eight docking ports on the International Space Station are occupied, according to NASA. The rare "orbital traffic jam" occurred after Northrop Grumman's ...

There’s a race in China among several companies vying to become the next to launch and land an orbital-class rocket, and the starting gun could go off as soon as tonight. LandSpace, one of several ...

The Space Engineers 2 alpha is coming along nicely as fans of the first game ready themselves for the full-blown sequel. This update, Planets & Survival Foundations, introduces fully explorable ...