Tag

Beamforming

All articles tagged with #beamforming

technology24 days ago•3 min saved

Ukraine’s Drones Go Narrow-Beam: Focused Antennas Boost Stealth and Link Stability

Ukrainian attack drones are adopting directional, gimbaled antennas that focus signals toward a repeater to strengthen the control link and reduce detectability. The tech, now used on Vampire bombers and Baton drones (and others like Darts and Hornet), benefits from miniaturization and is supported by Ukrainian suppliers. Russia counteracts with large Starlink jammers, highlighting the ongoing contest between comms resilience and jamming in the battlefield.

via Euromaidan Press|

#beamforming #directional-antennas #drones

military1 month ago•10 min saved

New anti-jamming satellite antenna slashes power use by 95%

MIT Lincoln Laboratory is developing a lightweight scanning reflectarray antenna (HoNi BAJR) for proliferated low-Earth orbit to protect military satellite links from electronic attacks, delivering advanced beamforming with about 95% less power and a smaller footprint; calibration remains a key challenge as researchers test wide-angle scanning and multi-user beams for future spacecraft constellations.

via Interesting Engineering|

#anti-jamming #beamforming #military

technology1 month ago•6 min saved

Everyday WiFi Could Identify You Without a Device

German researchers demonstrated that ordinary WiFi signals can identify people with near-perfect accuracy by analyzing how radio waves reflect off their bodies using beamforming feedback information, even if the person isn’t carrying a device or has their phone off. The finding raises serious privacy concerns, suggesting routers could serve as covert surveillance tools; experts urge safeguards in the upcoming IEEE 802.11bf standard.

via ScienceDaily|

#ai #beamforming #privacy

technology1 month ago•7 min saved

DIY Wi‑Fi Reflector: Foil Behind the Router Focuses Signals—With Important Tradeoffs

A Dartmouth study showed curved, precision-shaped aluminum reflectors can steer Wi‑Fi and boost signal in a specific direction by up to about 50%, but DIY foil behind a router yields smaller gains (roughly 10–20%) and concentrates existing power rather than increasing total output. It can cause overheating and is not a substitute for proper router placement, extenders, or mesh systems; regulatory limits mean this is a temporary, directional tweak rather than a fix-all.

via Indian Defence Review|

#aluminum-foil #beamforming #signal-strength

technology5 months ago•7 min saved

WiFi Signals Could Identify People Without Their Devices

KIT researchers show that ordinary WiFi traffic can be analyzed to reconstruct camera‑like images and identify people without anyone carrying a device, achieving near‑perfect accuracy in their study and raising privacy concerns that call for stronger protections in the IEEE 802.11bf standard.

via SciTechDaily|

#beamforming #identity-inference #privacy