TV News LIES

Friday, Mar 06th

Last update06:48:48 AM GMT

You are here News Science Seeing Through Walls With a Wireless Router

Seeing Through Walls With a Wireless Router

U.S. Navy researchers stumbled upon the concept of radar when they noticed that a plane flying past a radio tower reflected radio waves.

Scientists have now applied that same principle to make the first device that tracks existing Wi-Fi signals to spy on people through walls.

When a radio wave reflects off a moving object, its frequency changes—a phenomenon called the Doppler effect. Their radar prototype identifies frequency changes to detect moving objects. It’s about the size of a suitcase and contains a radio receiver composed of two antennas ­and a signal-processing unit.

In tests, they have used it to determine a person’s location, speed and direction—even through a one-foot-thick brick wall. Because the device itself doesn’t emit any radio waves, it can’t be detected.

More...


Most Recent Related Stories...


Jaw bone discovered in Ethiopia is oldest known human lineage remains

jaw bone oldest homo fossilA lower jaw bone and five teeth discovered on a hillside in Ethiopia are the oldest...

Scientists photograph light as particle and wave

light particle and waveLight behaves both as a particle and as a wave. Since the days of Einstein, scientists...

UK scientists work out weight of Sophie the Stegosaurus

StegosaurusScientists at a British museum have worked out the living weight of Sophie, one of the...

'Most powerful' X-ray machine opens new frontier

new x-ray machineResearchers in Palo Alto in the US state of California have developed the most powerful X-ray...
 
America's # 1 Enemy
Tee Shirt
& Help Support TvNewsLIES.org!
TVNL Tee Shirt
 
TVNL TOTE BAG
Conserve our Planet
& Help Support TvNewsLIES.org!
 
Get your 9/11 & Media
Deception Dollars
& Help Support TvNewsLIES.org!
 
The Loaded Deck
The First & the Best!
The Media & Bush Admin Exposed!