TV News LIES

Wednesday, Sep 17th

Last update05:21:37 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...


Identical twin linked to 2004 rapes by new DNA test

identical twin gene dnaA Boston-area man long suspected of two 2004 rapes was formally charged after a new DNA...

Jurassic 'squirrels' push back clock on emergence of mammals

Jurrisic squirrelThe fossil remains of squirrel-like mammals with a hefty dose of cute are helping reset the...

Solar storm heading for Earth

solar flareA "strong" solar flare that launched off the sun Wednesday afternoon could cause some fluctuations in...

Scientists find larger monument buried under Stonehenge

stonehengeResearchers said on Wednesday that they have produced digital maps of what is beneath Stonehenge, Britain’s...
 
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!