(PhysOrg.com) -- Researchers have discovered a way to capture and harness energy transmitted by such sources as radio and television transmitters, cell phone networks and satellite communications systems. By scavenging this ...
Engineering
Jul 7, 2011
14
1
New research by academics in the University of Bristol's Centre for Communications Research has highlighted the problems of reduced sensitivity in wireless communications, along with developing new solutions to overcome the ...
Engineering
Feb 28, 2011
0
0
(PhysOrg.com) -- Cheaper, lighter and more energy-efficient broadband devices on communications satellites may be possible using metamaterials to modify horn antennas, according to engineers from Penn State and Lockheed Martin ...
Engineering
Jan 31, 2011
4
0
(PhysOrg.com) -- Just as walkie-talkies transmit and receive radio waves, carbon nanotubes can transmit and receive light at the nanoscale, Cornell researchers have discovered.
Nanomaterials
Dec 21, 2010
7
0
Satellite TV without having to set up a receiver dish. Digital radio on your mobile phone without your batteries quickly running flat. The advanced calculations needed for these future applications are made possible by a ...
Computer Sciences
Oct 19, 2010
0
0
(PhysOrg.com) -- The first major radio telescope to be built in Britain for many decades will 'listen' to the sky at FM frequencies, providing vast quantities of data to a supercomputer in Holland, paving the way for unexpected ...
Astronomy
Jun 9, 2010
0
2
(PhysOrg.com) -- Remote central locking is among the most convenient aspects of modern motoring. Transmission of the radio signal that activates the system is not particularly secure, however. A new encryption technique increases ...
Engineering
Feb 1, 2010
0
0
Trackside transit workers may soon be sporting RFID tags to improve their safety.
Engineering
Jan 21, 2010
0
0
(PhysOrg.com) -- Engineering researchers at the University of Arkansas have developed a unique and robust method to prevent cloning of passive radio frequency identification tags. The technology, based on one or more unique ...
Engineering
Nov 19, 2009
0
0
More than 120 years after the discovery of the electromagnetic character of radio waves by Heinrich Hertz, wireless data transmission dominates information technology. Higher and higher radio frequencies are applied to transmit ...
Nanophysics
Oct 20, 2009
0
0
