News tagged with electromagnetic signals
Microsoft advocates new WiFi-NC to make use of white spaces in spectrum
(PhysOrg.com) -- Four years ago, the FCC began allowing limited use of the so-called white spaces in the electromagnetic spectrum that is shared by all wireless devices (in the United States). The white spaces ...
Jan 09, 2012 |
4.3 / 5 (6) |
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Graphene may open the gate to future terahertz technologies
Nestled between radio waves and infrared light is the terahertz (THz) portion of the electromagnetic spectrum. By adding a nanoscale bit of graphene, researchers have found a better way to tune radiation for a THz transmitter.
Sep 12, 2011 |
4.9 / 5 (7) |
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North Korea upgrades jamming devices: report
North Korea is upgrading jamming devices to disrupt South Korean military communications, Yonhap news agency said Tuesday, citing a defence ministry report.
Sep 06, 2011 |
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Perfect communication with imperfect chips
One of the triumphs of the information age is the idea of error-correcting codes, which ensure that data carried by electromagnetic signals — traveling through the air, or through cables or optical fibers ...
Technology / Computer Sciences
Aug 05, 2011 |
2.8 / 5 (4) |
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Testing the T-shirt antenna
NPL worked with BAE Systems Advanced Technology Centre, to measure the pattern and efficiency of radiation emitted from next generation wearable antennas embedded in T-shirts.
Jun 30, 2011 |
3 / 5 (1) |
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FAA warns pilots in Las Vegas vicinity on GPS
Pilots flying at night near Las Vegas over the next week may have to navigate the old-fashioned way - without GPS.
May 18, 2011 |
4.8 / 5 (4) |
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Off-the-shelf electronics turn up gain on spectroscopy
Whether the object of attention is a novel aspect of the universe or an enigmatic and distant colleague, listening is key to nearly any effort to seek understanding. And not just with your ears. Spectroscopy, the study of ...
Jan 11, 2011 |
3.7 / 5 (3) |
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Radio Waves: Alternative Power Source
(PhysOrg.com) -- Researchers at Duke University are harvesting ambient radio waves to power small microprocessor devices that consume very little energy. Devices such as sensors that monitor critical environmental ...
Jul 20, 2010 |
4.2 / 5 (13) |
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Physicists build quantum amplifier with single artificial atom
(PhysOrg.com) -- By demonstrating how a single artificial atom can be used to amplify electromagnetic waves, physicists from Japan are opening up new possibilities for quantum amplifiers, which can be used ...
May 25, 2010 |
4.4 / 5 (23) |
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LOFAR opens up the low-frequency universe - and starts a new SETI search
(PhysOrg.com) -- The Low Frequency Array (LOFAR), a new pan-European radio astronomy facility, has started mapping the Universe at very low energy wavelengths, a part of the electromagnetic spectrum that is ...
Apr 14, 2010 |
4.9 / 5 (8) |
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Fiber-wireless (Fi-Wi) to provide ultra-high-speed, short-range communication
(PhysOrg.com) -- By looking at the latest electronic communication devices that have emerged over the past few years, it's clear that the trend of smaller, portable devices is strong and expected to continue. ...
Mar 09, 2010 |
4.4 / 5 (13) |
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Astronomers seek to explore the cosmic Dark Ages
No place seems safe from the prying eyes of inquisitive astronomers. They've traced the evolution of the universe back to the "Big Bang," the theoretical birth of the cosmos 13.7 billion years ago, but there's still a long ...
Oct 15, 2009 |
4.9 / 5 (10) |
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New instrument has potential to detect water deep underground on Mars (w/ Video)
(PhysOrg.com) -- With the whoosh of compressed gas and the whir of unspooling wire, a team of Boulder scientists and engineers tested a new instrument prototype that might be used to detect groundwater deep ...
Space & Earth / Space Exploration
Jun 24, 2009 |
4.3 / 5 (4) |
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Hubble to receive high-tech James Webb Space Telescope technology
Scientists and engineers now creating new technologies for NASA's James Webb Space Telescope, have realized they can be used to enhance the Hubble's Advanced Camera for Surveys (ACS) in the upcoming servicing ...
Space & Earth / Space Exploration
May 08, 2009 |
4.8 / 5 (11) |
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