Radio frequency
hideRadio frequency (RF) is a frequency or rate of oscillation within the range of about 3 Hz to 300 GHz. This range corresponds to frequency of alternating current electrical signals used to produce and detect radio waves. Since most of this range is beyond the vibration rate that most mechanical systems can respond to, RF usually refers to oscillations in electrical circuits.
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News tagged with radio frequency
Intelligence inside metal components
Nov 24, 2009 |
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Up to now, extreme production temperatures made it impossible to equip metallic components with RFID chips during the operating process. At Euromold in Frankfurt (Dec. 2-5), Germany, Fraunhofer researchers ...
Microwave Meter Measures Moisture and Density of In-Shell Peanuts
Nov 20, 2009 |
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(PhysOrg.com) -- A microwave meter that instantaneously measures both moisture and density of in-shell peanuts has been developed by Agricultural Research Service (ARS) scientists, making it easier and faster ...
Building the smart home wirelessly
Nov 19, 2009 |
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Like the paperless office, the smart home has been a long time coming, but a report published in the International Journal of Internet Protocol Technology, suggests that radio tags coupled with mobile communications device ...
'Fingerprinting' RFID Tags: Researchers Develop Anti-Counterfeiting Technology
Nov 19, 2009 |
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(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 ...
Xerox Develops Silver Ink for Cheap Printable Electronics
Oct 27, 2009 |
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(PhysOrg.com) -- Xerox has developed an ink which can be used to print circuits onto plastics, films, and textiles. Although circuits printed on flexible materials aren't new, Xerox's method may be cheap and ...
WHO study suggests link between cell phones and tumors
Oct 27, 2009 |
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(PhysOrg.com) -- Preliminary results of an International investigation by the World Health Organization (WHO) suggest there may be a "significantly increased risk" of some types of brain tumors after use of ...
Physicists Turn to Radio Dial for Finer Atomic Matchmaking
Oct 20, 2009 |
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(PhysOrg.com) -- Investigating mysterious data in ultracold gases of rubidium atoms, scientists at the Joint Quantum Institute of the National Institute of Standards and Technology and the University of Maryland ...
Smallest nanoantennas for high-speed data networks
Oct 20, 2009 |
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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 ...
GTRI is developing protocols for testing effects of RFID systems on medical devices
Oct 06, 2009 |
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Radio frequency identification (RFID) systems are widely used for applications that include inventory management, package tracking, toll collection, passport identification and airport luggage security. More ...
Sony develops highly efficient wireless power transfer system based on magnetic resonance
Oct 02, 2009 |
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Sony Corp. today announced the development of a highly efficient wireless power transfer system that eliminates the use of power cables from electronic products such as television sets. Using this system, ...
Measuring the next successful antennas for in-body health monitoring devices
Sep 08, 2009 |
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Antennas for the latest implanted medical devices are being developed by Queen Mary University of London and tested through a unique piece of kit at the UK's National Physical Laboratory (NPL).
Smart food sensors could push down price of fruit 'n' veg
Chemistry / Analytical Chemistry
Sep 07, 2009 |
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The price of fresh food in shops and supermarkets could be reduced if innovative work at The University of Manchester to develop intelligent low-cost sensors is successful.
New Study Shows RFID Significantly Improves Item-Level Inventory Accuracy
Aug 27, 2009 |
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(PhysOrg.com) -- A new study on the use of radio-frequency identification tags on individual retail items shows that inventory accuracy decreases or diminishes over time with conventional systems that rely on barcodes and/or ...
'Printed chips' could be boon for consumers
Aug 12, 2009 |
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Until now, creating the microchips that power all of our electronic gadgets has been a laborious, complex and time-consuming process costing billions of dollars. But if a Milpitas, Calif.-based startup succeeds, making them ...
New LED lights have a bright future for communication
Aug 12, 2009 |
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Imagine a world where bright, energy sipping, cheap, durable LEDs light the world. A world where if you have enough light to see, you are connected.
