Energy & Green Tech
(Tech Xplore)—What would you say to a cell phone that works without a battery? A barest-bone keypad and LD light as quite unsnazzy components? If you cannot live without showy capabilities of smartphones then you might ...
Engineering
(Tech Xplore)—Future concepts from BAE Systems include a laser developed atmospheric lens. A video shows the concept and explains the thinking behind it.
Security
Sending a password or secret code over airborne radio waves like WiFi or Bluetooth means anyone can eavesdrop, making those transmissions vulnerable to hackers who can attempt to break the encrypted code.
Sep 27, 2016
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18
Security
Contactless card payments are fast and convenient, but convenience comes at a price: they are vulnerable to fraud. Some of these vulnerabilities are unique to contactless payment cards, and others are shared with the Chip ...
Aug 3, 2016
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12
Telecom
A team of 5G engineers from the Universities of Bristol and Lund has once again set a new world record for wireless spectrum efficiency, less than two months after setting the first one.
May 18, 2016
1
478
Engineering
What if computing could be lifted from the time and form constraints of batteries? What about a small battery free computer that works on radio waves?
Telecom
Last year, Columbia Engineering researchers were the first to invent a technology—full-duplex radio integrated circuits (ICs)—that can be implemented in nanoscale CMOS to enable simultaneous transmission and reception ...
Apr 15, 2016
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94
Engineering
IBM researcher Nils Rodday has given a presentation at this year's RSA Security Conference demonstrating how easy it is to hack an unknown brand of police drone. He reported that he discovered the technique while still a ...
Engineering
Mitsubishi Electric, in the business of selling electrical and electronic equipment used in industries ranging from satellite communications, to energy and building equipment, is interested in coming up with innovative ways ...
Radio is the transmission of signals by modulation of electromagnetic waves with frequencies below those of visible light. Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space. Information is carried by systematically changing (modulating) some property of the radiated waves, such as amplitude, frequency, or phase. When radio waves pass an electrical conductor, the oscillating fields induce an alternating current in the conductor. This can be detected and transformed into sound or other signals that carry information.
This text uses material from Wikipedia, licensed under CC BY-SA
