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Device transmits radio waves with almost no power—without violating the laws of physics
A new ultra-low-power method of communication at first glance seems to violate the laws of physics. It is possible to wirelessly transmit information simply by opening and closing a switch that connects a resistor to an antenna. No need to send power to the antenna.... Read more
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A system to enable multi-kilometer and sub-terahertz communications at extremely high frequency bands
After the introduction of the fifth-generation technology standard for broadband cellular networks (5G), engineers worldwide are now working on systems that could further speed up communications. The next-generation wireless communication networks, from 6G onward, will require technologies that enable communications at sub-terahertz and terahertz frequency bands (i.e., from 100GHz to... Read more
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Using cosmic rays to generate and distribute random numbers and boost security for local devices and networks
State-of-the-art methods of information security are likely to be compromised by emerging technologies such as quantum computers. One of the reasons they are vulnerable is that both encrypted messages and the keys to decrypt them must be sent from sender to receiver.... Read more
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Integrated photonic circuits could help close the 'terahertz gap'
EPFL researchers have collaborated with colleagues at Harvard and ETH Zurich on a new thin-film circuit that, when connected to a laser beam, produces finely tailorable terahertz-frequency waves. The device opens up a world of potential applications in optics and telecommunications.... Read more
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A new terahertz wireless link could bridge the digital divide, says researcher
For years, the idea of 6G was thought to be science fiction. Now, it's closer than ever before, but Josep Jornet, an associate professor of electrical and computer engineering at Northeastern, says there's still room for improvement.... Read more
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New and improved multi-band operational receiver for 5G radio communication
An ultra-wide-band receiver based on a harmonic selection technique to improve the operational bandwidth of 5G networks has been developed by Tokyo Tech researchers in a new study. Fifth generation (5G) mobile networks are now being used worldwide with frequencies of over 100 Hz. To keep up with the data... Read more
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Signal processing algorithms improve turbulence in free-space optic tests
New signal-processing algorithms have been shown to mitigate the impact of turbulence in free-space optical experiments, potentially bringing "free space" internet a step closer to reality.... Read more
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Communications system achieves fastest laser link from space yet
In May 2022, the TeraByte InfraRed Delivery (TBIRD) payload onboard a small CubeSat satellite was launched into orbit 300 miles above Earth's surface. Since then, TBIRD has delivered terabytes of data at record-breaking rates of up to 100 gigabits per second—100 times faster than the fastest internet speeds in most... Read more
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A space-time coding metasurface antenna for efficient and secure communications
Antennas that can couple guided waves emitted from different sources in free space and manipulate these waves are crucial to the development of numerous technologies, including wireless communication, optical communication and ranging systems. Metasurfaces, thin films made up of several elements, have shown promise for developing these types of antennas.... Read more
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Collaboration achieves record level of radio frequency signal synthesis with quantum-based accuracy
NIST, in collaboration with CU Boulder faculty, published a paper titled: "RF Josephson Arbitrary Waveform Synthesizer with Integrated Superconducting Diplexers" demonstrating results that show a significant step toward a broadband, integrated, quantum-based microwave voltage source with useful power above -30 dBm.... Read more
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Researchers discover security loophole allowing attackers to use Wi-Fi to see through walls
A research team based out of the University of Waterloo has developed a drone-powered device that can use Wi-Fi networks to see through walls.... Read more
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Sending 1.84 petabits of data per second via a fiber-optic cable over a distance of 7.9 km
A team of researchers with members from several institutions in Denmark, Sweden and Japan has developed a means for sending 1.84 petabits of data per second via a fiber-optic cable over 7.9 km. Their report is published in Nature Photonics.... Read more
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Deep learning with light: Components of machine learning model encoded onto light waves
Ask a smart home device for the weather forecast, and it takes several seconds for the device to respond. One reason this latency occurs is because connected devices don't have enough memory or power to store and run the enormous machine-learning models needed for the device to understand what a... Read more
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Researchers bring first underwater messaging app to smartphones
For millions of people who participate in activities such as snorkeling and scuba diving each year, hand signals are the only option for communicating safety and directional information underwater. While recreational divers may employ around 20 signals, professional divers' vocabulary can exceed 200 signals on topics ranging from oxygen level,... Read more
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New inexpensive Wi-Fi system improves fire detection
A Sydney Harbor Tunnel explosion showcases the work of UNSW researchers using wireless signals and artificial intelligence to more accurately identify dangerous fire situations.... Read more