| Radiocommunication (197) |  |
may be a relatively straightforward radio wave-based transmission technology. But as we devise more and more ways to benefit from ever greater connectivity between the people, other living organisms, objects and our environments,
But what if sensors could harness energy directly from their environment from the sun, from ambient heat, from radio waves or vibrations?
vibrations and radio waves The SWAP team are studying, testing and deploying novel technologies that enable sensors to use solar
and thermal energy as well as radio waves and vibrations to power themselves. They are focusing on making energy harvesters more efficient
and execute medical commands and report the completed activity via a tiny built-in radio antenna.""We think this will enable researchers to develop a new generation of tiny implants designed for a wide array of medical applications"says Amin Arbabian assistant professor of electrical engineering at Stanford university.
Finally the"smart chip"contains a radio antenna to beam back sensor readings or signal the completion of its therapeutic task.
then transmit the data wirelessly using radio frequency waves. o one has ever put electronics inside the lens of the eye,
researchers built a prototype that uses radio frequency for wireless power and data transfer. A thin, circular antenna spans the perimeter of the deviceoughly tracing a person irisnd harnesses enough energy from the surrounding field to power a small pressure sensor chip.
A much smaller more efficient radio wave circulator has the potential to double the useful bandwidth in wireless communications by enabling full-duplex functionality#meaning devices can transmit
The researchers device works by mimicking the way magnetic materials break the symmetry in wave transmission between two points in space a critical function that allows magnetic circulators to selectively route radio waves.
#Double twist radio waves send data faster In the past, scientists have twisted light to send data super fast,
but new research shows that a similar technique with radio waves can also reach high speeds.
it is also one of the fastest data transmission via radio waves that has been demonstrated, says study leader Alan Willner, electrical engineering professor at the USC Viterbi School of engineering.
the team took a page from Willner previous work and twisted radio beams together. They passed each beamhich carried its own independent stream of datahrough a piral phase platethat twisted each radio beam into a unique and orthogonal DNA-like helical shape.
A receiver at the other end of the room then untwisted and recovered the different data streams. his technology could have very important applications in ultra-high-speed links for the wireless ackhaulthat connects base stations of next-generation cellular systems,
The purpose of the ALMA Observatory is to search for cosmic origins through an array of 66 sensitive radio antennas from the high elevation and dry air of northern Chile s Atacama desert.
The radiation extends across the entire electromagnetic spectrum from radio waves and visible light to X-rays and gamma rays.
Arbabian has used these prototypes to prove that the devices work they can receive signals harvest energy from incoming radio signals
A number of battery-free technologies exist that are powered by solar and ambient radio frequency waves.
and radio waves can t always penetrate such as inside walls or bridges and below ground where there might be at least small temperature fluctuations.
#Wi-fi backscatter could make Internet of things real A new method uses radio frequency signals as a power source
The Rice university lab of chemist James Tour in collaboration with Lockheed martin developed the compound to protect marine and airborne radars with a robust coating that is also transparent to radio frequencies.
and metallic elements must be installed far from the source of radio signals to keep from interfering. t s very hard to deice these alumina domestour says. t takes a lot of power to heat them
because they re very poor conductors. nter graphene the single-atom-thick sheet of carbon that both conducts electricity and because it s so thin allows radio frequencies to pass unhindered.
Further experiments found them to be nearly invisible to radio frequencies. Tour says the availability of nanoribbons is no longer an issue
When radio waves hit the mailbox and bounce back to your radar detector you detect the mailbox.
and this layer radiates back a field that cancels the reflections from the object. heir experimental demonstration effectively cloaked a metal cylinder from radio waves using one layer of loop antennas.
And though their tests showed the cloaking system works with radio waves retuning it to work with Terahertz (T-rays)
#Engineers create smallest FM radio transmitter Columbia University rightoriginal Studyposted by Holly Evarts-Columbia on November 20 2013to build the world s smallest system that can create FM signals
And it s an important first step in advancing wireless signal processing and designing ultrathin efficient cell phones. ur devices are much smaller than any other sources of radio signals
While graphene NEMS will not be used to replace conventional radio transmitters they have many applications in wireless signal processing. ue to the continuous shrinking of electrical circuits known as Moore s Law today s cell phones have more computing
Land-based wireless networks rely on radio waves that transmit data via satellites and antennae. Unfortunately radio waves work poorly underwaterâ
##which is why agencies like the Navy and National oceanic and atmospheric administration use sound wave-based techniques to communicate underwater.
The buoys convert the acoustic waves into radio waves to send the data to a satellite which then redirects the radio waves back to land-based computers.
In the past several years optical-based oscillatorsâ##which require optical reference cavitiesâ##have become better than electronic oscillators at delivering stable microwave and radio frequencies.
Another system, developed at the UK's National Physical Laboratory, uses radio frequencies, microwaves, terahertz radiation and far-infrared light to determine the ripeness of strawberries
#RF Safe-Stop can shut down a vehicle s engine by blasting radio waves Will high-speed car chases become a thing of the past?
##E2v s#RF Safe-Stop#can stall the engine of a vehicle by confusing its electronic systems with radio frequency.
##But the maximum radio frequency intensity of the transmission##is only one-fourth that of sunlight,##according to former NASA wireless power transmission engineer Richard Dickinson.
#Battery-free Wifi devices that run on radio waves What if devices could pull enough power wirelessly from the air to run themselves
Not so#according to a group of University of Washington engineers#who are building a communication system called Wifi backscatterthe system powers devices using radio waves
then knock them off-balance with a radio wave. The small radio-frequency signals given off by the recovering nuclei provide the imaging data.
and the built-in radio beams this info to the receiver placed within a few meters. From this point the original thought command becomes available as a control signal for computers.
At the University of Virginia, researchers have unveiled a new way to transmit wireless data in light waves from LED LIGHTS a much more reliable and faster alternative to radio wave Wi-fi. DNEWS:
and broadcast a ham radio signal for amateurs to tune in to o
#Spacecraft seek geysers without human help When the Rosetta spacecraft sends its lander to the surface of a comet on 12 november the lander will follow prearranged orders from Earth to touch down safely
Additional radio signals cause the protons in your body's liquids to resonate with the magnetic field
To shrink down TRASE uses a novel radio wave timing technique that requires much smaller magnets.
In a single degenerate system the shock wave from the white dwarf explosion should smash into the surrounding gas from the companion star generating radio waves.
Pérez-Torres and colleagues saw no radio waves so concluded SN 2014j probably began as two white dwarfs.
Spacecraft currently use radio waves to beam information back home. Laser signals carry more data but the light is almost undetectable
Spacecraft normally rely on radio waves to communicate. These can be detected rain or shine but their relatively long wavelengths limit the information they can transmit in a given time period.
or impossible using only radio frequencies he says. But using shorter wavelengths for communication presents new challenges.
Laser beams do not spread out as much as radio waves while they travel which means that they must be aimed very precisely at detectors on the ground.
as radio waves take a quarter of a second to make the round trip up to a geosynchronous satellite and back.
This plans to put 648 satellites in orbit about 1200 kilometres above Earth's surface, where the round trip time for radio waves is just a few thousands of a second, fine for any online application.
If they're using radio waves, those beams will have areas of overlap and interference.""Beaming down Radio transmission is the most common way to communicate between satellites and Earth.
working with radio waves is finicky. So Cahoy and colleagues are working on using light to transfer data instead.
The primary culprit in smartphone battery drain is an inefficient power amplifier a component that is designed to push the radio signal out through the phones antennas.
A paper detailing the technology was presented at that year s IEEE Radio frequency Integrated circuits Symposium. That Deshpande Center grant was big in terms of the funding
or a radio antenna tuning into a single station out of hundreds.##The concept took shape in early 2000s
Long-term MRIMRI uses magnetic fields and radio waves that interact with protons in the body to produce detailed images of the body s interior.
In the recent past a team of Princeton professors including Mcalpine created a bionic ear out of living cells with an embedded antenna that could receive radio signals.
Team refines deicing film that allows radio frequencies to pass Rice university scientists who created a deicing film for radar domes have refined now the technology to work as a transparent coating for glass.
and fog while retaining their transparency to radio frequencies (RF). The technology was introduced this month in the American Chemical Society journal Applied materials and Interfaces.
when exposed to high-powered radio signals. At extremely high RF the thicker portions were absorbing the signal he said.
and ice but also be transparent to radio frequencies. It's really frustrating these days to find yourself in a building where your cellphone doesn't work.
Radio waves of certain frequencies can travel through ice but bounce off the bedrock beneath. So researchers sent down pulses of radio energy of this particular frequency.
M-class flares can cause some space weather effects On earth like disrupting radio signals. Anything more intense than an M9. 9 flare becomes an X-class the highest category.
which is like radar except instead of bouncing back radio waves it uses lasers. LIDAR systems existed before Cyark
You can test this out by purchasing several RC cars tuned to the same radio frequency.
For traditional radio frequency helicopters in same frequency cannot fly together because of interference. With 2. 4ghz radio system many helicopters can fly at the same time without interference.
Germany and Canada have built a miniature particle accelerator that uses terahertz radiation instead of radio waves to create pulses of high-energy electrons.
and some physicists are keen on using the radiation in much the same way that radio waves
Itron adaptive technology automatically routes data over the best communications system--radio frequency or power line carrier--at the time for the data and the requirements of the application.
By taking a more camera-like approach to radio frequency imaging, essentially treating microwaves like waves of light
These machines accelerate charged particles using either a pulse of radio frequency radiation or a wakefield (using high energy unchesof electrons to blast a tunnel through plasma;
and the audience as the Wild Card choice from Startup Alley launched a device that converts radio frequencies into DC power,
"The radome which is radio frequency transparent was not available in the country, "said P Vijaya Saradhi, group director, management system area.
"The radome which is radio frequency transparent was not available in the country, "said P Vijaya Saradhi, group director, management system area.
"Instead of optically based sensing, the shape-changing probes are designed to operate in the radio frequency (RF) spectrum,
Unlike conventional radio frequency systems that require complex signal processing, VLC uses energy efficient light emitting diodes to transmit data inexpensively, securely, cleanly and with virtually unlimited bandwidth.
Compared to existing methods that use wireless radio signals such as Wi-fi to track user gestures, light-based sensing does not introduce electromagnetic interferences
however these radio signals do not easily pass through the human body and therefore require a power boost to help overcome this signal obstruction, or"path loss."
The technology involves harvesting radio frequency energy from existing wireless and broadcast networks, from 4g to digital television.
Lord Drayson first showed how much radio frequency energy was in the room, and then used his Freevolt system to power a loudspeaker.
it has an entire online-radio station with shows by stars like Josh Homme and Elton john. Getty Images Europeapple hired BBC Radio 1 DJ Zane Lowe to present its own online-radio station.
Spotify has also been moving forward and developing new ways to bring in customers. It has launched playlists designed to surface up-and-coming music,
The technology would let the government track radio signals used to operate drones within a 5-mile radius
A Youtube video is opened in the background featuring a song used in a fictional radio station in the game Grand Theft Auto V.'We believe that the crypto ransomware uses social engineering techniques as a means of infecting victims'
protecting whatever is inside from static, electromagnetic pulses, radio waves, and other electromagnetic phenomenon. The material comes amid growing concern over the development of electromagnetic weapons that could knock out computers.
which beams a 5. 8 GHZ radio frequency that wireless devices convert into DC power, and may debut in early 2016 in devices developed by SK Telesys (a Korean rival of Samsung)
the UCSD cloak works by manipulating electromagnetic waves, such as visible light or radio waves. Because it can scatter these waves,
About 90%of your phone power is spent pumping out radio waves just trying to keep its wireless connection even
The case arveststhose stray radio waves and converts them into electric power. The Harvest case is able to stretch your battery life by nearly a third.
Nikola Labswill Zell explains in the video below how the phone case is able to turn radio waves into electricity.
Rather than melting drones in midair like Boeing's new Compact Laser weapons System, AUDS shoots the flying vehicles with something that doesn't destroy them radio waves.
and direct, the aerial bots using radio signals. Enter AUDS, which uses a drone's communication system against it.
AUDS sends the unmanned aerial vehicle (UAV) radio signals that interfere with the radio signals coming from the remote operator.
#Nanotechnology may double radio frequency data capacity A team of Columbia Engineering researchers has invented a technology--full-duplex radio integrated circuits (ICS)--that can be implemented in nanoscale CMOS to enable simultaneous transmission and reception
and there is no space left at radio frequencies for future expansion. At the same time, the grand challenge of the next-generation 5g network is to increase the data capacity by 1, 000 times.
It's a bit like selecting which radio station we tune to, by turning a simple knob.
when the intensity of light and radio waves completely disappears. These findings are of fundamental importance for the development of quantum physics
representing the quantum ground state of light and radio waves. However, until now direct experimental proof of this basic phenomenon has been considered impossible.
"While the transistors used in radio frequency (RF) circuits can be made flexible and stretchable using several techniques already demonstrated, the main component of the communication circuit,
Whereas Bluetooth devices worn on the body transmit data via radio signals, the electromagnetic radiation that makes up these signals is blocked by something you.
whether in a communications tower or a mobile phone, is to launch energy into free space in the form of electromagnetic or radio waves,
However, this theory becomes problematic when dealing with radio wave emission from a dielectric solid, a material
meaning that the velocity of the radio wave decreases as it enters the medium, "said Dr Dhiraj Sinha, the paper's lead author."
It's a bit like selecting which radio station we tune to, by turning a simple knob.
however these radio signals do not easily pass through the human body and therefore require a power boost to help overcome this signal obstruction, or"path loss."
#Physicists shrink particle accelerator An interdisciplinary team of researchers has built the first prototype of a miniature particle accelerator that uses terahertz radiation instead of radio frequency structures.
Particle accelerators usually rely on electromagnetic radiation from the radio frequency range; DESY's particle accelerator PETRA III, for example, uses a frequency of around 500 megahertz.
which uses a magnetic field and radio waves to produce images and combined it with a special chemical contrast solution.
In a new paper they describe a sensor that sends radio signals through a wall and can identify people.
The system works by sending a radio signal that will bounce off a person and back to the device.
In a new paper out of MIT Computer science and Artificial intelligence Lab, the researchers describe a sensor that sends radio signals through a wall
The system works by sending a radio signal that will bounce off a person and back to the device.
#Sensor invented that uses radio waves to detect subtle changes in pressure Stanford engineers have invented a wireless pressure sensor that has already been used to measure brain pressure in lab mice with brain injuries.
The copper strips act like radio antennas. The rubber serves as an insulator. The technology involves beaming radio waves through this simple antenna-and-rubber sandwich.
When the device comes under pressure the copper antennas squeeze the rubber insulator and move infinitesimally closer together.
Radio waves passing through the two antennas slow down in terms of frequency. When pressure is relaxed the copper antennas move apart
The engineers proved that this effect was measurable giving them a way to gauge the pressure exerted on the device by tracking the frequency of radio waves passing through the device.
In experiments on laboratory mice Tse used radio waves to probe Bao's wireless sensor allowing him to monitor changes in intracranial pressure continuously.
By putting this pyramid-shaped rubber layer between the copper antennas this team of engineers was able to exploit the subtle interactions of radio waves
"The sensor is connected to a modem using radio frequency systems. The processed information from the elder's movement pattern may include factors such as temperature, heart rate and deviations in the usual activity path,
and fog while retaining their transparency to radio frequencies (RF). The technology was introduced this month in the American Chemical Society journal Applied materials and Interfaces.
when exposed to high-powered radio signals.""At extremely high RF, the thicker portions were absorbing the signal,
but also be transparent to radio frequencies. It's really frustrating these days to find yourself in a building where your cellphone doesn't work.
These report blood glucose levels every 5 minutes, thanks to a small radio transmitter attached to a fine sensor wire that runs under the skin (the wire is replaced weekly, the transmitter every six months.
but the company has assembled already a 20-person team of experts in radio frequency technology and distributed networks.
and other battery-enabled devices on the go using something that is already abundantly flowing all around us radio waves.
Nikola Labs presented at Techcrunch Disrupt a couple years back with the same idea turning radio frequency signals into battery power.
while millimeter wave radio signals are absorbed by rain. Routing data over both simultaneously provides redundancy that allows an AOPTIX link to guarantee a rate of two gigabits per second with only five minutes or less downtime in a year,
A typical fiber connection might be 10 or more times faster than that, due to the limitations of the radio frequency link.
Engineers have worked for decades on ways to generate power by harvesting radio signals from the air, a ubiquitous resource thanks to radio, TV
Harvesting ambient radio waves can collect on the order of tens of microwatts of power. But sending data over Wi-fi requires at least tens of thousands of times more powerundreds of milliwatts at best
Their devices send messages by scattering signals from other sourceshey recycle existing radio waves instead of expending energy to generate their own.
These satellites orbit at 35000 kilometers often adding a 600 millisecond delay to the radio signals going back and forth.
Energous charging method uses a transmitter with lots of small antennas to send radio waves to a receiver connected to the gadget being charged.
the transmitter directs radio waves toward the receiver, which collects them and converts their energy to DC power so it can charge the phone.
The armor-incased antennas also have jamming capability to block radio signals such as those used to remotely trigger explosives,
However, today devices use twice as much of the radio spectrum as is necessary. New technology is being developed that could fundamentally change radio design
which combines electrical balance isolation and active radio frequency cancellation. Their prototype can suppress interference by a factor of over 100 million and uses low-cost
Since the radio spectrum is limited a resource, and with network operators paying billions of pounds to access the spectrum,
which via radio frequency sends"monitoring or results"to the doctor or specialist. He adds that as innovation is noninvasive,
the need for radio spectrum grows with it. Cognitive radio technology developed under the EU-funded QOSMOS project could help meet these needs
a need for more radio spectrum, an ever-increasing demand for data, and consumersincreasing unwillingness to pay for it.
The QOSMOS project addressed the twin problems of scarcity and cost by developing cognitive radio technology that dynamically optimises the use of radio spectrum,
Israeli security researchers have demonstrated how to capture radio emissions given off by laptops that inadvertently leak data about the keys.
Before now, grabbing the radio signals was thought to require expensive, bulky equipment. But the four-strong team managed it with cheap components small enough to conceal inside a piece of pocket bread.'
monitors the radio signals given off by laptops when their central processing unit is crunching data. The team discovered that many different operations in a computer,
this can also include radio waves, lasers and even sound waves. The microwave gun is evidence of plans by Russia to modernise its armed forces,
the lock incorporates the most advanced fingerprint sensor from sweden. it utilizes a radio frequency signal to scan the pattern under the surface of the skin to guarantee its authenticity. the body is has no keyholes to deny any idea of lock picking,
or by registering their fingerprints. the ola fingerprint lock currently looking for funding on its kickstarter campaign with a march 2016 shipping date. the companion app for ola the sensor uses radio frequency signal to scan the pattern under the surface of the skin schematics of the ola fingerprint lock n
A likely application says Johan Liu is the integration of graphene-based film into LEDS, lasers and radio frequency components for cooling purposes. s
A likely application says Johan Liu is the integration of graphene-based film into LEDS, lasers and radio frequency components for cooling purposes n
such as highly efficient Light Emitting Diode lasers and radio frequency components for cooling purposes, Liu said. raphene-based film could also pave the way for faster,
Like radio transmitters and receivers, brain cells send and receive transmissions in fine-tuned ways that separate the signals from the noise.
Radar, which detects objects in motion through high frequency radio waves, enables what Project Soli design lead Carste Schwesig calls a undamentally different approachto motion tracking. typical model of the way you think about radar is like a police radar
such as highly efficient Light Emitting Diodes (LEDS), lasers and radio frequency components for cooling purposes. Graphene-based film could also pave the way for faster, smaller, more energy efficient, sustainable high power electronics."
using radio waves. Li-Fi could be more than 10 times faster than current Wi-fi and white laser Li-Fi could be 10 to 100 times faster than LED based Li-Fi currently still under development. he concept of white lasers first seems counterintuitive
2015new technology may double radio frequency data capacity: Columbia engineers invent nanoscale IC that enables simultaneous transmission and reception at the same frequency in a wireless radio March 14th,
#New technology may double radio frequency data capacity: Columbia engineers invent nanoscale IC that enables simultaneous transmission
and there is no space left at radio frequencies for future expansion. At the same time, the grand challenge of the next-generation 5g network is to increase the data capacity by 1, 000 times.
such as highly efficient Light Emitting Diodes (LEDS), lasers and radio frequency components for cooling purposes. Graphene-based film could also pave the way for faster, smaller, more energy efficient, sustainable high power electronics."
#Scientists print low cost radio frequency antenna with graphene ink (Nanowerk News) Scientists have moved graphene--the incredibly strong and conductive single-atom-thick sheet of carbon--a significant step along the path
Researchers from the University of Manchester, together with BGT Materials Limited, a graphene manufacturer in the United kingdom, have printed a radio frequency antenna using compressed graphene ink.
from AIP Publishing("Binder-free highly conductive graphene laminate for low cost printed radio frequency applications")."These scanning electron microscope images show the graphene ink after it was deposited
/University of Manchester) The study demonstrates that printable graphene is now ready for commercial use in low-cost radio frequency applications,
which enabled efficient radio frequency radiation, was one of the most exciting aspects of the experiment,
and 3. 5 millimeter across and radiated radio frequency power effectively, said Xianjun Huang, who is the first author of the paper and a Phd candidate in the Microwave and Communcations Group in the School of Electrical and Electronic engineering.
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