Researchers from North Carolina State University have developed a system that can simultaneously deliver watts of power and transmit data at rates high enough to stream video over the same wireless connection. By integrating power and high-speed data, a true single “wireless” connection can be achieved.
“Recently wireless power as re-emerged as a technology to free us from the power cord,” says David Ricketts, an associate professor of electrical and computer engineering at NC State and senior author of a paper on the work. “One of the most popular applications is in wireless cell phone charging pads. As many know, these unfortunately often require almost physical contact with the pad, limiting the usefulness of a truly ‘wireless’ power source. Recent work by several researchers have extended wireless power to ‘mid-range’ which can supply power at inches to feet of separation. While encouraging, most of the wireless power systems have only focused on the power problem – not the data that needs to accompany any of our smart devices today. Addressing those data needs is what sets our work apart here.”
Wireless power transfer technologies use magnetic fields to transmit power through the air. To minimize the power lost in generating these magnetic fields, you need to use antennas that operate in a narrow bandwidth – particularly if the transmitter and receiver are inches or feet apart from each other.
Because using a narrow bandwidth antenna limits data transfer, devices incorporating wireless power transfer have normally also incorporated separate radios for data transmission. And having separate systems for data and power transmission increases the cost, weight and complexity of the relevant device.
The NC State team realized that while high-efficiency power transfer, especially at longer distances, does require very narrow band antennas, the system bandwidth can actually be much wider.
“People thought that efficient wireless power transfer requires the use of narrow bandwidth transmitters and receivers, and that this therefore limited data transfer,” Ricketts says. “We’ve shown that you can configure a wide-bandwidth system with narrow-bandwidth components, giving you the best of both worlds.”
With this wider bandwidth, the NC State team then envisioned the wireless power transfer link as a communication link, adapting data-rate enhancement techniques, such as channel equalization, to further improve data rate and data signal quality.
The researchers tested their system with and without data transfer. They found that when transferring almost 3 watts of power – more than enough to power your tablet during video playback – the system was only 2.3 percent less efficient when also transmitting 3.39 megabytes of data per second. At 2 watts of power, the difference in efficiency was only 1.3 percent. The tests were conducted with the transmitter and receiver 16 centimeters, or 6.3 inches, apart, demonstrating the ability of their system to operate in longer-distance wireless power links.
“Our system is comparable in power transfer efficiency to similar wireless power transfer devices, and shows that you can design a wireless power link system that retains almost all of its efficiency while streaming a movie on Netflix,” Ricketts says.
The Latest on: Wireless power
- Razer's Anzu Smart Glasses Are A Killer Work-From-Home Lifesaver With Wireless Audioon March 5, 2021 at 11:00 am
This is a bit of an odd product to come from Razer, considering the large names, such as Amazon, already in the market.
- AUKEY’s Latest Deals Include 25% Off Popular Power Strip Tower ($32)on March 5, 2021 at 4:50 am
AUKEY has a new round of deals on Amazon this week, with plenty of money to save on items like wireless earbuds, power strips, phone mounts, and more. There is a good list of deals to view below, with ...
- The best wireless travel keyboards for phones and tabletson March 5, 2021 at 12:00 am
If you want to type on your phone while you're out and about, a travel keyboard is a real boon. Here are some of the best wireless travel keyboards for 2021.
- Station power upgrade preparations continued with EVA-72on March 4, 2021 at 8:02 pm
Two astronauts aboard the International Space Station (ISS) conducted a spacewalk to continue the process of increasing the Station’s electrical power generation output. U.S. EVA-72 was conducted by ...
- Hurry, these stellar Bose wireless earbuds are on sale for their lowest price ever: 'Sound is incredible'on March 4, 2021 at 2:34 pm
Water-resistant and sweat-proof, they’re a perfect motivator to keep your exercise game on track all year long.
- Iggy Pop Unveils Marshall’s First-Ever True Wireless Earbudson March 4, 2021 at 7:00 am
Iggy Pop was drafted in to launch Marshall Headphones first-ever pair of true wireless earbuds. The new earbuds are tuned to the project the energy of the original Marshall guitar amps.
- You Can Save Up To 40% On RAVPower Chargers & Power Banks – Today Onlyon March 3, 2021 at 9:32 pm
In Amazon's Gold Box Deal of the Day today, you can save up to 40% off of select RAVPower chargers and power banks. Keep in mind that this price is good ...
- Global Low Power Wireless Networks Market Share 2021 CAGR Status, Analysis, Latest Trends, Industry Size, Revenue, Forecast to 2025on March 2, 2021 at 7:46 pm
Global “ Low Power Wireless Networks Market ”is analyzed byproduct types, applications, and key market players formarket size, share, sales (consumption), gross margin and revenue. The market experts ...
- HyperGear Quake Wireless Speaker with Built-in Power Bank is 25% Offon February 25, 2021 at 2:51 pm
Lounge has a special deal on the HyperGear Quake Wireless Speaker with Built-in Power Bank, which allows you to pump out the tunes and have a backup ...
- Latest AUKEY Deals Include $15 Wireless Earbuds, 10,000mAh Power Bank for $10on February 25, 2021 at 9:52 am
AUKEY has a new list of deals up on Amazon this week, with the highlight being a $15 pair of wireless earbuds. Seriously, considering how inexpensive these things are getting, I don’t ever want to ...
via Google News and Bing News