RF Transmitter Powers Battery-Free IoT Sensors

Sept. 6, 2023
Energous' PowerBridge sends RF energy over the air and to power battery-less IoT sensors.

This video is part of the TechXchange: The Internet of Things.

Batteries are the bane of IoT sensors, but they're typically a requirement as conventional energy-harvesting solutions like solar panels are often impractical. One solution is to provide power wirelessly. A power transmitter can typically energize multiple devices within its range. Though the amount of power tends to be small, it's usually sufficient for the sensors to operate as well as drive limited wireless communication to deliver information from the sensor. 

Energous' PowerBridge is designed to send RF energy over the air and to devices with matching chips from the company that can store the energy for use by the device. Kero Basilios, Energous' Director of Application Engineering and Customer Support, shows the system in action (watch the video above). You can also watch Leveraging Wireless Power, which looks at InnoTractor's use of Energous' power technology to support an asset-tracking system that doesn't use batteries for its mobile IoT devices. 

Energous sells the chips and devices to handle the wireless power exchange. The PowerBridge series is a packaged example of the transmit side (Fig. 1). It can send power to dozens of devices. And it doesn't just broadcast power like a conventional radio, but rather targets the individual devices for more efficient power transmission. 

The transmitter needs to be paired with one or more devices like Wiliot's Pixel (Fig. 2). The Pixel is essentially an RF identification tag that's powered by Energous' wireless power transmission scheme. This provides more power and more range than a conventional RFID tag, and it enables the device to power more sensor support. 

Wireless power is coming of age. It will never supply an unlimited amount of power, but it will deliver more than enough to address a wide range of applications, primarily IoT-based sensors and displays. It could be paired with lower-power application displays such as those used in eBook readers. 

See more videos and read more articles in the TechXchange: The Internet of Things.

Links

About the Author

William G. Wong | Senior Content Director

I am Editor of Electronic Design focusing on embedded, software, and systems. As Senior Content Director, I also manage Microwaves & RF and I work with a great team of editors to provide engineers, programmers, developers and technical managers with interesting and useful articles and videos on a regular basis. Check out our free newsletters to see the latest content.>

You can send press releases for new products for possible coverage on the website. I am also interested in receiving contributed articles for publishing on our website. Use our template and send to me along with a signed release form. 

Check out my blog, AltEmbedded on Electronic Design, as well as his latest articles on this site that are listed below. 

You can my social media via these links:

I earned a Bachelor of Electrical Engineering at the Georgia Institute of Technology and a Masters in Computer Science from Rutgers University. I still do a bit of programming using everything from C and C++ to Rust and Ada/SPARK. I do a bit of PHP programming for Drupal websites. I have posted a few Drupal modules.  

I still get a hand on software and electronic hardware. Some of this can be found on our Kit Close-Up video series. You can also see me on many of our TechXchange Talk videos. I am interested in a range of projects from robotics to artificial intelligence. 

Sponsored Recommendations

April 24, 2025
This educational note dives into the development of dynamic EMC test systems, their inherent challenges, and how Rohde & Schwarz and AVL, one of the world’s leading mobility technology...
April 24, 2025
The R&S®RadEsT radar essential tester is a game changer in automotive radar sensor testing, enabling manufacturers to rapidly qualify radar sensors with high accuracy while dramatically...
April 24, 2025
Discover the components and structure of automotive electronic systems and how innovative test products and systems from Rohde & Schwarz address the entire vehicle.
April 24, 2025
Learn about two solutions to automate testing against the Chinese national GNSS test standard with R&S CMW run sequencer software and a vector network analyzer.