Make your own LEctenna like that used on the ISS to demo power-beaming

The Naval Research Lab (NRL) sent a simple device to the International Space Station (ISS) to demonstrate the reception of a Wi-FI signal and converting it to enough power to light up a LED: NRL power-beaming demonstrated on International Space Station – Naval Research Laboratory (NRL)

International Space Station astronaut Jessica Meir completed the first U.S. Naval Research Laboratory power-beaming demonstration [see video below] in orbit February 12, 2020, using relatively simple components suitable for STEM activities.

Meir showed how NRL’s LEctenna™, a light-emitting rectifying antenna, converted a wireless network signal, similar to home networks, into electric power. While the current generated and light emitted was a small amount, the setup proved the concept in space.

“While this is a cool device on its own, our collaborators [at NRL] have begun investigating the wide range of possible applications for this technology in the real world,” Meir said. “We could find ways to wirelessly charge our mobile devices or remotely power drones. But one of the most interesting applications that they’re looking into is space-based solar panel arrays.”

Led by electronics engineer Paul Jaffe, researchers at NRL are investigating space solar and power beaming as a potential source of clean energy for a variety of military and civilian applications.

Space solar is simply using solar panels in space to harvest the sun’s energy, where collecting rays would be unaffected by clouds or other interference. Power beaming would send the collected energy down to Earth, where it would be converted back – just like LEctenna™ did – to usable energy.

“Some people might know about power beaming, such as for their toothbrush, or putting their phones on a charging pad,” Jaffe said. “What’s really exciting about it though, is that power can be sent wirelessly over much larger distances.”

“NASA astronaut Jessica Meir demonstrates how the LEctenna™, a light-emitting rectifying antenna constructed by the U.S. Naval Research Laboratory, converts electromagnetic waves into electric current on the International Space Station. Similar technology could be used on the Earth’s surface to convert electromagnetic waves beamed from space-based solar arrays.” Credits NASA via NRL

The LEctenna™ demonstration proved the concept of power beaming in space, but was primarily a STEM project to inspire the next generation of innovators launched by the Department of Defense Space Test Program mission. Its simple, relatively low-cost design to convert electromagnetic waves to electric power can be replicated by students.

“LEctenna™ was a cool demonstration to raise awareness,” said Elias Wilcoski, an NRL research physicist. “We want to show students that this is technology that they can do themselves. If we can get them excited about it and space solar and power beaming, we can help bring more scientists and engineers into the fields to ensure the viability of our future.”

Here is a brief tutorial on making your own LEctenna:

Want to be able to see invisible electromagnetic waves? It’s easy to make your own LEctenna in just a few minutes to allow you to do just that! NRL’s Elias Wilcoski shows you how.

Parts used in this video:
An RF through-hole Schottky Diode (1N5711)
A through-hole LED
A plastic test tube