Researchers in Japan are using microwaves to power free-flying drones, a project that could possibly pave the way for a new type of rocket.
Currently, most rockets generate thrust by using controlled explosions of a solid or liquid fuel source, which can make up 90% of their total weight. However, new research published in the Journal of Spacecraft and Rockets demonstrates the potential of using an alternative source of fuel: microwaves.
Microwaves are a type of electromagnetic radiation. As such, they're jam-packed with energy that can be converted into electricity, much as sunlight can be converted to power by solar panels. In the new study, researchers generated electricity to fuel free-flying drones by beaming microwaves directly at them.
"In drone experiments, microwave power is sent from the antenna on the ground to the antenna on the drone. A rectifier is used to convert RF [radio frequency] to DC [direct current], and the DC power is used to drive the drone's motors. We call it "rectenna" (rectifier + antenna)," one of the new study's authors, Kohei Shimamura of the University of Tsukuba, told Space.com in an email.
Continue reading: https://www.space.com/microwave-powered-rockets-drone-project
Currently, most rockets generate thrust by using controlled explosions of a solid or liquid fuel source, which can make up 90% of their total weight. However, new research published in the Journal of Spacecraft and Rockets demonstrates the potential of using an alternative source of fuel: microwaves.
Microwaves are a type of electromagnetic radiation. As such, they're jam-packed with energy that can be converted into electricity, much as sunlight can be converted to power by solar panels. In the new study, researchers generated electricity to fuel free-flying drones by beaming microwaves directly at them.
"In drone experiments, microwave power is sent from the antenna on the ground to the antenna on the drone. A rectifier is used to convert RF [radio frequency] to DC [direct current], and the DC power is used to drive the drone's motors. We call it "rectenna" (rectifier + antenna)," one of the new study's authors, Kohei Shimamura of the University of Tsukuba, told Space.com in an email.
Continue reading: https://www.space.com/microwave-powered-rockets-drone-project
