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Microwave Energy Transmission Lab
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Building a future in which radio waves deliver electricity from space to the ground.
AboutAbout the lab
Delivering electricity by radio waves.
The Microwave Energy Transmission Lab (Shinohara Lab, Research Institute for Sustainable Humanosphere) focuses mainly on research on space solar power stations.
The lab also conducts research and development on wireless power transfer, which sends energy by microwave-band radio waves, and on applications of microwave heating.
Key terms
- Space solar power station
- A concept for a future power station that places solar cells in space and sends the electricity they generate to the ground by microwaves
- Rectenna
- A device that receives microwaves and converts them into DC electricity
- Magnetron
- A vacuum tube used to generate microwaves in microwave ovens and similar devices
NewsLab news
A master's student received the IEEE MTT-S Kansai Chapter Best Poster Award
A master's student received the 2025 Asian Wireless Power Transfer Workshop Best Student Award
ResearchResearch themes
The lab studies space solar power stations, microwave energy transmission, and applications of microwave heating. It covers every step, from design with circuit simulators to circuit fabrication and measurement experiments.
*Illustrative imageSpace solar power station
The lab studies the concept of a future power station that places solar cells in space and sends electricity to the ground by microwaves. It is attracting attention as a new baseload energy source that improves the stability and capacity factor of solar power generation.
*Illustrative imageSending power by microwaves
The lab conducts research and development on high-efficiency, low-cost power transmission systems using magnetrons, on compact, high-performance power transmission systems using semiconductor devices, and on rectennas, which receive microwaves and convert them into electricity.
*Illustrative imageHeating with microwaves
Taking advantage of microwave heating, which heats quickly and evenly, the lab develops pretreatment equipment for producing bioethanol from woody biomass and studies the synthesis of high-performance materials by microwave irradiation.
MembersFaculty
The lab's faculty members are Professor Naoki Shinohara and Associate Professor Tomohiko Mitani.
- ProfessorNaoki Shinohara
- Associate ProfessorTomohiko Mitani
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Solar power satellite sandwich or abascus concept” NASA / Public domain (cropped)
- Space solar power station: “One of five THEMIS satellites undergoes a solar array test” NASA/Jack Pfaller / Public domain (cropped)
- Sending power by microwaves: “Magnetron detail” Schrauber5 / CC BY-SA 4.0 (cropped)
- Heating with microwaves: “Pile of wood chips Namibia” Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) - Bush Control and Biomass Utilisation Project / CC BY-SA 4.0 (cropped)
- Related lab (Space Radio Engineering Lab / (Research Institute for Sustainable Humanosphere) Space Electromagnetic Environment Exploration Lab): “Arase ISAS” 宇宙科学研究所(ISAS) / CC BY 4.0 (cropped)
- Related lab (Plasma Energy Conversion Lab / Plasma Energy Research, Division of Energy Generation): “Plasma globe 60th” Colin / CC BY-SA 3.0 (cropped)
- Related lab (Semiconductor Physics and Engineering Lab): “Rounded Silicon Carbide Ingot” LaMèreVeille / CC BY-SA 4.0 (cropped)
- Related lab (Electromagnetic Energy Engineering Lab): “Cut-away version of an electric motor (1)” S.J. de Waard / CC BY 2.5 (cropped)
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