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Li Lab
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A lab studying next-generation wireless communication and the effects of radio waves on the human body.
AboutAbout the lab
Combining ultra-high-speed wireless communication with safe use of radio waves.
The Li Lab studies foundational technologies for next-generation wireless communication and the safety of human exposure to radio waves.
Its main themes are evaluating the antennas of wireless terminals such as mobile phones, evaluating the effects of radio waves on the human body, and understanding the wireless environment inside tunnels.
The lab aims to achieve both ultra-high-speed, highly reliable communication and safe use of radio waves.
The lab belongs to the Advanced Wireless & Communication Research Center and was established in April 2023.
Key terms
- MIMO-OTA measurement
- A measurement method that evaluates a wireless terminal with multiple antennas while it is actually exchanging radio waves.
- Fading emulator
- A device that places virtual scatterers around a terminal to artificially recreate conditions in which radio waves are reflected and distorted.
- Millimeter waves
- Radio waves with high frequency and short wavelength. They are planned to be introduced in mobile phones and other devices.
- Wireless electronic detonator
- A detonator, among those used in tunnel blasting, that is controlled wirelessly.
NewsLab news
A paper on modeling focused millimeter-wave exposure of rat skin has been accepted to IEEE Trans. EMC
A paper on dose estimation for 60 GHz millimeter-wave exposure has been accepted to IEICE Transactions C
A paper comparing local exposure of human face models has been accepted to Physics in Medicine and Biology
A paper on model differences in evaluating human radio-wave exposure has been accepted to IEEE Journal of Microwaves
ResearchResearch themes
Toward a next-generation wireless IoT society, ultra-high-speed, highly reliable, high-capacity wireless communication is needed. The lab investigates its foundational technologies while also verifying the safety of radio waves for the human body, aiming to achieve both communication and safe use of radio waves.
*Illustrative imageMIMO-OTA measurement technology
The lab studies techniques for evaluating MIMO array antennas, which will be built into next-generation wireless terminals such as mobile phones, while the terminals are actually exchanging radio waves. It developed a fading emulator jointly with the University of Toyama and proposes measurement techniques for wearable devices and in-vehicle antennas.
*Illustrative imageMillimeter-wave exposure and human safety
The lab investigates what biological effects exposure to millimeter-wave radio waves has on skin tissue. The aim is to obtain findings that could serve as a basis for international guidelines on the safety of radio-wave exposure, in a joint research project led by Hokkaido University.
*Illustrative imageWireless communication for unmanned tunnel blasting
Toward labor-saving and unmanned tunnel blasting, the lab works to improve the reliability of systems that use wireless electronic detonators. It aims to establish techniques for understanding how radio waves propagate and what the wireless environment is like, thereby contributing to the reliability of the whole system. In this joint research, the Li Lab serves as the lead.
MembersFaculty
The Li Lab's members consist of faculty, postdoctoral researchers, doctoral, master's, and undergraduate students, and short-term visitors.As of 2026
- Associate ProfessorKun Li
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: “RF Fully Anechoic Room 1” Mihaelawojcik / CC BY 4.0 (cropped)
- MIMO-OTA measurement technology: “Radio-frequency-anechoic-chamber-HDR-0a” Adamantios / CC BY-SA 3.0 (cropped)
- Millimeter-wave exposure and human safety: “Ait safety demo” Transportation Security Administration / Public domain (cropped)
- Wireless communication for unmanned tunnel blasting: “Bramhope Tunnel south portal” Tom Blackwell / CC BY-SA 2.0 (cropped)
- Related lab (Muramatsu Lab): “Body Area Network” Jtel / Public domain (cropped)
- Related lab (Murakami Lab): “Z Antennas at UHF Frequencies” C. Holloway/NIST / Public domain (cropped)
- Related lab (Ando Lab): “FDTD TFSF (English)” User:Dominator9000 / CC BY-SA 4.0 (cropped)
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