For the 6th generation mobile communication system (6G), expected to be implemented around 2030, the use of high-frequency bands such as millimeter and terahertz waves is being explored to enable high-speed, large-capacity communication. To take advantage of this unexplored frequency, I am researching innovative analog circuit architectures that can control wave phase, frequency, and amplitude at will.

I have been engaged in research on mixed-signal circuits, which serve as the bridge between analog and digital technologies, as well as ultra-high-frequency analog circuits. Since the launch of 5th generation mobile communication (5G) services in 2020, global research and development for the next-generation systems (Beyond 5G or 6G) is already underway. In this field, Japan leads in certain research areas, and I believe that this is one domain where Japan can and must excel in the future.

To enable high-speed, large-capacity communication, the use of high-frequency bands such as millimeter and terahertz waves is being explored. In high frequency bands, radio wave diffraction decreases, resulting in a smaller wireless cell radius and increased likelihood of link interruptions. In this research, I aim to develop “wave engineering” technology to manage waves more effectively by controlling the phase to form beams in targeted directions, switching to wavelengths with better propagation characteristics, and so on.

In the future, we aim to develop competitive circuit technologies for 6G, including beamforming technology that focuses radio wave energy in specific directions and advanced handover technology that rapidly monitors channel propagation environments. Furthermore, we will advance research on high-level functions such as beam tracking for high-speed moving objects.

This research has applications beyond 6G, including food analysis, lesion analysis, detection of dangerous objects, radar imaging, space resource exploration, weather forecasting, IoT communication with a trillion sensors, and wireless power supply. I would like to enrich our lives through the creation of new circuit technology and wave engineering using this technology.

Partnerships:
I would like to contribute to the development of industry by integrating various applications and uses with our collaborative partners and implementing unique and innovative technologies globally.

Research collaborations:
In terms of collaboration, I would like to emphasize the importance of creating a big wave by leveraging the strengths of each organization. Additionally, I anticipate that cooperation between organizations with different backgrounds will yield synergistic effects.