1．Main points of research
- The use of terahertz waves for radar enables higher resolution than conventional radio waves such as millimeter waves, and higher transmissivity than light.
- The lack of low-loss materials suitable for manufacturing phase shifters and circulators has prevented integrating radar systems in the terahertz range.
- By redesigning the waveguide structure and the frequency sweep scheme, terahertz radar was built without using phase shifters and circulators.
- As a proof of concept of practical applications, contactless heartbeat measurement by detecting a minute displacement of the surface of a person’s chest through clothing was demonstrated.
2．Background of research
3．Summary and results
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