News

Radio-Wave Absorbers for Millimeter-Wave and Terahertz Frequencies Enhance Advanced Antenna Beamforming and Steering

A collaborative research team, including the Institute of Science Tokyo (formerly Tokyo Institute of Technology), has developed wide-incident-angle radio-wave absorbers for millimeter-wave and terahertz applications. These absorbers demonstrate wideband frequency absorption up to an incident angle of 60 degrees, made possible through the use of frequency selective surface (FSS) patterns. This innovation greatly improves the absorbers’ efficiency in advanced communication systems, such as 5G and Beyond 5G networks. Notably, the absorbers also allow low-frequency signals, like Wi-Fi, to pass through, distinguishing them from conventional absorbers. This dual functionality makes them highly versatile and suitable for modern communication systems that demand both high-frequency signal absorption and low-frequency transmission.

Fabricated radio-wave absorber and measurement setup (a) at 30 GHz and (b) at 150 GHz. Measurement results (c) at 30 GHz and (d) at 150 GHz

Contact

Asst. Prof. Sangyeop Lee（Applied Electronics Research Core）
http://www.ateal.first.iir.titech.ac.jp/