Sub-Terahertz Electromagnetic-Wave Absorber for Future Wireless Communication

Sub-terahertz (Sub-THz) frequencies are a promising frequency band for ultra-high-speed data communication in the future. D-band frequencies are one of them for beyond 5G/6G communication from 2030. To realize it, a method by employing an electromagnetic-wave (EM) absorber to suppress the cavity resonance at those frequencies and to increase reliability has been required at the module-fabrication level. In this work, we show an ultra-wideband D-band EM absorber based on the measurement results of dielectrics.