OAM (Orbital Angular Momentum) method is expected to be applicable for new radio transmission technology for beyond fifth-generation mobile communications system. This workshop was aimed to present and discuss OAM radio transmission technologies by the presenters. We deeply discussed on wide aspects of the technological subjects, bottlenecks, solutions and practical timelines in relation to the presentations given by three renowned leading researchers and questions, and deepened common understanding of future prospects.

Prof. Atushi Sanada (Osaka University) presented the analog OAM radio transmission technology which includes the experimental result of the radio transmission in the center frequency of 10 GHz and the bandwidth of 2 GHz. He also presented the principle of the analog OAM radio transmission technology.

Mr. Eisaku Sasaki (NEC) presented the development of millimeter-wave OAM mode multiplexing system. He provided the experimental results of the development system in 5GHz and E bands, while he also presented the technical solution for degrading the performance of the development system.

Dr. Doohwam Lee (NTT Network Innovation Laboratories) presented the experimental results of 100 Gbps radio transmission technology which employ the OAM-MIMO multiplexing technology at 28 GHz band.

This workshop had a great merit for contributing to the research and development of the OAM radio transmission technology on the future ultrahigh-speed wireless communications towards beyond 6G on the way via post 5G followed by the next generation 6G. This workshop gave us very useful opportunity to understand the state-of-the-art research and development situation and to share common recognitions about technical issues and future outlooks against the independent future image of each participant envisioned.