[...] This paper explores how spectrum policy and spectrum technologies can evolve to enable sharing among different stakeholders in the above 100 GHz spectrum, without introducing harmful interference or disrupting either security applications or fundamental science exploration. This portion of the spectrum presents new opportunities to design spectrum sharing schemes, based on novel antenna designs, directional ultra-high-rate communications, and active/passive user coordination. The paper provides a tutorial on current regulations above 100 GHz, and highlights how sharing is central to allowing each stakeholder to make the most out of this spectrum. It then defines - through detailed simulations based on standard International Telecommunications Union (ITU) channel and antenna models - scenarios in which active users may introduce harmful interference to passive sensing. Based on this evaluation, it reviews a number of promising techniques that can enable active/passive sharing above 100 GHz. The critical review and tutorial on policy and technologies of this paper have the potential to kickstart future research and regulations that promote safe coexistence between active and passive users above 100 GHz, further benefiting the development of digital technologies and scientific exploration.

翻译：本文探讨了频谱政策与频谱技术如何演进，以支持不同主体在100 GHz以上频段实现共享，同时避免引入有害干扰，或破坏安全应用及基础科学探索。该频段基于新型天线设计、定向超高速通信以及有源/无源用户协调，为设计频谱共享方案提供了新机遇。本文首先介绍了100 GHz以上频段的现行监管规则，并强调了共享对于各主体最大化利用该频谱的核心作用；随后，基于国际电信联盟（ITU）标准信道与天线模型开展详细仿真，定义了有源用户可能对无源感知造成有害干扰的场景；基于该评估，进一步综述了多项有望实现100 GHz以上有源/无源共享的前沿技术。本文对政策与技术的批判性综述及入门教程，有望推动未来研究及监管规则制定，促进100 GHz以上有源与无源用户的安全共存，从而进一步惠及数字技术发展与科学探索。