Holographic communication is intended as a holistic way to manipulate, with unprecedented flexibility, the electromagnetic field generated or sensed by an antenna. This is of particular interest when using large antennas at high frequency (e.g., at millimeter-wave or terahertz), whose operating condition may easily fall in the Fresnel region (radiating near-field), where the classical plane wave propagation assumption is no longer valid. This article analyzes the optimal communication involving large intelligent surfaces realized, for example, with metamaterials as possible enabling technology for holographic communication. It is shown that traditional propagation models must be revised and that, when exploiting spherical wave propagation in the near-field region, new opportunities are opened, for example, in terms of feasible orthogonal communication channels.

中文翻译：

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使用智能表面的全息通信


全息通信旨在作为一种整体方式，以前所未有的灵活性来操纵天线产生或感测的电磁场。当在高频（例如，毫米波或太赫兹）使用大型天线时，这一点特别令人感兴趣，其工作条件可能很容易落入菲涅尔区域（辐射近场），其中经典平面波传播假设不再适用有效的。本文分析了涉及大型智能表面的最佳通信，例如使用超材料作为全息通信的可能实现技术。结果表明，必须修改传统的传播模型，并且当在近场区域利用球面波传播时，会带来新的机会，例如，在可行的正交通信信道方面。