文章基本信息

标题：Direct Transmission of Digital Message via Programmable Coding Metasurface
本地全文：下载
作者：Tie Jun Cui ; Shuo Liu ; Guo Dong Bai 等
期刊名称：Research
电子版ISSN：2639-5274
出版年度：2019
卷号：2019
页码：1-12
DOI：10.34133/2019/2584509
语种：English
出版社：American Association for the Advancement of Science
摘要：In modern wireless communications, digital information is firstly converted to analog signal by a digital-analog convertor, which is then mixed to high-frequency microwave to be transmitted through a series of devices including modulator, mixer, amplifier, filter, and antenna and is finally received by terminals via a reversed process. Although the wireless communication systems have evolved significantly over the past thirty years, the basic architecture has not been challenged. Here, we propose a method to transmit digital information directly via programmable coding metasurface. Since the coding metasurface is composed of ‘0’ and ‘1’ digital units with opposite phase responses, the digital information can be directly modulated to the metasurface with certain coding sequences and sent to space under the illumination of feeding antenna. The information, being modulated in radiation patterns of the metasurface, can be correctly received by multiple receivers distributed in different locations. This method provides a completely new architecture for wireless communications without using complicated digital-analog convertor and a series of active/passive microwave devices. We build up a prototype to validate the new architecture experimentally, which may find promising applications where information security is highly demanded.