Backscatter communication is a burgeoning low-power communication technology that has been introduced into the Internet of Things (IoT) due to its excellent self-sustainability. However, conventional backscatter communication (BackCom) technologies often suffer from insufficient data transmission rates and are difficult to meet the increasing bandwidth demands of Internet of Things applications. In contrast, millimeter wave (mmWave) backscatter communication holds great potential for high-speed data transmission because of its rich spectrum resources. Therefore, this paper presents a comprehensive survey of the existing literature on mmWave backscatter communications. Firstly, we introduce the fundamental principles of mmWave backscatter communication, including its architecture, basic techniques, and primer knowledge. Subsequently, we review the various mmWave backscatter communication techniques proposed in the current literature. We then discuss some applications based on these techniques before finally addressing some challenges and open issues associated with mmWave backscatter.

翻译：反向散射通信是一种新兴的低功耗通信技术，因其优异的自可持续性而被引入物联网。然而，传统反向散射通信技术往往存在数据传输速率不足的问题，难以满足物联网应用日益增长的带宽需求。相比之下，毫米波反向散射通信凭借其丰富的频谱资源，在高速度数据传输方面具有巨大潜力。因此，本文对现有毫米波反向散射通信相关文献进行了全面综述。首先，我们介绍了毫米波反向散射通信的基本原理，包括其架构、基础技术和预备知识。随后，我们回顾了当前文献中提出的各种毫米波反向散射通信技术。接着，我们讨论了基于这些技术的一些应用，最后阐述了毫米波反向散射面临的部分挑战和开放性问题。