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首页> 外文期刊>IEEE transactions on circuits and systems . I , Regular papers >System-Level Analysis of Far-Field Radio Frequency Power Delivery for mm-Sized Sensor Nodes
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System-Level Analysis of Far-Field Radio Frequency Power Delivery for mm-Sized Sensor Nodes

机译：毫米尺寸传感器节点的远场射频功率传输的系统级分析

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摘要

Millimeter-sized and low-cost sensor nodes can enable future applications of the Internet of Things (IoT), for which the number of sensors is projected to grow to a trillion within the next decades. RF far-field power transfer is a potential technique for wirelessly powering these sensors since it offers flexible configuration of sensor networks, beamforming capability and a large power transfer range compared to near-field approaches. However, system design for RF power transfer needs to be completely rethought to enable this new paradigm of a trillion IoT sensors. This paper, therefore, presents a comprehensive, system-level analysis strategy and a modular framework for investigating the fundamental efficiency components in an RF power transfer chain. Through this detailed analysis, it is demonstrated that the optimal frequency is primarily determined by the antenna size and the quality factors of components in the matching network. Millimeter-wave frequencies are shown to be optimal for powering mm-sized sensors for practical matching component values. An intuitive explanation of our results is also provided, along with insights for the design and practical implementation of RF power transfer systems for the IoT space.
机译：毫米大小和低成本的传感器节点可以支持物联网（IoT）的未来应用，预计在未来几十年中，传感器的数量将增长到一万亿。射频远场功率传输是一种为这些传感器无线供电的潜在技术，因为与近场方法相比，它提供了传感器网络的灵活配置，波束成形能力和较大的功率传输范围。但是，需要完全重新考虑用于RF功率传输的系统设计，以实现这种万亿级IoT传感器的新范例。因此，本文提出了一种全面的系统级分析策略和一个模块化框架，用于研究RF功率传输链中的基本效率组件。通过详细的分析，可以证明最佳频率主要由天线尺寸和匹配网络中组件的质量因数决定。结果表明，毫米波频率对于为毫米大小的传感器供电以实现实际匹配的组件值是最佳的。还提供了对我们结果的直观解释，以及对物联网领域射频功率传输系统的设计和实际实施的见解。

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