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首页> 外文期刊>International Journal of Microwave and Wireless Technologies >An orientation-independent UHF rectenna array with a unified matching and decoupling RF network
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An orientation-independent UHF rectenna array with a unified matching and decoupling RF network

机译：具有统一匹配和去耦RF网络的与方向无关的UHF整流天线阵列

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摘要

This work describes the design of a rectenna array exploiting orthogonal, closely-spaced UHF monopoles for orientation-independent RF energy harvesting to energize a passive tag, designed for UWB localization, with wake-up radio (WUR) capabilities. To reach this goal, different RF networks are studied to simultaneously realize RF decoupling of the antenna elements and matching of the radiating elements to the non-linear network of rectifiers. The design is performed for a wide power range of the RF incoming signals that need to be exploited for both energizing the passive tag and for providing energy autonomy to a WUR sub-system, used to minimize the long-term power consumption during tag standby operations. Two meandered cross-polarized monopoles, located in close proximity, and thus highly coupled, are adopted for orientation-insensitive operations. The combining RF network is reactive and includes an unbalanced power divider to draw a fraction of the harvested energy to a secondary way for WUR operations. The performance of the harvester is first optimized by EMon-linear co-design of the whole system over an interval of low RF power levels. The system has been realized and experimentally validated: the superior results obtained, in terms of both dc voltage and power, with respect to a standard single-monopole rectenna, justify the deployment of the presented tag for the energy autonomy of future generation radio-frequency identification tags for indoor localization.
机译：这项工作描述了一种整流天线阵列的设计，该阵列利用正交的，紧密间隔的UHF单极子来获取与方向无关的RF能量，以激发无源标签，该标签专门为UWB定位而设计，具有唤醒无线电（WUR）功能。为了达到这个目标，研究了不同的射频网络以同时实现天线元件的射频去耦以及辐射元件与整流器非线性网络的匹配。该设计针对射频输入信号的宽功率范围执行，需要利用它们为无源标签供能并为WUR子系统提供能量自主权，以最大程度地减少标签待机操作期间的长期功耗。方向不敏感的操作采用两个曲折的交叉极化单极子，它们非常靠近并因此高度耦合。合并的RF网络是无功的，并且包括一个不平衡的功率分配器，以将一部分收集的能量吸收到用于WUR操作的次级途径中。首先通过在低RF功率水平间隔内整个系统的EM /非线性协同设计来优化收割机的性能。该系统已经实现并通过实验验证：相对于标准单单极整流天线，在直流电压和功率方面均获得了优异的结果，证明了所展示标签的部署是下一代射频能量自主性的证明用于室内定位的识别标签。

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