Gaire Pawan, Vital Dieff, Khan Md Rayhan, Chibane Cherif, Bhardwaj Shubhendu
Department of Electrical and Computer Engineering, Florida International University, Miami, 33174, USA.
WiGL inc., Hampton, VA, 23666, USA.
Sci Rep. 2021 Sep 9;11(1):17867. doi: 10.1038/s41598-021-97528-5.
Wireless charging of devices has significant outcomes for mobile devices, IoT devices and wearables. Existing technologies consider using Point to Point type wireless transfer from a transmitter Tx (node that is sending Power) to a receiver Rx (node that receives power), which limits the area of coverage for devices. As a result, existing systems are forced to use near field coupling to charge such devices. Fundamental limitation is also that such methods limit charging to a small hotspot. In partnership with Wireless Electrical Grid LANs (WiGL pronounced "wiggle"), we demonstrate patented Ad-hoc mesh networking method(s) to provide wireless recharging at over 5 feet from the source, while allowing significant lateral movement of the receiver on the WiGL (Wireless Grid LAN or local area network). The transmitter network method leverages a series of panels, operating as a mesh of transmitters that can be miniaturized or hidden in walls or furniture for an ergonomic use. This disruptive technology holds the unique advantage of being able to provide recharging of moving targets similar to the cellular concept used in WiLAN, as opposed to prior wireless charging attempts, which only allow a hotspot-based charging. Specifically, we demonstrate the charging of a popular smartphone using the proposed system in the radiating near field zone of the transmitter antennas, while the user is free to move in the space on the meshed network. The averaged received power of 10 dBm is demonstrated using 1W RF-transmitter(s), operating in the 2.4 GHz ISM band. The proposed hardware consists of antennas arrays, rectennas, power management and USB 2.0 interfaces for maintaining a voltage between 4.2 and 5.3 V and smooth charging. We also show extending the wireless grid coverage with the use of multiple transmitting antennas, and mechanical beam-steering even further an increased coverage using the proposed system.
设备的无线充电对移动设备、物联网设备和可穿戴设备有着重大影响。现有技术考虑使用从发射器Tx（发送电力的节点）到接收器Rx（接收电力的节点）的点对点式无线传输，这限制了设备的覆盖范围。因此，现有系统被迫使用近场耦合来为这类设备充电。其根本局限性还在于，这些方法将充电限制在一个小的热点区域。与无线电网局域网（WiGL，发音为“wiggle”）合作，我们展示了获得专利的自组织网状网络方法，可在距离电源超过5英尺的地方提供无线充电，同时允许接收器在WiGL（无线电网局域网或局域网）上进行大幅横向移动。发射器网络方法利用一系列面板，这些面板作为发射器网格运行，可以小型化或隐藏在墙壁或家具中以实现符合人体工程学的使用。这项颠覆性技术具有独特优势，能够为移动目标充电，类似于WiLAN中使用的蜂窝概念，这与之前的无线充电尝试不同，之前的尝试仅允许基于热点的充电。具体而言，我们展示了在发射器天线的辐射近场区域使用所提出的系统为一款流行的智能手机充电，而用户可以在网状网络空间中自由移动。使用工作在2.4 GHz ISM频段的1W射频发射器，展示了平均接收功率为10 dBm。所提出的硬件包括天线阵列、整流天线、电源管理和USB 2.0接口，用于维持4.2至5.3 V之间的电压并实现平稳充电。我们还展示了使用多个发射天线扩展无线电网覆盖范围，以及使用所提出的系统通过机械波束控制进一步扩大覆盖范围。
