Kar Pankaj Chandra, Islam Md Ariful
Department of Information and Communication Technology, Comilla University, Cumilla, 3506, Bangladesh.
Department of Robotics and Mechatronics Engineering, University of Dhaka, Dhaka, 1000, Bangladesh.
Heliyon. 2023 Feb 22;9(3):e13964. doi: 10.1016/j.heliyon.2023.e13964. eCollection 2023 Mar.
Advances in information technology have dramatically enhanced mobile phones. Power capacity is one of the most significant limitations of a mobile phone. As a result, efficient energy management in such devices is critical everywhere. The goal of this research is to find a way to charge electronic devices wirelessly using radio frequency (RF) electromagnetic (EM) waves (Rectenna using energy detection-based spectrum sensing). Mechanical deformations cause frequency detuning, which lowers the effectiveness of antennas and rectennas that would otherwise allow wireless communication and RF energy harvesting in the far field. A rectenna based on a stretchable multiband antenna is designed as a self-powered system to perform reliably and integrate RF power received across its multiband despite mechanical deformations. Depending on what the battery needs, the proposed multiband antenna will work at 900 MHz, 1800 MHz, 2100 MHz, and 2.45 GHz as both an RF transducer and an RF energy harvester. Depending on the received RF power density (high), the receiving RF wave will be utilized for both communication and RF energy harvesting (RF-EH) when the battery's current voltage is less than 20% (referred to as "low voltage"). Otherwise, the received RF wave will be used only for RF-EH. The installed multiband rectifiers function perfectly in terms of efficiency and bandwidth. This proposed technique would reduce the charging crisis by 60-90% depending on the location of the mobile phone or receiver of ambient EM signals. This paper could help researchers in the field of RF energy-based wireless charging systems.
信息技术的进步极大地提升了移动电话。功率容量是移动电话最显著的限制因素之一。因此，此类设备中的高效能量管理在任何地方都至关重要。本研究的目标是找到一种利用射频（RF）电磁波进行电子设备无线充电的方法（基于能量检测频谱感知的整流天线）。机械变形会导致频率失谐，这会降低天线和整流天线的效率，否则这些天线将允许在远场进行无线通信和射频能量收集。一种基于可拉伸多频段天线的整流天线被设计为自供电系统，以便在存在机械变形的情况下仍能可靠运行并整合其多频段接收到的射频功率。根据电池的需求，所提出的多频段天线将在900兆赫兹、1800兆赫兹、2100兆赫兹和2.45吉赫兹工作，兼具射频换能器和射频能量收集器的功能。根据接收到的射频功率密度（高），当电池当前电压低于20%（称为“低电压”）时，接收到的射频波将同时用于通信和射频能量收集（RF-EH）。否则，接收到的射频波将仅用于射频能量收集。所安装的多频段整流器在效率和带宽方面表现出色。根据移动电话或环境电磁信号接收器的位置，这项所提出的技术将减少60%至90%的充电危机。本文可为基于射频能量的无线充电系统领域的研究人员提供帮助。
