用于自供电物联网和医疗传感器中高效5.8 GHz射频能量收集的小型化电磁带隙天线

Miniaturized EBG Antenna for Efficient 5.8 GHz RF Energy Harvesting in Self-Powered IoT and Medical Sensors.

作者信息

Albaihani Yahya, Akram Rizwan, Almohaimeed Abdullah M, Almohaimeed Ziyad M, Buhari Lukman O, Shaban Mahmoud

机构信息

Department of Electrical Engineering, College of Engineering, Qassim University, Buraydah 51452, Saudi Arabia.

出版信息

Sensors (Basel). 2025 Aug 3;25(15):4777. doi: 10.3390/s25154777.

DOI:10.3390/s25154777

PMID:40807944

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12349637/

Abstract

This study presents a compact and high-efficiency microstrip antenna integrated with a square electromagnetic band-gap (EBG) structure for radio frequency energy harvesting to power battery-less Internet of Things (IoT) sensors and medical devices in the 5.8 GHz Industrial, Scientific, and Medical (ISM) band. The proposed antenna features a compact design with reduced physical dimensions of 36 × 40 mm (0.69λ × 0.76λ) while providing high-performance parameters such as a reflection coefficient of -27.9 dB, a voltage standing wave ratio (VSWR) of 1.08, a gain of 7.91 dBi, directivity of 8.1 dBi, a bandwidth of 188 MHz, and radiation efficiency of 95.5%. Incorporating EBG cells suppresses surface waves, enhances gain, and optimizes impedance matching through 50 Ω inset feeding. The simulated and measured results of the designed antenna show a high correlation. This study demonstrates a robust and promising solution for high-performance wireless systems requiring a compact size and energy-efficient operation.

摘要

本研究提出了一种紧凑高效的微带天线，该天线集成了方形电磁带隙（EBG）结构，用于在5.8 GHz工业、科学和医疗（ISM）频段进行射频能量收集，以为无电池物联网（IoT）传感器和医疗设备供电。所提出的天线具有紧凑的设计，物理尺寸减小至36×40 mm（0.69λ×0.76λ），同时提供高性能参数，如反射系数为-27.9 dB、电压驻波比（VSWR）为1.08、增益为7.91 dBi、方向系数为8.1 dBi、带宽为188 MHz以及辐射效率为95.5%。加入EBG单元可抑制表面波、提高增益，并通过50Ω嵌入式馈电优化阻抗匹配。所设计天线的仿真和测量结果显示出高度相关性。本研究为需要紧凑尺寸和高能效运行的高性能无线系统展示了一种可靠且有前景的解决方案。