负磁超材料增强的柔性高增益能量收集天线

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关键词：射频能量收集；柔性天线；高增益；超材料结构；无源物联网

中图分类号：TN827

文献标识码：A

DOI：10.14106/j.cnki.1001-2028.2025.1456

引用格式：王霞， 高建， 薛凯涵， 等. 负磁超材料增强的柔性高增益能量收集天线 [J]. 电子元件与材料， 2025， 44（3）： 322-330.

Reference format： WANG Xia， GAO Jian， XUE Kaihan， et al. Flexible high gain energy harvesting antenna enhanced by negative magnetic metamaterial [J]. Electronic Components and Materials， 2025， 44（3）： 322-330.

Flexible high gain energy harvesting antenna enhanced by negative

magnetic metamaterial

WANG Xia  1，GAO Jian  1， XUE Kaihan  1， ZHANG Xiangyu  1， WANG Mengjun 1， 2

（1. School of Electronics and Information Engineering， Hebei University of Technology， Tianjin 300401， China;

2. State Key Laboratory of Reliability and Intelligence of Electrical Equipment， Tianjin 300401， China）

Abstract： A metamaterial-integrated antenna featuring negative permeability was designed and fabricated to realize miniaturized， flexible， and high-gain electromagnetic energy harvesting for passive IoT systems. The negative permeability metamaterial was loaded as a parasitic patch on the back of the CPW antenna. By utilizing the magnetic resonance of the negative pemeability metamaterial， a stronger surface current was excited to enhance the gain. Analysis was performed to understand the effect of negative permeability of the metamaterial structures on the antenna gain enhancement. Polyimide was used as a substrate for the antenna， which has an operating frequency from 890 to 920 MHz and a size of 54 mm×63 mm×0.22 mm in dimensions. Experimental results demonstrate significant gain improvement through the metamaterial integration， which achieves a peak gain enhancement of 1.5 dBi within the operational band. At 915 MHz， the optimized antenna exhibits a measured gain of 3.1 dBi. The proposed antenna exhibits high gain， low profile， compact structure， and flexibility， which makes it suitable for passive IoT applications.

Keywords： radio frequency energy harvesting; flexible antenna; high gain; metamaterial structure; passive Internet of Things

物联网行业正处于飞速发展的阶段，“万物互联”已成为当今社会发展的重要目标。（剩余8484字）