2026-07-24 ペンシルベニア州立大学（PennState）
Researchers demonstrated a soft, printable hydrogel electrode that conforms to the skin while recording physiological signals. The material maintained close contact during movement and under wet conditions, offering a potential platform for future wearable health-monitoring technologies. Credit: Huanyu “Larry” Cheng/Penn State. All Rights Reserved.
＜関連情報＞
- https://www.psu.edu/news/materials-research-institute/story/stretchable-antenna-keeps-wearable-health-sensors-tune-human
- https://www.nature.com/articles/s41467-026-74900-5
多方向歪みに影響されない伸縮性RFエレクトロニクス Multidirectional strain-insensitive stretchable RF electronics
Furong Yang,Senhao Zhang,Jinyao Zhang,Yao Tong,Jun Zhong,Junjie Zheng,Jiawei Li,Yichao Hu,Yangbo Yuan,Jia Zhu,Kai Xu,Cheng Zhang,Huanyu Cheng & Chaoyun Song
Nature Communications Published:27 June 2026
DOI:https://doi.org/10.1038/s41467-026-74900-5 Unedited version
Abstract
Stretchable radio-frequency (RF) electronics underpin emerging wearable systems for body-centric communication, continuous health monitoring, and wireless power transfer. However, on-body stretchable antennas undergo multidirectional in-plane strain during natural motion, which detunes resonance and destabilizes wireless links. Existing strain-insensitive designs are typically effective only along prescribed loading directions and often compromise radiation performance. Here, we establish a systematic directional mechano-electromagnetic analysis framework for resonant planar antennas and introduce a dual-port multidirectional strain-insensitive antenna (DP-MSiA), whereby strain-insensitive resonance (shift ≤ 40 MHz at 2.45 GHz) is achieved under up to 45% strain across diverse in-plane directions. Based on the stable resonance and high realized gain of the DP-MSiA, we demonstrate strain-insensitive wireless energy harvesting with rectifiers under in-plane strain of varying direction and magnitude, as well as a strain-robust on-body communication system that sustains stable multimodal health-data transmission during natural motion. Our work opens new opportunities for creating deformation-insensitive electronics and enables integrated functionalities in wearable and embodied systems.
