School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, P. R. China.
Research Centre for Information Technology, Shenzhen Institute of Information Technology, Shenzhen 518172, P. R. China.
ACS Appl Mater Interfaces. 2023 Jun 14;15(23):28240-28247. doi: 10.1021/acsami.3c04292. Epub 2023 Jun 2.
This article describes the implementation of a wireless human motion detection with interference resistance to untargeted deformations based on a stretchable patch antenna with fractal design. By rationally incorporating the Hilbert fractal pattern in the conductive patch and ground plane, the patch antenna shows a mechanical stretchability of ∼40% and a maximum gain of 2.95 dB at 2.5 GHz. Furthermore, the influence of the fractal order on the mechanical stretchability and radiation properties of the stretchable patch antenna is discussed. The resonant frequency of the stretchable fractal antenna demonstrates highly selective sensitivity to different deformations; i.e., it remains almost unchanged with bending deformations and is linearly dependent on the tensile strain. Remote detection of joint motions is experimentally verified by a wireless on-body strain sensor based on the fractal design-based stretchable microstrip antenna.
本文描述了一种基于分形设计的可拉伸贴片天线的无线人体运动检测的实现，该检测具有抗非目标变形的干扰能力。通过在导电贴片和接地面中合理地结合希尔伯特分形图案，贴片天线具有约 40%的机械拉伸性和在 2.5GHz 时的最大增益 2.95dB。此外，还讨论了分形阶数对可拉伸贴片天线的机械拉伸性和辐射特性的影响。可拉伸分形天线的谐振频率对不同变形具有高度选择性的灵敏度；也就是说，它在弯曲变形时几乎保持不变，并且与拉伸应变呈线性关系。基于分形设计的可拉伸微带天线的无线体应变传感器实验验证了关节运动的远程检测。
