经皮无线传能的柔性可穿戴发射天线设计

doi:10.3969/j.issn.0258-8021.2025.02.005

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Abstract The bidirectional peripheral nerve interface (PNI) can help to rebuild the sensory function of amputees. In this work, a flexible wearable antenna was proposed to enable a focused midfield wireless power for the implanted PNI. To generate a focused field, a symmetrical quadruple-feed antenna of 60 mm×60 mm was slotted to optimize the surface current distribution. The simulation results showed that the resonant frequency of the antenna was 1.524 GHz with the absolute bandwidth of 1.385~1.726 GHz, the resonant frequency offsets were less than 0.2 GHz for the bent antennas with the curvature radius varying from 60 mm to 110 mm. The simulated magnetic field intensity at the implanted receiver was 0.012 A/m, 0.058 A/m, and 0.065 A/m for in-phase excitation, time-reversed phase excitation, and orthogonal phase excitation, respectively. The experimental results showed that the resonant frequency of the proposed antenna was 1.531 GHz with the absolute bandwidth of 1.401~1.765 GHz, the variations of the antenna frequency due to curvature were less than 0.3 GHz with the curvature radius of 60 mm, 80 mm, and 100 mm. The measured magnetic fields at the receiver within the simulated tissue gel, generated by the antenna with the time-reversed phase excitation (0.045 A/m) and the orthogonal phase excitation (0.049 A/m) were much greater than that by using the in-phase excitation (0.0035A/m). In conclusion, the symmetrical quadruple-feed antenna with the time reversed phase excitation or the orthogonal phase excitation can generate observable focusing effect.

Key words： peripheral neural interface mid-field wireless power transfer flexible and wearable antenna magnetic dipole array time reversal method

Received: 02 January 2024

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R318

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	Articles by authors
	Xu Qi
	Feng Chenyu
	Sun Yuan

Cite this article:

Xu Qi,Feng Chenyu,Sun Yuan. Design of Wearable Flexible Antenna for Transcutaneous Wireless Power Transfer[J]. Chinese Journal of Biomedical Engineering, 2025, 44(2): 174-182.

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http://cjbme.csbme.org/EN/10.3969/j.issn.0258-8021.2025.02.005 OR http://cjbme.csbme.org/EN/Y2025/V44/I2/174

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