The Effect of Mechanical Deformation on Electrical Properties of Near-field Communication Device

Flexible near-field communication (NFC) devices for wearable electronics often work in the state of deformation. In this paper, the electrical properties of a flexible NFC device under different bending and twisting deformations are studied. Theoretical analysis and experimental results show that the electrical properties of the NFC device are closely related to the effective area of the NFC device. The larger the change rate of the effective area of the NFC antenna is, the more the decline of the electrical properties of the NFC device is. According to the theoretical analysis of the effective area of the NFC antenna, we can see that the smaller the area is, the stronger the ability of the device to resist deformation is, and the NFC device with axisymmetric structure has better electrical stability. The preliminary results are expected to serve as a reference for the optimization design of the flexible NFC devices in wearable electronics.