In this paper, a wearable antenna pressure sensor with electromagnetic bandgap (EBG) is proposed, which can be used to monitor the walking and fall states of the elderly. When the elderly walks and falls suddenly, the knee or elbow wearing the antenna sensor will touch the ground and put a lot of pressure on the antenna sensor, resulting in the resonance frequency shifts. The proposed antenna sensor is fabricated on flexible silicone substrate and works in the 2.45 GHz industrial, scientific and medical (ISM) band. A 3 × 3 EBG array is designed to reduce the specific absorption rate (SAR) of the antenna to the human body and increase the forward peak gain of the antenna from 1.63dBi to 4.36dBi. Furthermore, the antenna sensor exhibits high sensitivity of about 11 MHz/N to the pressure. To verify the simulated results, the sensing properties of the wearable antenna sensor were measured. The measured results have been found to be consistent with the simulated ones. Moreover, the bending performance study and SAR analysis reveal that the proposed antenna sensor is a good candidate for wearable devices.

本文提出了一种具有电磁带隙（EBG）的可穿戴天线压力传感器，可用于监测老年人的步行和跌倒状态。当老人突然走路跌倒时，佩戴天线传感器的膝盖或肘部会接触地面，对天线传感器施加很大的压力，导致共振频率偏移。拟议的天线传感器是在柔性硅胶基板上制造的，工作在 2.45 GHz 工业、科学和医疗 (ISM) 频段。3×3 EBG阵列设计用于降低天线对人体的比吸收率（SAR），将天线前向峰值增益从1.63dBi提高到4.36dBi。此外，天线传感器对压力表现出约 11 MHz/N 的高灵敏度。为了验证模拟结果，测量了可穿戴天线传感器的传感特性。已发现测量结果与模拟结果一致。此外，弯曲性能研究和 SAR 分析表明，所提出的天线传感器是可穿戴设备的良好候选者。