Monitoring system with Bluetooth low energy (BLE) beacons is promising for position identification of elderly wanderers. BLE beacons can be mounted in shoes for convenience, and a shoe-mounted directional antenna is expected to efficiently radiate the beacon signals to the data server of the monitoring system. In this paper, a directional array antenna with planar or curved structure was designed on the shoe surface for this purpose. The antenna was designed to sweep diagonally upward from 10° to 50°, and the simulated and measured S₁₁ performances revealed reasonable agreement. The antenna was assumed to be used in an urban environment, and a directional patch array antenna with dielectric lens was also designed to receive beacon signals by mounting it on utility poles. According to a feasibility experiment result of elderly wanderer position identification, the designed directional antenna can provide an almost 100% position identification rate if a wanderer is within 20 m from a smart phone user.

带有蓝牙低功耗 (BLE) 信标的监控系统有望用于老年流浪者的位置识别。为方便起见，可以将 BLE 信标安装在鞋子中，而鞋子安装的定向天线有望将信标信号有效地辐射到监控系统的数据服务器。为此，本文在鞋面设计了一种平面或曲面结构的定向阵列天线。天线设计为从 10° 到 50° 对角向上扫描，模拟和测量的S ₁₁表演显示出合理的一致。假设天线用于城市环境，还设计了带有电介质透镜的定向贴片阵列天线，通过将其安装在电线杆上来接收信标信号。根据老年流浪者位置识别的可行性实验结果，设计的定向天线在流浪者 距离智能手机用户20m以内时，其位置识别率几乎可以达到100% 。