Zhang Jie, Du Chengzhu, Wang Ruohui
College of Electronics and Information Engineering, Shanghai University of Electric Power, Shanghai 200090, China.
Micromachines (Basel). 2022 Dec 3;13(12):2141. doi: 10.3390/mi13122141.
A 2 × 2 ultra-wideband MIMO flexible antenna with a low profile and good isolation was designed for Internet of Things (IoT) realms and wearable devices. The antenna elements were placed on a novel flexible substrate of liquid crystal polymer (LCP) with compact dimensions fed by a coplanar waveguide (CPW). In order to ameliorate isolation, the cross-shaped decoupling branches were placed among the antenna elements. The proposed UWB antenna can operate from 2.9 GHz to 10.86 GHz with a good reflection coefficient of S11 < −10 dB as well as a high isolation better than 22 dB. Its operating bands include 5G, WiFi, X-band, etc. Moreover, the parameters of diversity performance were also tested. These parameters included an average gain of approximately 4 dB, a low ECC of less than 0.01, and good diversity gain of 9.999. The flexible MIMO antenna performs well in bending and on-body conditions. To sum up, the antenna has good prospects in IoT applications and wearable fields.
设计了一种用于物联网（IoT）领域和可穿戴设备的具有低剖面和良好隔离度的2×2超宽带MIMO柔性天线。天线元件放置在新型紧凑型液晶聚合物（LCP）柔性基板上，由共面波导（CPW）馈电。为了改善隔离度，在天线元件之间放置了十字形去耦分支。所提出的超宽带天线可在2.9 GHz至10.86 GHz范围内工作，具有良好的反射系数S11 < -10 dB以及优于22 dB的高隔离度。其工作频段包括5G、WiFi、X波段等。此外，还测试了分集性能参数。这些参数包括平均增益约为4 dB、低ECC小于0.01以及良好的分集增益9.999。该柔性MIMO天线在弯曲和人体佩戴条件下表现良好。综上所述，该天线在物联网应用和可穿戴领域具有良好的前景。
