一种超宽带双陷波可穿戴天线设计

Design of an ultra-wideband dual band-notched wearable antenna

基于牛仔布柔性材料,设计了一种小型化双陷波超宽带可穿戴天线。天线由牛仔布料基板、开槽单极子辐射贴片和缺陷地平面构成,具有超宽带特性,能覆盖3.1~10.6GHz的超宽带频段范围。通过在天线接地板刻蚀两条新型蜿蜒形槽和在单极子辐射贴片上添加对称枝节以实现双陷波特性。该天线结构紧凑,尺寸仅为24mm×28mm×0.84mm。仿真的-10dB天线工作带宽为143.7%(2.95~18GHz),并且天线在3.24~3.87GHz和5.11~5.91GHz频段内具有双陷波特性,能有效抑制全球微波互联接入系统(WiMAX)和无线局域网(WLAN)频段的干扰。此外,对天线的可弯曲性、辐射性能以及人体安全性能进行了分析。测试与仿真结果基本一致,表明该天线可用于可穿戴系统中。

Based on Denim flexible materials,a miniaturized double-notch ultra-wideband wearable antenna was designed.The antenna was composed of denim fabric substrate,slotted monopole radiation patch and defective ground plane,which had ultra-wideband characteristics and could cover the ultra-wideband frequency range of 3.1-10.6 GHz.Double notch characteristics were achieved by etching two new sinuous slots on the antenna ground plane and adding symmetrical branches to the monopole radiation patch.The antenna has a compact structure and the size is only 24 mm×28 mm×0.84 mm.The simulated-10 dB impedance bandwidth of the antenna is 143.7%(2.95-18 GHz),and it has double notch characteristics in the frequency bands of 3.24-3.87 GHz and 5.11-5.91 GHz,which can effectively suppress the interference in the Worldwide Interoperability for Microwave Access(WiMAX)and Wireless Local Area Network(WLAN)frequency bands.In addition,the flexibility,radiation performance,and human safety performance of the antenna were analyzed.The measured results are consistent with the simulation results,indicating that the antenna can be used in the wearable systems.