柔性双频体表通信天线结构的可靠性分析

体表通信天线作为穿戴式电子设备的关键部分,工作在弯曲状态下的可靠性是天线设计中需要考虑的重要因素。采用聚酰亚胺作为柔性基底,使双频天线能够在人体表面弯曲贴合,同时加载双频柔性人工磁导体结构,降低天线与人体之间的相互影响。通过CST电磁仿真软件中Gustav人体模型进行仿真分析,表明天线结构工作于2. 45 GHz和5. 8 GHz双频段,同时分析了弯曲条件下的工作性能。通过对比人体比吸收率值的变化,分析了天线结构的可靠性。仿真和实测的结果表明:天线结构在人体表面弯曲半径大于10 mm时的工作特性保持稳定,比吸收率在2. 45 GHz处降低了62%,在5. 8 GHz处降低了86%,满足ICNIRP标准。

双频段体表/体外双模式可穿戴天线设计

基于特征模理论分析方法,设计了一款2.45、5.8 GHz频段的体表/体外双模式可穿戴天线。在三角形的辐射贴片和接地面之间加载一段微带线,在2.45 GHz引入一个具有全向辐射特性的新模式,加上三角形贴片本身在5.8 GHz具有的定向辐射特性,组成了一个双频段双模式可穿戴天线。天线的仿真结果表明,在低频处实现全向辐射特性,阻抗带宽为1.6%(2.45~2.49 GHz),可用于体表通信模式;在高频处具有定向辐射特性,阻抗带宽为4.3%(5.67~5.92 GHz),可用于体外通信模式。

单频段体表/体外双模式可穿戴天线设计

设计了一款5.5 GHz频段基于超表面的宽带方向图分集天线,可应用于单频段体表/体外双通信模式。通过对超表面天线进行特征模分析,选择合适的定向和全向特征模式,修正超表面结构,抑制高次模,设计合适的馈电结构将其激励出来。最后仿真和测试的结果表明,端口1具有全向辐射特性,可用于体表通信模式;端口2具有定向辐射特性,可用于体外通信模式。天线两种模式的工作带宽为23.6%(4.98 GHz~6.25 GHz),带内隔离度高于30 dB。

Study on the Application of Aesthetic Ideas to Micro-film Advertising

Micro-film is a product from the development of mobile media technology based on the network media, and the short and typical screen expression ability and effect are its forms of contents. Different from the communication way of traditional advertising, micro-film advertising has the characteristics of both social networking and video communication. With the creative characteristics of micro-film advertising, the conamunication way of video advertising has been started. In this paper, through the introduction to the advantages of micro-film advertising communication and combining with the development of micro-film in the new period, the application of aesthetic ideas to micro-film advertising is further explored, and then the striking expression effect caused by micro-film advertising is introduced.