【摘要】 基于立体螺旋天线法向模工作模式,设计一种可工作于1.36 GHz的柔性窄带织物天线,旨在提升头盔集成天线的共形性及空间利用率。根据立体螺旋天线的关键结构参数进行仿真建模分析,探究实现目标工作频率的天线线圈匝数,并在优化后确定能在目标频段工作的其他天线结构参数。然后,通过机织工艺制备柔性窄带织物天线,同时研究天线厚度及导体直径对天线辐射性能的影响。研究表明:制备的柔性窄带织物天线线圈匝数为16时,1.36 GHz中心频率处实测回波损耗为-17.7 dB,在-10 dB水平的带宽为17 MHz,相对带宽为21.25%,且增益方向图与仿真结果趋势一致。研究提出的柔性窄带织物天线可为面向北斗卫星系统的可穿戴无线通信柔性天线及头盔天线的设计提供一种解决方案。更多还原

【Abstract】 A flexible narrowband fabric antenna operating at 1. 36 GHz, based on the normal-mode operation of a three-dimensional(3D) helical antenna, was designed to improve the conformality and space utilization of helmet-integrated antennas. Through simulation modeling analysis of the 3D helical antenna’s key structural parameters, the number of antenna coil turns required to achieve the target operating frequency was investigated. After optimization, other structural parameters ensuring operation within the desired frequency band were determined. Subsequently, the antenna was fabricated using a weaving process, and the impacts of antenna thickness and conductor diameter on its radiation performance were explored. The results demonstrated that when the number of coil turns was set to 16, the fabricated flexible narrowband fabric antenna exhibited a measured return loss of -17. 7 dB at the center frequency of 1. 36 GHz, a bandwidth of 17 MHz at the-10 d B return loss level, a relative bandwidth of 21. 25%, and a gain pattern consistent with the simulation results. The proposed flexible narrowband fabric antenna offers a viable solution for designing wearable wireless communication flexible antennas and helmet antennas tailored for the BeiDou satellite system.更多还原