应用于脑出血探测的宽带定向天线研究

Research on Broadband Directional Antenna Applied in Cerebral Hemorrhage Detection

设计了一款尺寸为70 mm×30 mm×30 mm的加载三圆式引向器宽带定向天线。该天线采用三维偶极子结构并加载三圆式引向器来改善天线在整个频段内的辐射特性,以满足微波探测脑出血穿透力的需求。天线在S_(11)<-10 dB的工作频带为1.1~3.57 GHz,相对带宽为104.3%,最大增益达到7.24 dBi,相对于未加载引向器的情况,频带内增益最大提高了3 dB。对该天线进行加工测试,实测结果与仿真结果吻合良好。将该天线导入Sim4Life中并进行脑出血仿真研究,结果表明,加载引向器的天线能获得大脑内部更强的散射信号,可应用于脑出血探测等领域。

A wideband directional antenna loaded with a three-circle director is proposed. The overall size is 70 mm×30 mm×30 mm. Based on the three-dimensional dipole structure loaded with a three-circle director, the radiation characteristics of the antenna is improved in the bandwidth. It is shown that the antenna meets the penetration requirements of microwave detection in cerebral hemorrhage. The operating frequency band of the antenna is 1.1-3.57 GHz(104.3%), and the maximum gain reaches 7.24 dBi. Compared with antenna without director, the maximum gain is increased over 3 dB in the band. The antenna is processed and tested, and the measured results are in good agreement with the simulated. The antenna is imported into Sim4 Life and a simulation study of cerebral hemorrhage is carried out. The results show that the antenna loaded with the director can obtain a stronger scattering signal inside the brain, which can be used in cerebral hemorrhage detection and other fields.