一种套筒单极天线组成的宽带测向阵列

Broadband Direction Finding Antenna Array Consisted of Sleeve Monopole Antennas

介绍了一种加粗的套筒单极天线，并作为测向单元使用。运用HFSS电磁仿真软件进行参数优化，在单元驻波与水平面增益满足工程情况下有效降低了天线高度。将这种套筒单极天线组成圆阵，在得出阵列电磁特性的基础上再运用最小二乘法分析了圆阵测向性能。结果表明，该测向天线阵在灵敏度、测向精度及阵列高度上都有一定的优势，特别适合于一些运动平台安装使用。

A sleeve monopole antenna with thick radiator is introduced, and is also chosen to be cell of direction finding antenna array in this paper. The sleeve monopole antenna with thick radiator is optimized by the electromagnetic simulation software HFSS, and its vertical height is reduced effectively when voltage standing wave ratio and gain value of antenna cells on the horizontal are satisfied with apphcation on the project. The sleeve monopole antennas with thick radiator are used to constitute a circular array, and the minimum two multiplication principle is used to analyze direction finding performance of the circular array on the basis of gaining the electromagnetic performance of the array. The result shows that antenna array has a better advantage on sensitivity, direction finding precision and height of the array, and also shows it is fit for the installation usage on locomotive platform specially.