行波机理对低散射目标支架雷达散射截面的影响研究

Impact of Traveling Wave Mechanism on the RCS of Metal Pylon

针对雷达低散射支架,文中首先采用天线机理分析行波对雷达散射截面(RCS)的贡献,并且使用等效相速度的概念求出双弧线外形目标支架在远区的辐射场,最后分析得出低散射支架行波辐射特性,并讨论行波对目标支架RCS的影响。

Firstly for ogive-shaped metal pylon,the antenna mechanism is adopted in this paper to analyze the far-field radiation to observation point produced by traveling-wave linear conducting wire,then directional pattern and radiation characteristic of traveling-wave conducting wire are derived by related theories.In addition,for longer forward distance,the axial velocity of traveling wave is less than that on surface.Hence the concept of 'mean phase velocity' is introduced to solve the far-field radiation of arc-shaped traveling-wave wire.Finally,the method of integral and phase difference is used to calculate overall RCS of metal pylon to the radar.Therefore,the radiation characteristic of traveling wave and RCS of metal pylon are obtained with quantitative form.