P波段宽带宽角高隔离双线极化天线SAR应用研究

Research on application of P-band wide-bandwidth wide-angle high-isolation bipolarization antenna SAR

针对机载SAR采用VHF频段时的宽带宽角扫描、高隔离双线极化天线设计和低剖面、轻重量、高抗震等应用难点,设计了一种P波段宽带宽角高极化隔离度天线;结合实际飞行试验数据,验证了该天线具有良好的性能.同时针对VV极化角反点目标脉压双峰现象,进行了旁附物对距离频谱影响的仿真,并提出了机载挂飞应用注意事项.

Aiming at the application difficulties of wide bandwidth wide angle scanning,high isolation dual linear polarization antenna design and low profile,light weight and high shock&vibration resistance when airborne SAR adopts VHF frequency band,this paper designs a wide bandwidth wide angle high polarization isolation antenna for P-band,and then combined with the actual flight test data,verifies that the antenna has good performance.Besides,for the double-peak phenomenon of the target pulse pressure at the reverse point of the VV polarization angle,the paper carries out the simulation of the influence of side objects on the range spectrum,and puts forward the points needing attention during the hangoff flight of airborne SAR.