基于插值虚拟阵元的均匀线列阵近场恒定束宽设计

The design of near field constant beamwidth ULA bases on interpolation virtual array unit

对均匀线列阵的远场波束和近场波束进行了比较,得出两者存在一定的差异。直接将专门的针对均匀线列阵远场恒定束宽方法应用于近场,在某些情况下,不能达到恒定束宽。本文对近场波束进行修正后,近似跟远场波束相同,从而将改变阵元数目的均匀线列阵恒定束宽方法推广到近场中,并利用插值虚拟阵元的方法提高了恒定束宽的效果。

The paper carries through comparison on far field and near field beamwidth of ULA,concluding that they＇re different.It can＇t attain constant beamwidth,if special method of far field constant beamwidth on ULA directly applied to near field in certain instance.The paper amend the near beamwidth,so that it＇s almost the same with far field beamwidth,sequentially extend the changing array unit number ULA constant beamwidth method to near field.And constant beamwidth effect is improved using interpolation virtual array unit method.