车载式短波瓦特森-瓦特测向技术研究

Research of Vehicular HF Watson-Watt Direction Finding Technology

短波瓦特森-瓦特测向技术是目前比较受关注的小孔径测向技术。阐述了短波瓦特森-瓦特测向技术的基本原理,给出了在现代数字处理测向机中的工程实现技术。利用实测数据分析了短波测向天线装车前后方向图的变化,通过对比发现天线装车后的测向误差比装车前大。提出了对幅度差和相位差分别建立实测表的方法来校正装车后的测向误差。实测数据验证了该方法对提高车载短波瓦特森-瓦特测向精度的有效性,为工程实现提供了参考依据。

Watson-Watt DF method in HF is a little aperture DF technology which gets much attention. In this paper, the basic theory of Watson-Watt DF method is explained. And it gives the engineering realization technology in modern digital direction finder. It analyzes the change of orientation of the vehicular HF DF antenna. The DF error on vehicle is much bigger than on the ground. It gives a new method of constructing the tables of amplitude difference and phase difference to correct the DF error on vehicle. Also the DF correcting process is given. The practical data shows that this method is effective for improving the accuracy of HF Watson-Watt DF on vehicle.