共形阵列天线超宽频带波达方向实时估计

共形阵列天线超宽频带波达方向实时估计

内容简介：为了解决航天飞行器系统中共形阵列天线超宽频带测向问题，提出了基于共形阵列天线的任意基线实时测向算法。该算法使用轮换比对的方法实现无模糊测向，将任意基线算法扩展到三维阵列中，结合虚拟基线方法，利用子阵分割技术和矩阵求逆的方法来获得二维方位角和俯仰角信息。最后通过仿真实验对比了基于对数周期天线的立体阵列和基于平面螺旋天线的平面阵列，验证了所提方法的有效性。结果表明：所提算法在相同频率下具有相近的解模糊概率，在相同信噪比下具有较高的测角精度。

Abstract：In order to solve the problem concerning the ultra-wideband direction finding for the conformal array an-tenna on an airborne system, a real-time arbitrary baseline direction finding algorithm based on the conformal array antenna has been proposed. This algorithm provides unambiguous direction finding using the rotation comparison method. The arbitrary baseline algorithm was extended to 3D array. The 2D azimuth and pitch angles estimation were acquired through use of the sub-array divided technique, matrix inversion method and the arbitrary baseline algorithm combined with the virtual baseline method. Finally, the simulation results verify the effectiveness of the proposed method by comparing the 3D conformal array based on the log-periodic dipole antenna ( LPDA) with the 2D array based on the spiral antenna. The proposed algorithm has similar solving ambiguity probability at the same frequency and high measure angle accuracy at the same SNR.

作者：司伟建, 万良田, 刘鲁涛, 田作喜, 蓝晓宇,

关键词：波达方向估计, 共形阵列天线, 任意基线算法, 虚拟基线方法, 轮换比对, 解模糊概率, 测角精度,