基于FDA雷达的近场波束形成及改进

Near field beam forming and improvement based on FDA radar

针对频率分集阵列(FDA)雷达近场波束成形问题进行研究,通过分析频率分集阵列雷达近场方向图及距离损耗补偿因子,建立单基地收发阵列模型,推导距离损耗的补偿权值,提出了2种非线性频偏以改进能量聚焦的性能。此外为了使波束方向图形成的效果更好,提出了2种非线性的频偏,使之更接近于一个点状波束图,以提高能量聚焦精度。仿真结果表明,所提方法能提高距离聚焦分辨率,使聚焦能量达到更好的分辨率,并减少能量浪费。

The near-field beamforming of frequency diversity array(FDA)radar is studied.By analyzing the near-field pattern and distance loss compensation factor of frequency diversity array radar,the single base transceiver array model was established,the compensation weight of distance loss was derived,and two nonlinear frequency offsets were proposed to improve the performance of energy focusing.In addition,in order to make the beam pattern better,two kinds of nonlinear frequency offset are proposed,which are closer to a spot beam pattern to improve the energy focusing accuracy.Simulation results show that the proposed method can improve the resolution of range focusing,make the focusing energy reach a better resolution,and reduce energy waste.