宽带相控阵雷达发射多波束形成技术研究

针对宽带LFM 雷达发射多波束形成问题开展研究,设计了一种采用时变加权的低成本和低复杂度的同时发射多波束形成系统方案,并研制了一套S波段4通道的测试系统。该测试系统带宽>20%,中心频率在2.45GHz。在该系统中,波束形成和通道校正权值都通过在发射射频链路上以时(频)变加权的方式实现,实际测试得到的通道射频特性和远场方向图结果验证了该方法的技术可行性。

Transmitting Multi-Beam Forming Technique of Wideband Phased Array Radar

The transmitting multi-beam forming technique of wideband LFM radar is studied in this paper. To deal with the aperture effects in wideband phased array radar, a low cost and low complexity method based on time-varying weighting is proposed. An S-band 4-element protype system is designed and tested, which fractional bandwidth is over 20% and the center frequency is 2.45 GHz. In this system, the weighting coefficients of beamforming and channel calibration are modulated to the LFM signal in the transmit radio-frequency (RF) path, and the measured channel performances and far-field radiation patterns can prove the feasibility of the proposed method.