基于微波光子收发共用真时延网络的相控阵波束合成

Phased Array Beam-Forming Based on T-R Community Microwave Photonic True Time Delay Network

摘要:

针对相控阵雷达宽带宽角波束扫描普遍存在的孔径渡越和波束倾斜的问题,提出了一种基于微波光子技术的相控阵波束形成网络系统,该系统采用收发共用的延时方式,在保证收发波束指向高度一致的同时也减少了系统的设备量。建立了16通道的收发共用的波束扫描系统进行实验验证,实现了X频段范围内的±30°的收发波束扫描,不存在波束倾斜现象,接收和发射波束指向高度一致,结合雷达系统分时收发工作的特点,可有效提升相控阵雷达系统的扫描探测能力。

Abstract:

Due to the restriction of aperture effect and the beam deviation, it is the common problem for phased array radar to get wide instantaneous bandwidth under wide scan scope. In this paper, a phased array beam forming system based on the microwave photonic technology was proposed, which can keep high consistency between the beam-pointing of receiving and transmitting modes and reduce the number of devices. The 16 channels T-R community beam scanning system was built and tested. The experimental results show the system can realize beaming scanning under the wide scope of ±30° without beam deviation at X-band, and the beam-pointing of receiving and transmitting is highly consistent. Combined with the time-sharing receiving and transmitting characteristic of the radar system, the scanning and detection capability of the phased array radar system can be effectively improved.