数字T/R组件作为数字相控阵雷达系统的核心器件,其稳定性、可靠性直接影响系统的性能,而本振时钟信号的状态是数字组件稳定工作的前提。文中通过采用GaN功率器件和新型拓扑结构对链路增益重新分配,实现冗余设计。在频率源输出4 dBm~6 dBm的情况下,实现本振放大链路(单个本振放大器于50 W)200 W的输出功率,并通过阵面分配网络驱动数字组件的几千个数字通道。与传统本振放大链路的设计相比,新型放大链路可靠性可以提高一个数量级,进而使雷达系统可靠性提升;可实现阵面的多频收发功能,使数字雷达阵面具有多频收发的能力;抗干扰能力、远近目标检测和起伏目标检测等能力得到显著提高,并对雷达战术功能的丰富具有现实意义。

As the core component of digital phased array radar, the stability and reliability of digital T/R module directly affect the performance of the whole system, and the state of local oscillator clock signal is the premise of stable operation of digital module. GaN power device and a new topology are adopted to redistribute the system gain, so as to achieve redundancy design. On the conditions of 4 dBm~6 dBm of frequency source output, the output power of 200 W is achieved for local oscillator amplification link (a single local oscillator amplifier is 50 W), and several thousands of channels of digital components are driven through array distribution network. Compared with the design of traditional local oscillator amplification chain, reliability of new amplification chain can be improved by one order of magnitude, thus improving the reliability of the radar system. Multi frequency transceiver function of the array can be realized, so that digital radar array has the ability of multi frequency transceiver. The abilities of anti-jamming, and the detection of near and far targets as well as the detection of undulating targets have been significantly improved, with practical significance to enrich the tactical functions of radar.

TN958