中文摘要：

宽带雷达作为一种新体制雷达，具有优越的反隐身能力、强的抗干扰能力、极高的距离分辨率等诸多优点。相对于传统相控阵雷达，超宽带雷达采用实时延时技术替代传统的移相器进行波束控制。该文章基于超宽带雷达相关理论进行了时域超宽带阵列天线波束扫描研究。采用对拓维瓦尔迪天线设计了四单元均匀直线超宽带阵列并进行了时域仿真及实验测试。结果表明，该阵列在X—Z平面可以实现±40°的波束扫描。阵列规模由天线单元间距决定，通过精确仿真分析天线单元间距使波束合成效果达到最优化。阵列的峰峰值方向图仿真验证了时域波束扫描理论是可行的，同时论证了实时延时技术可以被集成到时域雷达中以实现实时扫描。

英文摘要：

As a new system radar, the ultra -wideband radar has a good many advantages like excellent counter stealth capability, ultra strong antijamming capability, ultra high range resolution. The ultra -wideband radar employs real -time delay technology to make substitution of traditional phase shifter to perform beam steering in respect of traditional phased array radar. The time domain ultra - wideband array antenna beam scanning based on theory related to ultra - wideband radar is studied. 4 - element uniform straight line ultra - wide array is designed by employing the antipodal Val Di antenna, which is simulated in time domain and tested. The simulated and tested results indicate that the array can implement beam scanning of ±40° in X -Z plane. The array size is depended on antenna element space. Using precision simulation analyzes antenna element space to make beam synthesizing effectiveness reach optimization. The peak - peak pattern simulation of the array verifies feasibility of the time domain beam scanning theory, and demonstrates the real - time delay technology can be integrated in time domain radar to implement real- time scanning simultaneously.